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OSU Extension

College of Food, Agricultural, and Environmental Sciences


Orchardgrass Hay


Seeding Year: 2019

Prior to seeding year: Corn/Soybean rotation

Report Date: May 20, 2021

Issue: Stand stunting and yellowing. Applications of Urea was applied after 1st cutting with no stand improvement. Why are field edges and areas around edge of round bale storage green and healthy? 



Approach: 1st step is take soil samples. 15 samples were pulled from 6" depth. Results shown below. After seeing the results, the yellowing likely most severe in areas where forage had been removed and adeqaute nutrient were not replaced. Likely explaining why the field edges and un-harvested areas were less sympomatic. According to tri-state recommendations, the recommended application rate was 76lbs of P205 and 268lbs of K2O. Research shows that for each ton of hay produced, 12lbs of P2O5 (phosphorus) & 49lbs of K2O (potassium) are removed. Often times, K2O is not replaced adequately with balanced fertilizers. 300lbs of 9-23-30 was applied to give us 69lbs of P2O5, 90lbs of K2O, and 27lbs of N. Additional applicatoins of 0-0-60 can be applied at a later date depening on budget and preference of producer. Soil sampling can be conduted about 2 months after application to reassess K2O needs. 


Forage fertility calcultor and resources: