Agriculture Commons^™

Ec92-736 Safety With Center Pivot Irrigation, Rollin D. Schnieder

University of Nebraska-Lincoln Extension: Historical Materials

Center pivot irrigation has proven to be an effective and low labor method of applying water and agricultural chemicals, such as fertilizers and pesticides, to cropland. It is a young industry in terms of use. Consequently, manufacturers and users of the equipment have an opportunity keep it a safe method of water application. This publication gives pointers on how to use your center pivot irrigation system.

G92-1099 Estimating Effective Rainfall, Joel E. Cahoon, C. Dean Yonts, Steven R. Melvin

University of Nebraska-Lincoln Extension: Historical Materials

How irrigators can estimate effective rainfall, and use that estimate to schedule irrigations properly. Scheduling irrigation based on crop demand (see NebGuide G85-753 Irrigation Scheduling Using Crop Water Use Data, on the checkbook method) requires an estimate of effective precipitation or rainfall. Effective rainfall estimates are also important for planning cropping sequences in both dryland and irrigationd crop production. Effective rainfall is the amount of rainfall stored in the crop root zone. Rainfall that runs off the soil surface or passes through the root zone does not contribute to crop growth and yield. There are two steps to estimating effective …

G92-1084 Culture Of Cole Crops, Laurie Hodges, R.E. Neild

University of Nebraska-Lincoln Extension: Historical Materials

How to grow successfully broccoli, brussels sprouts, cabbage, cauliflower, and kohlrabi.

Cole crops, which include broccoli, brussels sprouts, cabbage, cauliflower, and kohlrabi, can be successfully grown on most soils if drainage is good and the crop is supplied with adequate water and nutrients, particularly nitrogen. Light-textured soils usually produce earlier crops but heavier soils hold more moisture and tend to produce crops that hold quality longer at maturity.

Cole crops have shallow root systems. Inadequate moisture may cause small cauliflower heads to form prematurely. Rainfall or irrigation following a prolonged dry spell may cause splitting of cabbage and kohlrabi. Supplemental …

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 …

G92-1124 Converting Center Pivot Sprinkler Packages: System Considerations, Joel E. Cahoon, Norman Klocke, William L. Kranz

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide points out some of the system-oriented factors that should be considered when changing sprinkler packages on a center pivot irrigation system. Irrigators using existing center pivots may be interested in changing sprinkler packages for a number of reasons: to take advantage of new sprinkler technology, to overcome a poor design on the original package, to reduce energy requirements, or simply to replace worn sprinklers on an older machine.