Source: Becker Underwood via Seedquest.com
Soybeans need nitrogen — and lots of it — to reach their full yield potential. As much as 300 pounds of nitrogen can be required to produce a yield of 75 bushels per acre.
Whether a commercial inoculant was applied to the seed or not, conducting in-field evaluations of soybean root nodulation can provide growers insight on how to increase yield potential the next time soybeans are planted in that field.
"Some of the nitrogen comes from oxidation of organic matter in the soil, but the balance is produced by rhizobia bacteria residing in nodules on the plant's roots," said Jim Beuerlein, technical consultant to Becker Underwood and retired Ohio State University Extension agronomist. "That means soybean roots need to be properly inoculated with the right strain of rhizobia to effectively and efficiently provide the nitrogen needed for maximum yield. Applying a modern soybean seed treatment system containing a rhizobial component can ensure that rhizobia are present in adequate numbers for the plant."