Corn is millet, with a stem height of 2-3 meters, long and large leaves, monoecious flowers and slightly larger seeds than soybeans. It can be eaten, made into starch and used as feed. Corn can be divided into spring sowing corn and summer sowing corn. Spring-sown corn is generally harvested in July-August in autumn, and summer-sown corn is generally harvested in September-65438+1October in autumn. Spring-sown corn is planted in Northeast China, summer-sown corn is planted in North China Plain, and it is planted in Huang-Huai-Hai area.

Fear of waterlogging and drought in maize seedling stage will affect the growth and cause seedling death. Mild drought is beneficial to the development and rooting of roots. The advantage of corn is high yield per mu, with an average yield of 800 kg per mu and a maximum yield of 2000 kg per mu. Maize and winter wheat can be interplanted in Huang-Huai-Hai area, thus increasing the yield per mu of land. Corn can also be intercropped with soybean to improve the effect of photosynthesis, and because of the nitrogen fixation of soybean rhizobia, the amount of chemical fertilizer can be reduced. Another advantage of corn is that it can be harvested in advance and eaten as green corn, which has higher economic effect. It is more conducive to interplanting with crops with short growth period, such as interplanting with millet crops. Corn stalk is also a good feed for animal husbandry such as pigs.