Seed Genetics Direct, the largest Ohio-based independent seed company, as well as the fastest-growing in the Eastern Corn Belt, will host its Herbicide and Seed
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Final sampling time
Samples were pulled at the V5 stage in 2020. Zinc was borderline. Adding it might have boosted yields, even though zinc was added with the starter. At the 12-leaf stage, tissue tests showed that key nutrient levels for nitrogen and potassium were dropping, most likely because the field had just suffered through a very dry period. Rain refreshed the plants, but nutrient levels weren’t up yet when samples were taken hours after the rain.
The recommended time to take the third sample if you’re only taking three is at R1, Bower says. According to the Purdue University Corn and Soybean Field Guide, it’s just before pollination and silking. By R2, kernels have formed blisters. In the Corn Watch 2020 field, samples were pulled at R2, which is still valuable information.