Author Archive for: johntlee@agvise.com

About John Lee

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Entries by John Lee

5 Things You Should Know About Calcium

March 4, 2021/in Base Cation Saturation Ratio, Calcium, Regional Data, Soil Chemical Analysis, Soil pH/by John Lee

1. Calcium (Ca) is abundant in soils of the upper Midwest, northern Great Plains, and Canadian Prairies; calcium deficiency in agronomic crops is rare Calcium makes up about 3.6% of the Earth’s crust, and it is relatively abundant in agricultural soils across the region. In soils with pH greater than 6.0, Ca is the dominant […]

High Soil Nitrogen following Drought: How to manage next year

August 25, 2020/in Drought, Nitrogen, Regional Data, Wheat/by John Lee

From time to time, moderate to severe droughts hit the Great Plains. Such is life in semi-arid climates. When a drought occurs, it is normal to find higher residual soil nitrate-nitrogen after harvest. Since the widespread adoption of soil testing in the 1970s, we have seen this phenomenon in all major drought years: 1988, 2002, […]