Soil Fertility

Chart of grain yield (averages for 15 site-years) with five P application practices.

Fertilizer P for Corn: Update of Research Findings and Revised Recommendations

January 9, 2019
Results of research conducted since 2000 to address fertilizer phosphorus (P) for corn will be reviewed. The current fertilizer P recommendations for corn will be discussed and revised recommendations presented at the 2019 Crop Production Clinics.

Read more

Cattle grazing a corn field
Cows grazing corn residue may not remove as much organic material and as many nutrients as might be expected, but they will likely redistribute some nutrients in the field due to their traffic patterns.

Nutrient Removal by Cows Grazing Corn Residue

November 5, 2018
Nutrient removal by cows grazing corn residue may not be as much as you might think. Here a livestock and a forage specialist break down the numbers and look at removal rates for organic matter and minerals.

Read more

Figure 1. Final soybean stand count was not necessarily an indicator of yield in this 2017 study of the effects of late-season (R3) nitrogen application in soybean. The Lincoln County plot (left) had a final stand count of 72,000 plants per acre and yielded 72.7-73 bu/ac. The Perkins County plot (right) had a final stand count of 161,000 plants per acre and yielded 74.4-77 bu/ac.
Figure 1. Final soybean stand count was not necessarily an indicator of yield in this 2017 study of the effects of late-season (R3) nitrogen application in soybean. The Lincoln County plot (left) had a final stand count of 72,000 plants per acre and yielded 72.7-73 bu/ac. The Perkins County plot (right) had a final stand count of 161,000 plants per acre and yielded 74.4-77 bu/ac.

Is Late Season N Fertilization Warranted for Irrigated Soybean in Western Nebraska?

November 2, 2018
On-farm research trials were conducted in three southwest Nebraska counties to study whether a late season N application during the pod setting and seed filling phases would increase soybean yields.

Read more

How do I accurately credit nitrogen from manure?

Estimating Nitrogen Credit from Manure

September 5, 2018
Nitrogen in manure requires some simple planning to insure it's given proper credit for offsetting commercial fertilizer inputs. This Water.unl.edu article offers key information for calculating N credit.

Read more

Odor plumes from land application of manure
Odor plumes from land application of manure

Timing Manure Application to Avoid Neighbor Nuisances

August 14, 2018
Roughly half of all neighbor complaints of livestock odors originate from land application of manure. This article outlines the weather conditions to consider when planning a manure application.

Read more

Irrigation in corn near a cattle feedlot with cattle
Irrigating diluted animal manures on growing crops can work if you ask the right questions. (Photo by Larry Howard)

Can I Irrigate Animal Manures On Growing Crops?

June 27, 2018
Recent heavy rains have many feedlot holding ponds full and operators looking for irrigation options to apply animal manure during the growing season. Here are some considerations for applying diluted animal manures without damaging the crop.

Read more

Winter wheat field in mid April

Winter Wheat Nitrogen Applications

April 25, 2018
Spring is the ideal time to apply nitrogen (N) to winter wheat to ensure top yields. Adequate N levels promote tillering, large head size, and are the primary factor determining the protein level of the grain at harvest. There are a few things to consider to optimize N applied to wheat.

Read more

Corn plant leaves
Figure 1. Corn plant leaves exhibiting zinc deficiency (left) and iron chlorosis symptoms.

Newly Revised NebGuide: Micronutrient Management in Nebraska

April 24, 2018
A new NebGuide, Micronutrient Management in Nebraska, addresses issues of micronutrient fertilizer use with a focus on zinc and iron; other sections include micronutrient availability in soils, plant sampling, iron chlorosis, and micronutrient toxicities.

Read more