Fertilizer

Figure showing reductions in nitrification based on temeprature. — Figure 1. Reductions in nitrification over time based on temperature.

Anhydrous Ammonia Conversion April 18, 2019

The environmental conditions allowing for anhydrous injury in 2018 are different then what we are experiencing this year. This brief looks at factors affecting the conversion from ammonia to usable soil nitrate.

Figure 1. When making decisions for your farm, check out some of the on-farm research results from 2018 to see what other growers learned.

Extension Releases Results from 2018 Farmer-Conducted Research April 12, 2019

An online database of results from the Nebraska On-Farm Research Network allows users to search and filter data from over 800 Nebraska on-farm research studies dating back to 1990.

More on Nutrient Management for 2019 April 11, 2019

This article addresses nitrogen application options for corn and availability of P and K from land-applied grain and fodder damaged by flooding. It supplements the previous article, Nutrient Management Issues for 2019.

Graph showing hypothetical illustration of variability of N loss.

Overall Efficiency of Fertilizer Nitrogen Use for Corn Production in Nebraska April 3, 2019

How well are we managing N fertilizer in corn and where can we improve to increase economic and environmental benefits.This article looks at sources of N fertilizer losses, input efficiencies and other factors.

Nutrient Management Issues for 2019 March 29, 2019

The impact on soil nutrient availability after the March snowmelt/heavy rainfall event is highly variable. The following describes what to consider in areas of little, moderate, and severe harmful effects.

Figure 1. Graph showing average (1998-2009) cumulative NO3-N loss in response to interaction effects of N treatments

Poultry Manure Reduces Nitrate Loss to Water in Iowa Study March 6, 2019

Iowa State University researchers concluded from a long-term field study that poultry manure, when applied at a rate to meet crop nitrogen (N) requirements, can reduce nitrate loss and achieve equal or better yields in corn-soybean production systems.

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.

Nitrogen Inhibitors for Improved Fertilizer Use Efficiency January 14, 2019

This article looks at how some nitrogen inhibitors temporarily reduce populations of Nitrosomonas and Nitrobacter bacteria, the soil bacteria responsible for converting ammonium to nitrite and nitrite to nitrate as well as what to look for in product claims.