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Nutrient Deficiencies
- Key to Nutrient Deficiencies in Soybean
- Key to Nutrient Deficiencies in Wheat and other Small Grains
- Key to Nutrient Deficiencies in Corn and Sorghum
Plant symptoms can be used to differentiate and identify crop nutrient disorders. Symptoms of nutrient deficiency vary with variety, growing conditions, and plant age. Similar symptoms may be caused by other abiotic or biotic stresses. Use these symptom keys to help identify nutrient disorders observed in Nebraska corn and sorghum, soybean, or wheat and small grains.
For more information on these and related topics, also check the UNL Extension publication, Nutrient Management for Agronomic Crops in Nebraska, EC155, available online, or in soft cover through your local Extension office.
Free Slide Rule Offers Quick Calculation for Nitrogen Rates
Software Tools
- Uganda Fertilizer Optimizer - is intended to maximize net returns on investment in fertilizer for finance constrained crop production through optimized selection of crop-nutrient-rate combinations. It considers 15 crop-nutrient response functions including functions for maize, sorghum, rice, dry bean, peanut, and soybean. NEW
*requires Excel 2007 or later. - Fertilizer Chooser - 8.3 MB Binary file uses Java Run Time Environment. Free download.
Manual to accompany the Fertilizer Chooser (Word file, 933KB) manual includes Installation Instructions.
- Hybrid-Maize Model - A computer program for simulating corn growth and yield
- Corn Nitrogen Recommendations Calculator
- Winter Wheat Fertilizer Calculator. Use these calculators in conjunction with Extension Circular EC 143 (PDF 889 KB, 10 pages)
- 2012 Nebraska P-Index(.xls) Instructions: Nebraska PI Documentation (*.pdf) and Troubleshooting Guide (*.pdf)
- The Value of Manure A simple calculator (*.xlsx) for calculating the value of manure. Corresponds with the NebGuide G1519: Calculating the Value of Manure for Crop Production (*.pdf)
- Whole Farm Nutrient Balance(.xls) Instructions: Estimating a Whole Farm Nutrient Balance EC189 (*.pdf )
- Nutrient Inventory (.xls) Instructions:Manure Nutrient and Land Requirement Estimator EC190(*.pdf)
Featured Pubs
UNL Publication:
Agricultural nitrogen management for water quality protection in the midwest: a Heartland Regional Water Coordination Publication. RP189