|The four ‘R’s|
|Written by James J. Hoorman|
|Thursday, November 29, 2012 1:16 PM|
Using the right fertilizer rate starts with knowing your crop nutrient requirements. The right rate should be based on soil and tissue tests taken from an accredited laboratory and should be based on Tri-state agronomic fertilizer guidelines. Soil tests should be taken a minimum of every 3-5 years. A study of agricultural testing laboratories found that while a majority were testing and reporting nutrient levels correctly; their guidelines for the amount of fertilizer to apply were vastly different. So in many cases, fertilizer was being recommended when it was not needed (Mullen and Dayton, 2011). Farmers need to keep good fertilizer records to see how their soil tests change over time.
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