Extension
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.
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.
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.
Extension Resources
Nitrogen Fact Sheets
Oklahoma
Fertilization Based on Sufficiency, Build-up, and Maintenance Concept
Impact of Sensor-Based Nitrogen Management on Yield and Soil Quality
Nutrient Loss and Water Quality
https://extension.okstate.edu/fact-sheets/nutrient-loss-and-water-quality.html
Organic matter in no-till production systems
https://extension.okstate.edu/fact-sheets/organic-matter-in-no-till-production-systems.html
Applying nitrogen rich strips
https://extension.okstate.edu/fact-sheets/applying-nitrogen-rich-strips.html
Oklahoma forage and pasture fertility guide
https://extension.okstate.edu/fact-sheets/oklahoma-forage-and-pasture-fertility-guide.html
Nitrogen rich strips for wheat corn and other crops
https://extension.okstate.edu/fact-sheets/nitrogen-rich-strips-for-wheat-corn-and-other-crops.html
Oklahoma Soil fertility handbook
https://extension.okstate.edu/fact-sheets/oklahoma-soil-fertility-handbook.html
Nitrous oxide emissions from soil
https://extension.okstate.edu/fact-sheets/nitrous-oxide-emissions-from-soil.html
Cotton yield goal nitrogen rate recommendations
https://extension.okstate.edu/fact-sheets/cotton-yield-goal-nitrogen-rate-recommendation.html
The History of the GreenSeeker sensor
https://extension.okstate.edu/fact-sheets/the-history-of-the-greenseeker-sensor.html
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.
https://extension.okstate.edu/fact-sheets/strip-till-considerations-in-oklahoma.html
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Kansas
Managing No-till Wheat Following a Summer Crop in Eastern Kansas
https://bookstore.ksre.ksu.edu/pubs/MF2641.pdf
Top-dress Applications of UAN Fertilizer with Herbicides on Wheat
https://bookstore.ksre.ksu.edu/pubs/MF2903.pdf
No-till wheat management
https://bookstore.ksre.ksu.edu/pubs/MF2902.pdf
Wheat production handbook
https://bookstore.ksre.ksu.edu/pubs/c529.pdf
Diagnosing wheat production problems
https://bookstore.ksre.ksu.edu/pubs/S84.pdf
Diagnosing nutrient deficiencies in the field
https://bookstore.ksre.ksu.edu/pubs/MF3028.pdf
Best management practices for nitrogen
https://bookstore.ksre.ksu.edu/pubs/MF2202.pdf
Wheat grain yield and protein response to nitrogen and sulfur rates
https://newprairiepress.org/cgi/viewcontent.cgi?article=7757&context=kaesrr
Wheat Fertility (several research blurbs linked in one place)
https://www.sunflower.k-state.edu/agronomy/wheat/wheat_fertility.html
K-State most recent fertilizer research report
Long-term tillage and nitrogen fertilization effects on soil surface chemistry
https://newprairiepress.org/kaesrr/vol3/iss3/3/
Effect of late nitrogen fertilization on grain yield and grain filling in corn
https://newprairiepress.org/kaesrr/vol5/iss6/4
Soil Test Interpretations and Fertilizer Recommendations (PDF)
Suggested maximum rates of fertilizer to be applied directly with seed
Management Practices Affecting Nitrogen Loss from Urea (PDF)
Images of nutrient deficiencies
​https://www.agronomy.k-state.edu/extension/soil-fertility/nutrient-deficiencies/index.html
Water Fact Sheets
Oklahoma
Fate of Precipitation Falling on Oklahoma Cropland
https://extension.okstate.edu/fact-sheets/fate-of-precipitation-falling-on-oklahoma-cropland.html
Tracking Drought Using Soil Moisture Information
https://extension.okstate.edu/fact-sheets/tracking-drought-using-soil-moisture-information.html
Kansas
Water use of Oilseed crops
https://www.ksre.k-state.edu/irrigate/oow/p11/Aiken11.pdf
Dry bean water management
https://www.ksre.k-state.edu/irrigate/oow/p06/Yonts06.pdf
Soil, water, and plant relationships
https://www.ksre.k-state.edu/irrigate/reports/L904.pdf
Agricultural crop water use
https://bookstore.ksre.ksu.edu/pubs/L934.pdf
Efficient crop water use in Kansas
https://bookstore.ksre.ksu.edu/pubs/MF3066.pdf
Crop water use in limited-irrigation environments
https://www.ksre.k-state.edu/irrigate/reports/Stone06.pdf
Year to year variations in crop water use functions
https://www.ksre.k-state.edu/irrigate/reports/r15/Kisekka_15.pdf
Soil management videos
https://www.agronomy.k-state.edu/extension/soil-management/videos.html
​
SUNUPTV VIDEOS
Soil and Drought: Warren
https://www.youtube.com/watch?v=B91sHN34np8&t=27s
Soil structure: Patrignani
https://www.youtube.com/watch?v=WVz4JJC9lfg
Soil Compaction: Warren
https://www.youtube.com/watch?v=F0YLMaUa_Dk&t=130s
No-till=better soil quality: Warren
https://www.youtube.com/watch?v=I_7d0h2bSoY&t=3s
Fertilizer interactions with soil organisms: Deng
https://www.youtube.com/watch?v=vas0mO4JnTE
Soil nutrients after rain: Arnall
https://www.youtube.com/watch?v=w7W9maBtRJo
Soil moisture differences in No-till crops: Warren
https://www.youtube.com/watch?v=0C2a1JCU6pA
Grain Quality and soil nutrition: Arnall
https://www.youtube.com/watch?v=K6NQdo9tPl4
Soil fertility should be at the top of your checklist: Arnall
https://www.youtube.com/watch?v=O-vwJ4IdFUk
Soils on Slops: Warren
https://www.youtube.com/watch?v=-ei2f_KiJrI&t=52s
No-till soil after a rain
https://www.youtube.com/watch?v=jUNZGiRPD9Q&t=76s
Soil sampling
https://www.youtube.com/watch?v=nzwjMCvyKSk
Everything you want to know about NPK but were afraid to ask: Arnall
https://www.youtube.com/watch?v=TuOQYzVDCgg&list=PLglOSpV-TcaeOvjhkQM7AD1zfJ9K9Y5ht
Measuring soil moisture: Warren
https://www.youtube.com/watch?v=paJKconkZNc
Types of nitrogen fertilizers: Arnall
https://www.youtube.com/watch?v=eYpPuZre6OY
Managing nutrients after significant rainfall: Arnall
https://www.youtube.com/watch?v=osnHiN_A71U
Science behind Nutrient mobility: Arnall
https://www.youtube.com/watch?v=N_1fPCAJrDI
Basics of soil sampling: Arnall
https://www.youtube.com/watch?v=ZkWj9HHaSNY
Soil layers and how water moves through them
https://www.youtube.com/watch?v=5FhL2S-EUno
Crabgrass as forage: Rocateli
https://www.youtube.com/watch?v=h0o2Qd94J-Q
Nitrogen after rainfall: Arnall
https://www.youtube.com/watch?v=wc20Fz4rayU
The Power of Nitrogen: Arnall
https://www.youtube.com/watch?v=mG64wq4Hbx4
Nitrogen 101: Arnall
https://www.youtube.com/watch?v=uqxvQw6sSMs
Nitrogen and wheat needs: Arnall
https://www.youtube.com/watch?v=94_mJts0vVk
Nitrogen cycle: Arnall
https://www.youtube.com/watch?v=B7TJZUm5EXo
Nitrogen deficiency in wheat: Arnall
https://www.youtube.com/watch?v=SYJbe9rjjBA
Nitrogen rate, what is the standford equation: Arnall
https://www.youtube.com/watch?v=j9HnOy4Bezc
Summer crops and nitrogen: Arnall
https://www.youtube.com/watch?v=i55FA-Lna7Y
Nitrogen and rain- should you reapply?: Arnall
https://www.youtube.com/watch?v=hJ0Ik_c4kJI
Topdress, more for your money: Arnall
https://www.youtube.com/watch?v=oeCs8-kOJKI
Is Teff for you?: Sanders
https://www.youtube.com/watch?v=4FduEpPHtxs
Nitrate toxicity in Corn: Redfearn
https://www.youtube.com/watch?v=GguOOGzeOWk
Soil Aeration and bermudagrass: Rocateli
https://www.youtube.com/watch?v=ncAPS8U7Ac4
Sowing your oats: Lofton
https://www.youtube.com/watch?v=41qBaaKJlKY
Summer Crops-Soybeans
https://www.youtube.com/watch?v=9GfS1oIbnls
Weeds after Rainfall: Armstrong
https://www.youtube.com/watch?v=Fe62bMjapIo
It's never too early to think about your next weeds: Manuchehri
https://www.youtube.com/watch?v=xLTZK4UESLM
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.