Soil Fertility

watering cornfield

Crediting Essential Nutrients Applied in Irrigation Water

December 18, 2019
Crediting some of the nitrate-N applied in irrigation water for determination of fertilizer-N rates has long been advised in Nebraska.

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Soil Amendments

December 9, 2019
Soil amendments are any materials that when added to soil will improve its properties and processes. Amendments such as lime, gypsum, manure, or biochar can provide many benefits to production systems by improving soil chemical, physical, and biological properties. Some examples of production benefits from amendments include raising pH, adding nutrients, increasing soil organic matter, mitigating salt-affected soils, and improving soil water storage.

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Graph of potential N loss

Considerations for Fall Fertilizer-Nitrogen Application

October 30, 2019
Fall fertilizer applications offer cost savings and time management benefits, but also may contribute to increased soil nitrate-N leaching. With Nebraska's high soil moisture levels, consider these suggestions when applying nitrogen this fall.

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Field of wheat

New Study Helping to Guide Future Nitrogen Management of Winter Wheat for Grain Yield, Protein, and Bread Quality

October 29, 2019
Preliminary results are in from the first year of a two-year study to evaluate how soil N levels affect protein in Nebraska wheat and to provide data to revise UNL fertility recommendations for dryland wheat.

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The Science Behind 50-degree Soil and Nitrogen Application

October 8, 2019
From Water.unl.edu: When applying anhydrous or an ammonia-rich manure, wait until soils start to cool. Soil temperature affects how quickly soil microbes will process ammonium nitrogen to nitrate.

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Precision manure applicator

Precision Manure Application on Display at Manure Expo

September 27, 2019
Extension Engineer Rick Koelsch shares highlights from the 2019 Manure Expo. Precision technology paired with well-designed application equipment was key to achieving uniformity in manure fertilizer applications.

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manure

3 Resources on How Animal Manure Can Benefit Your Soils

June 4, 2019
Animal manure can be a valuable soil nutrient. Three stories at Water.unl.edu explore how manure improves soil fertility and productivity, how poultry manure can be managed in crop production, and how composted beef manure can be added to sugar beet production.

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Figure showing the marginal net returns to N fertilizer application for irrigated corn following corn and corn following soybean. The analysis was done for $4/bu corn and fertilizer costs of 7 lb N and 9 lb N equal to value of one bushel of grain or of $0.57/lb N and $0.44/lb N, respectively.

Effects on Profitability and Nitrogen Loss from Reducing N Rate for Corn

February 5, 2019
This study looks at how various reductions in nitrogen application rates in corn might reduce nitrogen loss to the environment and what the costs of those changes would be in yield and profit.

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