What are no-tillage, fallow and crop rotation? Are they in line with the sustainable development direction of the United States? Why?

No-till is a protective no-till system, and its main purpose is to prevent soil erosion. 1977 previously, less tillage (less tillage) was used to indicate the tillage measures aimed at reducing the number of treading fields. 1977, the Soil Protection Bureau of the United States Department of Agriculture renamed less tillage as no tillage, and defined it as: a tillage method that does not turn the topsoil and leaves enough crop residues on the soil surface to protect the soil all the year round. Its types include no-tillage, strip tillage, stubble mulching and other tillage measures without turning the topsoil. 1984, the Bureau of Soil Conservation revised the definition of no-tillage again, and divided all tillage measures into three categories: no-tillage, less tillage and conventional tillage.

Fallow refers to planting crops on the same land for one year, stopping planting for one year in the second year and replanting in the third year. That is, farmers voluntarily fallow farmland for producing serious surplus agricultural products by signing contracts with the government. Sometimes fallow doesn't necessarily mean a year off, but it may be many years. In these years, they will go to other land for farming until the land returns to fertility, which is also called crop rotation.

Should be consistent. Compared with traditional tillage, no-tillage can reduce soil erosion, improve fuel utilization and labor efficiency, and help reduce greenhouse gas emissions, but it will reduce crop yield to some extent. Rotation of different crops can increase yield and prevent pests and diseases. The combination of no-tillage and crop rotation can protect the environment, improve the physical and chemical properties of soil, increase yield and farmers' income, which is conducive to sustainable development.