By Brian Arnall. Learn about the range of results for samples submitted under the SWFAL crop codes 1 (Wheat), 9 (Fescue and Cool Season Grasses), and 11 (Rye Grass). Armed with the knowledge of the results of samples sent to SWFAL, make more informed decisions on management and marketing.

By David Lalman, Amanda De Oliveira Silva, Brian Arnall, Dana Zook, Jason Warren, Julia Laughlin, Kevin Wagner, Laura Goodman, Paul Beck and Lyndall Stout. Learn the definitions for the regenerative agriculture concept, describe foundational practices specific to Oklahoma agriculture, and discuss published and ongoing research related to these practices.

By Sumit Sharma and Jason Warren. Learn about soil bulk density, its relation with soil depth, soil porosity, organic matter, and particle density. The fact sheet also highlights importance of bulk density for crop production as well as its measurements for nutrient/element stock estimation in soil.

Learn about how soil acidity can be a problem for plant growth in much of Oklahoma but is most prevalent in central and eastern OK. Because acid conditions are more common in eastern Oklahoma due to its natural occurrence producers are generally better able to manage soil acidity in that part of the state. In central and western Oklahoma, the soils are not naturally acidic but have become acidic overtime. This fact sheet explains why soils become acidic and the problems acid soils create for plant growth.

Understanding soil tests allow lawn managers to effectively grow lawns and productive gardens by knowing what is missing from the soil and how to improve it.

By Brian Arnall. Learn about specific considerations which should be taken into account to get the greatest benefit from soil testing.

By Becky Carroll. Learn about native pecans and the best growing conditions in Oklahoma.

By Hailin Zhang and Barbara McCray. Read through the Oklahoma agricultural soil test summary for the years 2018-2022. You will learn the necessity of evaluating the soil fertility information for each individual county or state when estimating nutrient needs, tracking changes in soil pH and nutrient levels and when serving as a guideline for fertilizer and manure application.