Items Tagged with 'Steve Culman'

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Tri-State Fertilizer ‘Bible’ Gets First Tweaks in Quarter Century

Nitrogen calculator and a switch to Mehlich-3 extraction highlight first-ever updates to the Tri-State Fertilizer Recommendations.
Researchers say the update was necessary to simplify some of the formulas, and because soils were sampled much differently 25 years ago than they are today, with higher soil sampling densities the rule now. 
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