Oklahoma State University



Nitrogen Requirements of Contemporary Cotton Cultivars

Lugert Altus Irrigation District Deep Sampling Handout


Nitrogen fertilizer recommendations in Oklahoma were changed in 2012.  Cotton Yield Goal – Nitrogen Rate Recommendation, Fact Sheet PSS 2158 (PDF)


Some areas with high nitrate-nitrogen concentrations in groundwater need to determine how much nitrogen is being provided through pumping.  Total Amount of N Delivered (Expressed in Pounds of N Per Acre) from Varying Irrigation Water NO3-N Concentrations and Irrigation Amounts (PDF).


This link takes you to the OSU Plant and Soil Sciences Soil, Water and Forage Analytical Laboratory homepage



This link takes you to the  Texas A&M AgriLife Cotton Resource Website - Fertility




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