1, corn. Maize is a crop with a large amount of fertilizer; the requirements for the former crop are not strict, but soybean meal is the best. At the same time, corn is resistant to short-term continuous cropping. However, in order to obtain higher yields, it is necessary to increase the amount of fertilizer when growing corn. There are few weeds in corn fields and it is a good frontier for many crops.
2. Gao Hao. The sorghum root system is deeply engrossed in soil and can absorb deeper nutrients and moisture in the soil. Its forerunner is best with pods, but it is not easy to repeat and meet. Sorghum cornices can buckle corn or soybeans.
3, millet. Millet is a kind of shallow root crop, but the root system is more developed, and the absorption ability of sucking fertilizer is very strong. In addition, the seedling stage is slow growing and susceptible to weeding. Therefore, the former should be selected soya or corn with less fertile soil and less weeds. It is good, but it cannot be repeated, nor can it be plucked, so as to avoid the loss of crops and the reduction of production. Guzi has a hard floor and low fertility. Generally, it can be used for deducting soybeans or corn.
4, wheat. Wheat should be the best for corn and soybeans, but it can also be used as a continuous crop, but it cannot be planted on cereals to prevent grass shortage.
5, soybeans. Soybean roots are deeper into the soil and also absorb nutrients and water in the deep layers of the soil, which can increase nitrogen in the soil, improve soil structure, and restore and improve soil fertility. Soybeans have less weeds and high fertility and are good for many crops. Soybeans should not be used for continuous cropping. As the saying goes, oil sees oil for three years. Therefore, more than three years of rotation should be implemented for soybeans.
6. Beets. The roots of sugar beets are extremely large and deep in soil. They absorb more nutrients and water than other crops. They require stringent requirements for the former crops. Usually crops such as wheat, corn and soybeans are suitable, but they cannot be used continuously. Generally, they can be used for four to five years. The above rotation system. Sugar beets have low fertility and cold plasm, and crops such as wheat and corn can be grown on the basis of increasing manure.
7, sunflowers. Sunflower is a kind of oil crop with a tall plant and a well-developed root system. It needs a lot of nutrients and water, and the need for nutrients is one to two times more than that of cereal crops. Its forehead should be suitable for corn, sorghum or millet, and it is not appropriate to implement continuous cropping. Generally, the rotation system should be implemented for five to six years.
It can prevent some medicine or blood from splashing on the face, thus protecting the eyes. This kind of glasses is generally used in conjunction with masks and surgical caps to fully protect the doctor's head.
[Functions of medical eye masks]
1. Prevent blood, potion and other liquids that cause damage to the skin from causing unpredictable damage to the eyes.
2. It can prevent the impact of objects on the eyes during close surgery.
3. The inner space of the eye mask is large enough for doctors who wear myopia glasses.
4. The breathability must be good, generally there are vents
Protective goggles,disposable medical equipment,personal protection,daily protection
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