Top Dog Ag LLC

Most overlooked aspect of soil tests in NE IA.... IMHO it is soil pH. I see way too many acres that have grid sampling done & no action taken on correcting soil pH. Technical definition: -log (H+). Which means the more hydrogen ions you have the lower your pH goes. Generally for soils in NE IA if more than 10% of your CEC is occupied by H+ you likely need to take corrective measures to adjust pH. pH drives soil biological activity and thus nutrient availability. When I see pH levels in the mid 5's and even in the 4's we know there is significant yield loss. Our studies show soil pH should be 6.3 to 6.7 in row crops to optimize yield. Two columns on most soil test results. Soil pH and buffer pH. Soil pH tells you yes or no you need to correct. Buffer pH indicates amount of product like lime you need. Once corrected & soil is in balance you can often times go a lengthy period without additional applications. Be sure to be checking out your soil tests during this rain delay!! Contact your local Pioneer sales rep with questions.