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Our long term goal is to develop effective strategic management approaches for diversification and intensification of SGP cropping systems. We are evaluating novel crops and crop rotation systems, crop productivity, and water use and precipitation-use efficiency.

Evaluating novel crops and crop rotation systems

Evaluation of novel crop and rotation in two locations in KS. Data from the experiments described above will be collected at two-week intervals during the growing seasons beginning two weeks after planting.

Rainfed Experiment - Picture 2.jpeg

Water use and precipitation-use efficiency

Site-specific weather data will be used to develop water budgets. These water budgets will allow us to estimate the impacts of drought stress on the crops and to calculate the precipitation use efficiency.

Rainfed Experiment - Picture 4.jpeg

Calibration and validation of models

Field data related to crop growth will be collected and utilized to adjust APSIM or DSSAT models for predicting biomass and yield at the system-scale.

Wheat Crop

Extension Resources

Nitrogen Fact Sheets


  • Fertilization Based on Sufficiency, Build-up, and Maintenance Concept concept.html

  • Impact of Sensor-Based Nitrogen Management on Yield and Soil Quality

  • Nutrient Loss and Water Quality

  • Organic matter in no-till production systems

  • Applying nitrogen rich strips

  • Oklahoma forage and pasture fertility guide

  • Nitrogen rich strips for wheat corn and other crops

  • Oklahoma Soil fertility handbook

  • Nitrous oxide emissions from soil

  • Cotton yield goal nitrogen rate recommendations

  • The History of the GreenSeeker sensor

  • Impact of sensor based nitrogen management on yield and soil quality

  • Using the GreenSeeker handheld sensor and sensor based nitrogen rate calculator.

  • Strip-till consideration in Oklahoma.


  • Managing No-till Wheat Following a Summer Crop in Eastern Kansas

  • Top-dress Applications of UAN Fertilizer with Herbicides on Wheat

  • No-till wheat management

  • Wheat production handbook

  • Diagnosing wheat production problems

  • Diagnosing nutrient deficiencies in the field

  • Best management practices for nitrogen

  • Wheat grain yield and protein response to nitrogen and sulfur rates

  • Wheat Fertility (several research blurbs linked in one place)

  • K-State most recent fertilizer research report

  • Long-term tillage and nitrogen fertilization effects on soil surface chemistry 

  • Effect of late nitrogen fertilization on grain yield and grain filling in corn

Water Fact Sheets

Television and Cabinet


  • Soil and Drought: Warren

  • Soil structure: Patrignani

  • Soil Compaction: Warren

  • No-till=better soil quality: Warren

  • Fertilizer interactions with soil organisms: Deng

  • Soil nutrients after rain: Arnall

  • Soil moisture differences in No-till crops: Warren

  • Grain Quality and soil nutrition: Arnall

  • Soil fertility should be at the top of your checklist: Arnall

  • Soils on Slops: Warren

  • No-till soil after a rain

  • Soil sampling

  • Everything you want to know about NPK but were afraid to ask: Arnall

  • Measuring soil moisture: Warren

  • Types of nitrogen fertilizers: Arnall

  • Managing nutrients after significant rainfall: Arnall

  • Science behind Nutrient mobility: Arnall

  • Basics of soil sampling: Arnall

  • Soil layers and how water moves through them

  • Crabgrass as forage: Rocateli

  • Nitrogen after rainfall: Arnall

  • The Power of Nitrogen: Arnall

  • Nitrogen 101: Arnall

  • Nitrogen and wheat needs: Arnall

  • Nitrogen cycle: Arnall

  • Nitrogen deficiency in wheat: Arnall

  • Nitrogen rate, what is the standford equation: Arnall

  • Summer crops and nitrogen: Arnall

  • Nitrogen and rain- should you reapply?: Arnall

  • Topdress, more for your money: Arnall

  • Is Teff for you?: Sanders

  • Nitrate toxicity in Corn: Redfearn

  • Soil Aeration and bermudagrass: Rocateli

  • Sowing your oats: Lofton

  • Summer Crops-Soybeans

  • Weeds after Rainfall: Armstrong

  • It's never too early to think about your next weeds: Manuchehri

  • Summer crop update, 2020: Lofton

General Fact Sheets

  • Producing Grazeable Cover Crops During Summer Fallow in Winter Wheat

The objective of this Fact Sheet is to discuss the potential of grazing summer cover crops and their effects on the fol-lowing winter wheat crop. All discussion is based on findings obtained from soil and weather conditions in Oklahoma and is focused on finding a middle ground between profitability and conservation. All findings and discussion mentioned in this Fact Sheet is a summary of Horn et al. (2020), which is an open-access article published in the Agronomy Journal.

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