How to Apply Potassium Fertilizer to Rapeseed? Detailed Guide to the Correct Application Method

(Agricultural Wealth Network) Regarding the potassium requirements of rapeseed, Brassica napus (rapeseed) absorbs approximately 4.25 to 6.35 kg of potassium per mu to produce 100 kg of rapeseed seeds. To produce more than 100 to 150 kg per mu, potassium fertilizer must be supplemented to maintain soil potassium balance. Applying 5 kg, 10 kg, or 15 kg of potassium sulfate per mu gives yield increases of 11.7% to 51.9%. Compared with no potassium application, yields increase by 23.1% and 34.9%; however, where soil available potassium content exceeds 100 mg per kg, the effect of potassium fertilizer is not significant.