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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.
Pictured Above: BETTER TOOLS. Steve Culman, a soil fertility specialist at Ohio State University and the lead author of the Tri-State Crop Fertilizer Recommendations, says agriculture has much better tools today for understanding soil-test levels, and a large number of labs provide great services and consistent data. “Our uncertainty has really decreased and we don’t need that extra buffer of that drawdown,” he says.
One of the agronomic benchmarks both no-tillers and strip-tillers have paid close attention to over the years is the Tri-State Crop Fertilizer Recommendations for field crops.
First published in 1995, these recommendations for Indiana, Michigan and Ohio have provided a framework for managing fertilizer and soil fertility based on research station and on-farm trials conducted over time.
Even as reduced-tillage and no-till practices, cover crops, spoon-feeding of nutrients and precision farming dawned and hybrids and varieties evolved and improved their efficiency, the Tri-State guidelines didn’t change.
After several years of work, a group of researchers from Ohio State, Michigan State and Purdue universities…
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Videos
Last-Minute Planter Prep for No-Tillers & Strip-Tillers
On this episode of Conservation Ag Update, brought to you by Martin-Till, precision specialist Chad Baker, co-owner of Baker Precision Planter Works in Orangeville, Ill., helps a first-generation no-tiller with planter setup, and later encounters a couple problems with a strip-tiller’s new 24-row planter. Plus, veteran agronomist Brad Forkner checks in with a couple tips for farmers to keep in mind before they take the field.
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