McCloskey, who launched the hugely popular agritourism farm on the border of Jasper and Newton counties, was one of 15 women to receive an Awesome Women Award in the August edition of Good Housekeeping, which hits newsstands Tuesday. She was lauded for her work in turning manure into clean fuel that powers vehicles at the farm, as well as 42 delivery trucks of Fairs Oaks cheese and dairy products. READ MORE
Phosphorus is obviously of particular concern to crop farmers.
“The harmful algae blooms occurring in Lake Erie appear to be from increasing amounts of dissolved phosphorus reaching the lake,” says Glen Arnold, associate professor and field specialist in Manure Nutrient Management Systems at Ohio State University Extension. “The phosphorus in livestock manure is less likely to reach surface waters than the phosphorus in commercial fertilizer, as the phosphorus in livestock manure is slower to become soluble once applied to fields.”
However, Arnold notes that the over-application of livestock manure can raise soil phosphorus to very high levels and result in the element being lost through both surface runoff and through subsurface drainage tiles.
Arnold believes finding new ways of applying manure to growing crops and incorporating the manure more effectively could better assure the phosphorus stays put. His research on the application of manure to growing crops first started with topdressing wheat plots in Putnam County, Ohio, in 2004.
“We wanted to capture value from the nitrogen in manure and open up new windows of application for farmers, instead of them usually applying large amounts of manure in the fall after harvest,” he explains.
Arnold and his team approached swine farmers with finishing buildings for the wheat plot experiments, as swine manure has more nitrogen per gallon than dairy or beef manure. The Putnam County Extension Office and Soil & Water Conservation District collaborated on planning, flagging the replicated plots, field application and harvesting, with plots either receiving urea fertilizer or swine manure. When the results were analyzed, wheat yields under the manure treatments were equal to or greater than the urea treatment most of the time.
By 2009, Arnold, his colleagues and county extension educators in nearby counties were using swine manure to side dress corn plots.
“We removed the flotation wheels from a manure tanker and replaced them with narrow wheels so the manure tanker could follow the tractor down the cornrows,” he says. “The yield results were very positive as the manure treatments were similar to the commercial fertilizer treatments. During unusually dry growing seasons, the manure treatments out-yielded the commercial manure treatments. The same occurred during unusually wet growing seasons as well.”
In addition to the swine-finishing manure side dress plots, during the past year the team tried liquid beef manure and liquid dairy manure, enhanced with commercial nitrogen, to side dress corn plots.
“We used a manure tanker and Dietrich toolbar,” Arnold says. “The beef manure plots performed as well as the swine manure plots. The dairy manure plots also preformed very well, which opens many possibilities for dairy producers to sidedress corn in the years ahead.”
At this point, the team has also completed a third year of side dressing emerged corn with swine manure in Darke County, Ohio, using a drag hose. The drag hose was pulled across the emerged corn through the V3 stage of growth, and the manure incorporated during application using a seven-row VIT unit. Over three years, the corn side dressed with manure averaged 13 bushels per acre more than corn side dressed with urea ammonium nitrate.
In terms of cost differences between urea and manure, Arnold notes that farmers have to eventually land-apply the manure regardless of whether it’s applied to a growing crop or not.
“Capturing the nitrogen value pays for the cost of applying the manure,” he says.
He also believes a drag hose is faster, more efficient and alleviates soil compaction concerns compared to using a manure tanker. Drag hoses also provide flexibility in that the manure can be applied anytime from the day the crop is planted through the V3 stage of corn growth, a six-week window in Ohio if the corn is planted in late April.
In these experiments on application of manure during the growing season, Arnold and his colleagues never measured phosphorus runoff, but he says that if manure is applied in the fall, more than 50 percent of the nitrogen is generally lost, and the tillage to incorporate the manure at that time causes more soil erosion than application during crop growth.
Farmers do have to watch over-application of manure to growing wheat as it will lead to the wheat field blowing flat in June in Ohio. On corn, Arnold says there is nothing to stop a person from over-applying but the extra nitrogen would be wasted.
All-in-all, Arnold believes the application of manure to growing crops works very well. He says the farmers who have participated in the on-farm plots have been pleasantly surprised at how well livestock manure has worked as a sidedress nitrogen source for corn and as a top dress to wheat.
“In addition to providing nitrogen for the corn crop, the manure can also provide the phosphorus and potash needed for a two-year corn-soybean rotation without applying excess nutrients,” he says.
In order to convince as many livestock producers as possible of the economic and environmental advantages of applying more manure to growing crops and applying less manure after the fall harvest season, Arnold and his team will allow farmers to see results first-hand. Because he’s found that farmers who participated in the sidedress plots using a manure tanker are very interested in using a drag hose, Arnold has obtained funds from several companies to build two 12-row drag hose sidedress toolbars. He expects to have them available for loan during the 2017 growing season.
“The plan is to loan the toolbars to both livestock producers and commercial applicators,” he says. “We hope to loan them out to more than a dozen participants this summer.”
Applicants may apply for funding ranging from $5,000 to $10,000. They must meet several minimum requirements, including holding at least one technical assistance workshop, reporting on workshop attendance to CDFA, and providing computers and internet access to allow dairy and livestock operators to complete AMMP applications.
Technical assistance will be made available through a partnership between CDFA and the Strategic Growth Council to achieve the mutual objective of providing technical assistance to AMMP applicants. Technical assistance workshops that provide hands-on application assistance are critical to the success of AMMP and the reduction of methane emissions from dairy and livestock operations.
Organizations that wish to receive funding to provide technical assistance must access the "Technical Assistance: Request for Applications" at https://www.cdfa.ca.gov/oefi/ammp/.
The Request for Applications contains detailed information on eligibility and program requirements. Applications must be submitted by email no later than August 16, 2017, 5:00 p.m. PDT. Grants will be awarded on a first-come-first-served basis beginning today.
AMMP is part of California Climate Investments, a statewide program that puts billions of cap-and-trade dollars to work reducing greenhouse gas emissions, strengthening the economy and improving public health and the environment—particularly in disadvantaged communities. The cap-and-trade program also creates a financial incentive for industries to invest in clean technologies and develop innovative ways to reduce pollution.
California Climate Investment projects include affordable housing, renewable energy, public transportation, zero-emission vehicles, environmental restoration, more sustainable agriculture, recycling and much more. At least 35 percent of these investments are made in disadvantaged and low-income communities.
For more information, visit California Climate Investments. This effort is in partnership with the Strategic Growth Council which provides technical and community outreach assistance funds from the California Climate Investments.
This article provides updates of interest to producers and technical service providers who may be interested in or are pursuing assistance from NRCS.
- Open feedlots are an inexpensive but potentially environmentally risky way to operate an animal feeding operation. IA NRCS offers potential incentives to producers to decommission/remove open lots and convert to a roofed, confinement operation. A recently published pamphlet: "Open Feedlot Management – Best Options" offers information regarding open lot to confinement conversion.
- IA NRCS is in the process of updating the Waste Facility Storage-313 standard. This standard provides technical guidance for planning, design, and installation of agricultural waste containments. Some of the changes include: modification of structural design requirements to account for changes in accepted concrete and timber design, improvements in safety criteria, changing requirement of staff gauge from optional to required, and the addition of criteria specific to solid manure stacking facilities. Specific proposed changes include the removal of the IDNR Open Feedlot Effluent Alternatives for Open Feedlot Operations as an acceptable design alternative to meet NRCS requirements. Also, a minimum design period is being considered for storage facilities to better integrate animal waste systems with current management and cropping systems.
- A recently published IA Instruction: "Requirements for Subsurface Geologic Investigations for Animal Waste Storage Facilities" provides requirements that apply to technical service providers and other non-NRCS engineers who are providing technical assistance for NRCS programs. Compliance with this instruction will help ensure geologic investigative requirements have been fulfilled as noted in the deliverables of the appropriate conservation practice statement of work.
- Another instruction of interest for technical service providers for NRCS programs is the "Technical and Financial Assistance for an Animal Feeding Operation and the Associated Land Application of Manure Through a Comprehensive Nutrient Management Plan (CNMP)." This document provides guidance for the specific procedures, roles and responsibilities, and administrative and technical checklists to be used when technical service providers are involved in the conservation planning process for animal feeding operations.
Nine consecutive days of temperatures above 100 degrees in the Central Valley area of the state resulted in a large jump in cattle deaths. According to an agricultural official in Fresno County, between 4,000 and 6,000 head of livestock died in the month of June due to the heat. Adding to the problem was the temporary shutdown, due to a mechanical problem, of the local rendering plant. As a result, a state of emergency was called in at least three counties and the California Dairy Quality Assurance Program (CDQAP) released an emergency mortality disposal advisory. Under the plan, producers were provided with three options to dispose of mortalities: directly transport the carcasses to an alternate rendering facility or permitted landfill; temporarily store mortalities on farm in compost piles until they could be permanently disposed of; or, as a last resort, bury the carcasses in an emergency landfill on farm, which still required a mountain load of paperwork and possibly thousands of dollars in fees.
According to the five-page advisory, producers were encouraged to put down a waterproof liner and use dairy manure solids as a composting agent, placing each adult carcass on a three foot bed of manure and then covering with a second layer of manure three feet deep. By doing this, farmers could buy themselves an extra six months of time before the carcasses needed to be disposed of permanently off farm.
“Staff will be looking for evidence of bones and carcasses that have been left more than six months,” the advisory warned, adding the number and identity of the animals composted plus documentation they had been properly disposed of would also be required.
While this isn’t the first time California has dealt with large-scale livestock deaths due to heat, it will be interesting to see how the agriculture and landfill industry deals with the added pressure to the carcass disposal system. With the threat of animal disease outbreaks, such as bird flu or foot and mouth disease, always in the background, this negative situation provides an opportunity to test-drive the official response. Heaven forbid it would be required on a state- or nation-wide scale but it’s always prudent to be prepared.
I look forward to any lessons learned which come after the debrief.
Speaking of composting, producers and custom manure applicators can learn more about the management practice and see relevant equipment in action during the North American Manure Expo, taking place in late August at the Arlington Agricultural Research Station near Arlington, Wisc. I consider Expo one of my favorite industry events of the year. What isn’t there to enjoy? Farmers, family, food, friends, farm equipment, information, demonstrations, community: the important things in life.
This Manure-a-palooza takes a year or more of planning to bring to fruition, including hours of committee meetings and conference calls. As a frequent participant in these morning gatherings, I can attest to the time and effort by industry volunteers that goes into preparing for this event. Be sure to check out the event website – manureexpo.org – and consider taking part.
Due to the proposed expansion, the Minnesota Pollution Control Agency (MPCA) is conducting an environmental review and is accepting comments through August 23.
The facility in Section 15 of Byron Township currently has one barn that holds up to 2,400 swine. Keith Schlaak of Hi-Way 30 Hogs proposes to build a second barn and double the size of the rural New Richland operation. READ MORE
“Not long after, we learned that the soil surrounding the farm where we had been spreading liquid manure was completely saturated with nutrients,” he remembers. “At the time, in the early 1990s, we had over 350 dairy cattle. Our extension agent suggested composting our solid manure and we decided to try it as a way to deal with the excess manure. The idea of selling the compost came later.”
There were no best practices available for manure composting – let alone much basic research – so Tim was left to experiment with different methods (more on that later). But success was achieved and by 1994, Bull Country Compost was born.
Demand was strong right away – Sigrist made the product attractive by offering delivery – but as word spread, demand started to outstrip supply. They needed more manure, and about three years in, another revenue stream was born through taking horse manure from their Amish neighbors along with manure from other area farms.
Nowadays, Bull Country Compost is one of the largest Class III EPA-inspected composting facilities in Northeast Ohio.
“In 2016, we sold over 45,000 bags of compost, up from 36,000 in 2014,” Sigrist says proudly. “But we actually sell more product in bulk cubic yards than in bagged form to both consumer and retail markets.”
Ten percent of the manure currently comes from their farm (Tim’s parents John and Linda sold the dairy cows in 2013 but continue to raise about 120 dairy heifers), with the remaining from other farms, auction barns and seasonal fairs.
“We have farms where we haul out once a year and others where we do pick-up every week,” says Sigrist. “All locations pay us to take it away and there is a monthly fee to have a dumpster placed. Due to wear and tear on the dumpsters and the extensive cost of trucking – and the fact that some locations are up to 100 miles away – we can’t haul it for free.”
Indeed, it was early on that Sigrist realized it would be easier to provide large manure collection bins at farms, and that number of bins continues to grow.
“They’re 30-yard roll-off dumpsters made by a nearby manufacturer,” he says. “Because manure is so corrosive, we have to continually repair and replace them.”
Back when he started, Tim knew the basics of composting. Factors such as the type of manure, composting method (oxygenation) and weather would all affect timelines and quality of the final product. He first tried windrows turned by tractor, but it was labor intensive and the Ohio rains kept the material too wet. He researched various types of vessel structures and built one of his own with a concrete base.
“It was 150-by-80 feet with a homemade top supported by wood beams,” Sigrist explains. “There were two rows of material 10-feet wide.”
Over time, he added more vessels, making them wider to accommodate larger equipment, better aerated and better able deal with excess water. Older vessels were aerated using pipes running through the manure, and newer vessels have aeration constructed into the concrete floor through ditches with perforated pipes. This arrangement allows liquid to flow out as composting proceeds.
“The liquid is captured in a drainage system that empties into our manure lagoon,” Sigrist explains. “There is a small fan in each vessel that feeds into the perforated pipes to aid air flow, and this significantly increases the temperature as well.”
Newer vessels also sport a higher hoop roof, which also boosts airflow.
The manure is composted for six to eight weeks being moved to one of three curing sheds for six to eight months. Screening is next, then bagging in the bagging shed or placement in piles for bulk sale. Sigrist created the bagging system using auger equipment and a homemade conveyor, with which four employees can bag and stack almost five tons of compost an hour.
In total, Bull Country Compost has eight vessels, with 3,000 yards of material continually being processed by about nine employees, some full-time and some part-time/seasonal (Sigrist says that similarly to many industries, finding people willing to do manual labor like bagging can be difficult). The entire operation stretches over three acres.
Multiple groups from both Ohio State University and various local soil and water conservation districts have toured the site, and Sigrist has hosted curious visitors from as far away as Alaska.
While years ago people were generally unsure about composted manure, that has changed.
“It’s been 25 years and we have many loyal customers,” Sigrist says. “Word of mouth is the best advertisement there is. Also, many of our retail locations have an open bag of compost beside the pallet of bags for sale, and this helps people to ‘see, smell and feel’ the compost. Also, through the media and internet, people’s general awareness of soil and environmental health has risen and many consumers have learned the difference between raw manure and compost on their own.”
The farm is still active, with the heifers and 500 acres of crops. Sigrist says the manure composting and farm activities support each other in unique ways, making the entire operation able to support multiple generations of his family.
The composting business has also allowed the family to branch out into offering other services such as custom litter spreader application and custom harvesting. No specific new markets or products are being pursued, but Sigrist says they are always keen to gain a larger share of the soil amendment market at garden centers, and always listen to feedback from customers and garden professionals.
“The entire journey has been a big learning experience,” he reflects. “From finding new markets and keeping up with growth to creating vessels and streamlining the process, we had to develop our own model as there weren’t any of its kind at the time.”
One project Sigrist hopes finish in the future is to pipe heat generated by the compost to the bagging shed.
“That way, bagging can start earlier in the year in more comfort,” he says. “I haven’t gotten to it yet, but in the meantime, we bought the employees nice insulated jackets!”
McCormick Farms values sustainable development, thus have an automated system integrated directly in the farm to keep the cows clean and reuse and recycle wastes.
Cows currently are all bedded with sand, so it is very important for the cows well-being that their bedding is kept dry. For more information, watch the video above!
"By writing your own NMP you can: understand the nutrient needs of your soil, learn how to improve water quality and soil health on your farm, learn how to best use your manure on your land and meet a requirement of the state's Required Agricultural Practices." The Winooski Natural Resources Conservation District is here to help you at no cost. This free program for small farms that spread manure, benefits from District staff working one-on-one with the farmer to collect and analyze soil and manure and create an individualized plan through in class instruction.
Participants will receive a land treatment plan that identifies what management practices can be implemented that will protect not only water quality and soil health, but the economic viability of the farm.
The deadline to register for this years' class is July 31, 2017. Our updated website contains valuable resources and available assistance for farmers. In addition links to handouts, presentations and upcoming workshops on the new Required Agricultural Practices.
The Winooski Natural Resources Conservation District is one of 14 conservation districts throughout Vermont. It encompasses all of Chittenden and Washington County as well as parts of Orange County (Orange, Williamstown and Washington). The district relies on grants and individual donations to complete its conservation work. The WNRCD focuses its resources on completing conservation projects within the areas of agricultural assistance, forestland enhancement, urban conservation and watershed stewardship.
Minister of Veterans Affairs and Associate Minister of National Defence and Member of
Parliament (Calgary Centre) Kent Hehr today announced a $1.1 million investment with the
University of Lethbridge to study ways to reduce methane gas emissions in cattle.
This project with the University of Lethbridge is one of 20 new research projects supported by
the $27 million Agricultural Greenhouse Gases Program (AGGP), a partnership with
universities and conservation groups across Canada. The program supports research into
greenhouse gas mitigation practices and technologies that can be adopted on the farm.
"Reducing the amount of greenhouse gases produced by the cattle sector is important both
environmentally, economically and helps build public trust. Producers want to operate in a
sustainable fashion and our study results will help them do that," said Dr. Erasmus Okine, University of Lethbridge Vice-President (Research).
The study led by the University of Lethbridge will investigate whether the use of biochar, a feed supplement, in beef cattle diets improves the efficiency of digestion and reduces the amount of methane gas produced.
Still, when a farmer decides to build a lagoon to store millions of gallons of liquid manure, the neighbors are often disappointed to find out they have little say in the matter. They can also be shocked to hear that government sometimes requires manure storage and even helps pay for it.
Since 1994, 461 manure storages have been built with state financial help, according to the NYS Department of Agriculture and Markets. Others are privately or federally funded.
The "Right to Farm" is a state law that protects 25,316 farms on 6.5 million of those 9-million acres of agricultural districts. The rest of that land is occupied by people who do not farm.
Mike McMahon, of McMahon's EZ Acres in Homer, allowed us to fly a drone over the lagoon on his dairy farm and explained how it was designed.
McMahon, other farmers and government officials say storage is the best practice to protect the environment from runoff.
Storage allows farmers to spread manure on fields on only the best days - when the soil is dry and less likely to run off of wet and frozen ground into lakes and streams. READ MORE
In 2006, the provincial government issued a moratorium on hog barn construction, saying it was necessary because hog manure was polluting Lake Winnipeg. That message has stuck with the public, despite strict regulations around manure management and hog industry efforts to change the narrative.
The pork council plans to launch another information campaign this summer to try and make its case to urban Manitobans.
George Matheson, council chair and hog producer from Stonewall, said the organization would be buying ad space in Winnipeg. The promotion is needed because anti-livestock groups and journalists are spreading incorrect information about Manitoba's hog producers.
Matheson didn't specify which media but there have been many stories this spring, mostly in Winnipeg, suggesting the hog industry and its manure could endanger Lake Winnipeg. READ MORE
Five key priorities emerged July 6 to 9 during the 2017 event. Each one could affect your operation's bottomline this summer. READ MORE
Vice Chair Dr. Frederick Prehn has been monitoring the work of a technical advisory committee set up by the DNR in October 2016 to discuss potential changes in state rules. He said he expects a draft proposal to be ready in a month or two that will be available for public review and input.
The changes are likely to address targeted performance standards for farmers in areas of the state with bedrock particularly vulnerable to groundwater contamination. READ MORE
The grants can be used to offset some of the costs of preparing Nutrient Management, Manure Management and Agriculture Erosion and Sediment Control Plans. Time is of the essence, however, because grant money must be spent by June 30.
Confined Animal Feeding Operations (CAFOs), those with 1,000 or more animal units, already must have Nutrient Management Plans in order to operate. But all Pennsylvania livestock farms, regardless of size, must have Manure Management and Agriculture Erosion and Sediment Control plans.
In fact, the requirement for a Manure Management Plan has been on the books since 1972.
Having basic manure management plans in place has been an expectation for decades. However, inspections are now occurring in Pennsylvania. READ MORE
Released in celebration of Earth Day, the guide provides a comprehensive suite of on-farm management practices to reduce a farm's environmental footprint and improve its profitability.
Specifically, the manual features a detailed explanation of the FARM Environmental Stewardship (ES) module, as well as strategies to reduce on-farm greenhouse gas (GHG) emissions in various areas of farm management, including feed, manure, energy, forage, and animal health.
FARM ES is a voluntary, farmer-driven tool that helps producers expand their sustainability efforts by using a limited amount of data about their farm. The module is based on a life-cycle assessment (LCA) of fluid milk conducted by the Applied Sustainability Center at the University of Arkansas, incorporating existing data from more than 500 dairy farms across the United States.
Launched in February, FARM ES is the third of the FARM Program's three silos, including Animal Care and Antibiotic Stewardship.
The FARM ES reference manual was developed by FARM and includes previous work completed by the Innovation Center. The World Wildlife Fund (WWF) led an independent review of the manual using a panel of subject matter experts.
"In an increasingly resource scarce world, we need to produce more food on the current amount of land, with less inputs and environmental impacts," said Sandra Vijn, director for markets and food at WWF. "FARM ES will support U.S. dairy farmers in continuously identifying better management practices for environmental stewardship. That is why WWF works with NMPF, the industry and dairy experts to ensure the program produces the best resources and solutions for farmers in terms of environmental sustainability."
This manual further demonstrates the dairy industry's culture of continuous improvement, the focus of the FARM Program.
Since 1944, the carbon footprint of a gallon of milk has decreased by 63 percent – a leading example of farmers' dedication to being good stewards of natural resources.
In addition to the manual, the FARM Program has developed an extensive library of resources regarding the program and environmental stewardship.
The Ohio Applicator Forecast is a new online tool designed to help nutrient applicators identify times when the potential nutrient loss from a fertilizer or manure application is low.
Secondly, the Ohio Agricultural Stewardship Verification Program is a pilot certification for farmers who protect farmland and natural resources by implementing best management practices on their farms.
Both programs are voluntary and were announced by Ohio Agriculture Director David Daniels, at an event at Drewes Farms in Custar, May 17. READ MORE
Luzerne County Court of Common Pleas Judge Thomas F. Burke Jr. decided to grant motions for summary judgment for the defendants and against a long list of plaintiffs who are landowners and neighbors of the hog operation. READ MORE
"Livestock are significant emission contributors," says Dr. Sean McGinn of Agriculture and Agri-Food Canada, a long-time researcher in the emissions area. "That's quite clear and generally recognized by the agricultural research community."
Fifty to 60 percent of feed nitrogen is lost as ammonia at the feedlot. Eight to 10 percent of Canada's greenhouse gas emissions are from agriculture and 90 percent of the atmospheric ammonia comes from cattle manure. Ammonia in the atmosphere is an economic loss because the nitrogen fertilizer potential of manure is lowered. And it's a health hazard. Ammonia mixes with acid to form fine aerosols, the white haze seen in confined airsheds.
"We know beef feedlots are 'hot spots' of ammonia emissions on the landscape, but we didn't know as much about the dynamics of ammonia emissions from feedlots. For example we didn't have real numbers from actual feedlots on how much is emitted, how much is deposited on nearby soil and how much re-emission occurs when that happens."
That's what McGinn and his colleague Dr. Tom Flesch (University of Alberta) set out to understand. Backed by funding from the Alberta Livestock and Meat Agency (ALMA), a two-year project investigated the fate of nitrogen in feedlots, what amount is deposited on land downwind and how much is carried long distances.
The other part of their research involves measuring methane and nitrous oxide, two prominent greenhouse gasses. Methane is produced by cattle due to the anaerobic digestion of feed in the cow's rumen and both nitrous oxide and methane come from stored manure in the pens.
The research produced significant results on several fronts from techniques to measure on a commercial scale, to new information on transfer, deposits and re-emission to nearby lands, to related opportunities for mitigation and management.
New measuring techniques
One major positive outcome was the development of new measuring technology adapted from what has been used successfully for measuring flare emissions in the oil and gas industry.
Using open path lasers that move over the feedlot and calculate concentration and wind characteristics, the system is able to measure emissions regardless of wind direction.
Measuring in real world situations offers some significant advantages to the more standard research protocols of using animals in individual chambers to measure emissions, says McGinn.
This new technique evaluates the feedlot as a whole, which means it can consider whole-unit management aspects which impact emissions. Also, by keeping animals in their natural environment and not interfering with them in any way, the laser approach promises more accurate, commercial scale results.
On a bigger picture level, this means actual feedlot emission numbers can be used in greenhouse gas assessments, an improvement from past practices of using estimates from global sources.
Early results show surprises
One of the surprises learned from this study was the fact that a significant fraction of ammonia was deposited on the land adjacent to the feedlot and, once deposited, how much was reemitted into the atmosphere.
"Our results illustrate the dynamics of reactive ammonia in the vicinity of a beef cattle feedlot," says McGinn. "It confirmed that a large portion of the nitrogen fed as crude protein is volatized from the feedlot's cattle manure. In the local vicinity of a feedlot, both ammonia deposition (14 percent of the emitted ammonia) and reemission occurred. That 14 percent is a large amount considering a typical feedlot emits one to two tonnes of ammonia per day."
There was a change in the soil captured ammonia that decreased with distance from the feedlot (50 percent over 200 m).
Logically it follows that quantifying the local dry ammonia deposition to surrounding fields is required when applying feedlot-based emissions to a large-scale emissions inventory, says McGinn. Failure to do that could mean badly misrepresenting the real situation.
"We need better emissions numbers to anchor effective public policy and fairly represent the feedlot industry in that data pool," says McGinn. "It's important to have research done before policy is set. The U.S. cattle feeding industry already has specific ammonia emission targets in place."
Related scientific paper here: "Ammonia Emission from a Beef Cattle Feedlot and Its Dry Local Deposition and Re-Emission."
March 29, 2017, Manitowoc, WI – At a recent forum on soil health and custom crops, two custom manure applicators who serve farms in east central Wisconsin described some of the practices designed to limit soil disturbance during the process.
Jesse Dvorachek, based near Forest Junction in Calumet County, reported that each of his two crews, using a total of 10 to 20 trucks, apply about 200 million gallons of liquid manure per year on Concentrated Animal Feeding Operation (CAFO) farms. READ MORE
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Impact of swine manure application timing on drainage water quality– 2016 resultsAugust 15, 2017, Ames, IA – A three-year study, starting…
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North American Manure Expo 2017Tue Aug 22, 2017 @ 8:00AM - 05:00PM
Farm Progress Show 2017Tue Aug 29, 2017 @ 8:00AM - 05:00PM
Canada's Outdoor Farm Show 2017Tue Sep 12, 2017 @ 8:00AM - 05:00PM
Farm Science Review 2017Tue Sep 19, 2017 @ 8:00AM - 05:00PM
World Dairy Expo 2017Tue Oct 03, 2017 @ 8:00AM - 05:00PM
American Biogas Council Annual Conference & BioCycle REFOR17Mon Oct 16, 2017 @ 8:00AM - 05:00PM