Research Updates

Figure 1. Land-applied manure from finishing 5 million beef cattle per year in Nebraska contains the equivalent of 150 lb/ac/yr N applied to 1.2 million acres.
Figure 1. Land-applied manure from finishing 5 million beef cattle per year in Nebraska contains the equivalent of 150 lb/ac/yr N applied to 1.2 million acres.

Fertilizer N Substitution Values of Land-Applied Organic Materials May 7, 2018

Land application of organic materials for soil management in Nebraska is important for several reasons:

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Chart of N research treatments

Feasibility of Sensor-Based Nitrogen Fertigation Management in Corn May 7, 2018

Averaged across two years, the sensor-based N fertigation treatment consistently resulted in higher profit and nitrogen use efficiency. The use of fertigation offers the unique capability to minimize N losses by reacting to slight N deficiencies in corn by applying N multiple times throughout the season with lower application rates.

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Soybean fields in planting date study at UNL's East Campus
Planting date studies conducted on UNL's East Campus showed yield decreases of 1/4 bu/ac (2003) and 5/8 bu/ac (2004) for each day after May 1 that soybean were planted.

Amplifying Positive Impacts of Early Soybean Planting April 19, 2018

The benefits of planting soybean near May 1 are well documented. Now, what are the next steps growers can take to further expand on these benefits? Are different maturity groups warranted? What groups are typically being used in irrigated and rainfed environments in Nebraska?

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KSU Assesses Yield Potential of Drought-Tolerant Corn April 12, 2018

Research by Kansas State University on yield potential of drought-tolerant corn showed yields varied but often were equal to their non-DT counterparts. The advantage of the DT hybrids became more evident when the water stress increased to the point of leaves rolling most days.

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Figure 1. Planting into cold soil (below 50°F) when cold conditions are expected for the next 48 hours can lead to germination problems and seedlings not emerging or not emerging well. 1a. Corn seedling that started leafing out below ground and now has twisted leaves which will delay or negate normal plant development.. Figures 1b-c. Unemerged seedlings attempting to leaf out belowground. None of the seedlings shown should be counted as a productive plant.
Figure 1. Planting into cold soil (below 50°F) when cold conditions are expected for the next 48 hours can lead to germination problems and seedlings not emerging or not emerging well. 1a. Corn seedling that started leafing out below ground and now has twisted leaves which will delay or negate normal plant development.. Figures 1b-c. Unemerged seedlings attempting to leaf out belowground. None of the seedlings shown should be counted as a productive plant.

Cold Soil Temperature and Corn Planting Windows April 12, 2018

With stormy conditions back in the picture, many growers may be concerned about planting corn into cold, wet soils? By checking weather forecasts and soil temperature at planting (in the field and online) and the cold tolerance of seed, growers can identify 48-hour windows of opportunity for planting.

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Graph of yields from soybean population study

What On-Farm Research has Taught Us about Soybean Seeding Rates April 6, 2018

More than a decade of on-farm research studies in Nebraska show how soybean seeding rates (and the related input costs) can be reduced without significantly affecting yield. See what growers learned and consider whether a change might benefit your bottom line.

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What’s New with P Fertilizer Use? April 5, 2018

Studies conducted at three sites over six years with varying levels of phosphorus (P) applications indicate when a P application may be profitable.

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What’s New with K Fertilizer Use? April 5, 2018

Three studies with a total of 50 trials applying K at various rates to corn verified that the likelihood of a profitable response is very low if the soil test level is above 125 ppm.

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