Education Commons^™

G93-1182 Best Management Practices For Agricultural Pesticides To Protect Water Resources, Robert J. Wright, J. F. Witkowski, Larry D. Schulze

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide discusses what happens to pesticides after application, factors affecting pesticide movement, and best management practices to minimize the potential for pesticide contamination of ground and surface water.

Users of pesticides and other agricultural chemicals must take appropriate precautions to reduce the risks of moving these materials into ground or surface water. The primary consideration should be whether the chemical is needed. If pesticides are needed, then the characteristics of the chemical, the sensitivity of the application site and the method of application should be considered.

G92-1081 Factors That Affect Soil-Applied Herbicides, R. S. Moomaw, Robert N. Klein, Alex Martin, Fred Roeth, P.J. Shea, G.A. Wicks, R. G. Wilson

University of Nebraska-Lincoln Extension: Historical Materials

Characteristics of soil-applied herbicides are discussed, including site of uptake by weeds, solubility, adsorption, persistence, leaching potential, photodecomposition, and volatility. For best performance, preemergence and preplant herbicides must be placed in the top 0 to 3 inches of soil. Placement is important because the herbicide must enter the germinating weed seedling in order to kill it. Herbicides can be blended into the soil by mechanical incorporation, rainfall, or sprinkler irrigation, depending on the herbicide. Herbicide characteristics that determine their performance are site of uptake by weeds, solubility, adsorption, persistence, leaching potential, photodecomposition, and volatility. An understanding of these factors will …

Rb63-211 Performance Of Alfalfas Under Five Management Systems, W.R. Kehr, E.C. Conard, M.A. Alexander, F.G. Owen

University of Nebraska-Lincoln Extension: Historical Materials

This bulletin reports stands, forage yields, and other agronomic data on alfalfas of diverse origin or type tested under five management systems at Lincoln, Nebraska.

Narrow-crowned and broad-crowned types were tested. The management systems involved non-irrigated alfalfa-bromegrass tests (a) continuously grazed with steers, (b) cut for hay, and (c) rotationally grazed with sheep; an irrigated alfalfa-bromegrass test rotationally grazed with dairy cattle; and irrigated tests of alfalfas in pure stands cut for hay.