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Full-Text Articles in Agriculture
Case Study Of The Profitability Of A South Dakota Farm Using The Integrated Farm Managment Program, Charles L. Prouty, Thomas L. Dobbs
Case Study Of The Profitability Of A South Dakota Farm Using The Integrated Farm Managment Program, Charles L. Prouty, Thomas L. Dobbs
Economics Pamphlet Series
This report is one of five covering case study farms in the east-central South Dakota portion of the Big Sioux Aquifer area. The other four reports are South Dakota State University Econ Pamphlets 95-1 through 95-4, published in September 1995. operators of each of the case study farms covered in the five reports were participating in some segment of the Federal farm program aimed specifically at improving the ecological sustainability of U.S. agriculture. The case farm featured in this report was participating in the Integrated Farm Management (IPM) program of the 1990 Farm Bill. Since the data collection and analyses …
Poultry Litter-Treated Length Effects On Quality Of Runoff From Fescue Plots, Dwayne R. Edwards, Philip A. Moore Jr., Tommy C. Daniel, Puneet Srivastava
Poultry Litter-Treated Length Effects On Quality Of Runoff From Fescue Plots, Dwayne R. Edwards, Philip A. Moore Jr., Tommy C. Daniel, Puneet Srivastava
Biosystems and Agricultural Engineering Faculty Publications
Using experimental data and/or mathematical simulation models to identify practices that reduce pollution from manure-treated areas is sometimes perceived as limited by the unknown validity of extrapolating plot-scale data to larger areas and by uncertainties in modeling transport of various pollutants. The objectives of this study were to assess the effect of length of manure treatment on runoff concentrations of poultry litter constituents and to define the modes of transport (particulate versus soluble) for nitrogen (N), phosphorus (P), carbon (C), and solids. Poultry litter was applied to three 1.5- x 18.3-m fescue (Festuca arundinacea Schreb.) plots with runoff collection …
Quality Of Runoff From Four Northwest Arkansas Pasture Fields Treated With Organic And Inorganic Fertilizer, Dwayne R. Edwards, Tommy C. Daniel, John F. Murdoch, Philip A. Moore Jr.
Quality Of Runoff From Four Northwest Arkansas Pasture Fields Treated With Organic And Inorganic Fertilizer, Dwayne R. Edwards, Tommy C. Daniel, John F. Murdoch, Philip A. Moore Jr.
Biosystems and Agricultural Engineering Faculty Publications
Long-term land application of animal manures, even at agronomic rates, can promote accumulation of soil phosphorus (P) which can, in turn, contribute to increased P loadings to downstream waters. The objective of this study was to assess the soil and runoff effects of replacing animal manure as a soil amendment with inorganic fertilizer (ammonium nitrate, NH4NO3) on fields that had been treated previously with animal manures. Runoff from two pairs of small fields (0.57 to 1.46 ha) was sampled from September 1991 to April 1994. All fields had been treated previously with animal manures; after runoff …
Simulation Of Runoff Transport Of Animal Manure Constituents, Yang Wang, Dwayne R. Edwards, Tommy C. Daniel, H. Don Scott
Simulation Of Runoff Transport Of Animal Manure Constituents, Yang Wang, Dwayne R. Edwards, Tommy C. Daniel, H. Don Scott
Biosystems and Agricultural Engineering Faculty Publications
Runoff losses of land-applied animal manure constituents can adversely affect the quality of downstream waters. Reliable mathematical simulation models can help estimate runoff losses of animal manure constituents and identify management measures to reduce these losses. The objective of this study was to develop and calibrate an event-based simulation model to describe the runoff transport of solids (soil and manure particles) and nutrients (nitrogen and phosphorus) from areas treated with animal manure. The resulting model, consisting of linked hydrology, soil/manure transport, and nutrient transport components, is process-oriented and uses measurable parameters to the greatest degree possible. The three components of …
Application Of Simplified Phosphorus Transport Models To Pasture Fields In Northwest Arkansas, Dwayne R. Edwards, C. T. Haan, Andrew N. Sharpley, John F. Murdoch, Tommy C. Daniel, Philip A. Moore Jr.
Application Of Simplified Phosphorus Transport Models To Pasture Fields In Northwest Arkansas, Dwayne R. Edwards, C. T. Haan, Andrew N. Sharpley, John F. Murdoch, Tommy C. Daniel, Philip A. Moore Jr.
Biosystems and Agricultural Engineering Faculty Publications
Runoff transport of phosphorus (P) is often predicted from simple equations with parameters determined from data applicable primarily to row-cropped and fallow cover conditions. The applicability, accuracy, and precision of such P transport prediction equations under pasture situations are less well defined. The objectives of this study were to determine parameters of simplified runoff P transport equations for pasture fields and to assess the accuracy and precision of the equations. Runoff, sediment yield, soluble P transport, and particulate P transport data were collected from four pasture fields in northwestern Arkansas. Runoff event enrichment ratios and extraction coefficients were computed, and …
Ec96-143 Pesticide Runoff And Water Quality In Nebraska, Steven Comfort, Thomas G. Franti, S.K. Smith
Ec96-143 Pesticide Runoff And Water Quality In Nebraska, Steven Comfort, Thomas G. Franti, S.K. Smith
University of Nebraska-Lincoln Extension: Historical Materials
Nebraska's natural resources provide its residents with an abundance of wildlife, recreation, and agricultural opportunities. Some of the state's most important resources are its lakes, rivers and streams. These surface waters provide year-round habitat for aquatic and terrestrial wildlife, rest stops for migratory birds, and countless hours of enjoyment for outdoor enthusiasts. In addition, surface waters provide a source of drinking water for many Nebraska residents, and are vital for some farming and industrial operations. To better understand how surface waters become contaminated from pesticide runoff, the various factors and processes influencing runoff must be understood. With this understanding, pesticide …
G96-1299 Agricultural Management Practices To Reduce Atrazine In Surface Water, Thomas G. Franti, Fred Roeth, Robert N. Klein, David L. Holshouser, Andrew P. Christiansen, James A. Schild, Gary L. Zoubek
G96-1299 Agricultural Management Practices To Reduce Atrazine In Surface Water, Thomas G. Franti, Fred Roeth, Robert N. Klein, David L. Holshouser, Andrew P. Christiansen, James A. Schild, Gary L. Zoubek
University of Nebraska-Lincoln Extension: Historical Materials
Ways to reduce atrazine availability, reduce the amount of water runoff, and reduce the impact of the first runoff are covered here. Each year growers face many decisions when planning for a new growing season, including selection of an economical weed control program. Because of their ease of use and effectiveness, many producers use preemergence herbicides to control weeds. Because of its low cost, corn and sorghum growers often select atrazine or an atrazine combination. Nebraska corn growers annually apply an estimated 6.3 million pounds of atrazine. Atrazine is an effective and low-cost herbicide, but there is a hidden cost …