Rapeseed goes through four different growth stages: seedling stage, bud stage, flowering stage and mature stage, forming various organs such as roots, stems, leaves, flowers and fruits, and producing a lot of starch, fat and protein. The final yield of rapeseed per hectare is 1500 ~ 2250 kg, or the corresponding dry matter yield is1500 ~ 2250kg ~ 6500kg.

To form such a large number of products, in addition to sunlight, temperature and moisture, we also need to absorb various nutrients from the soil.