The artificial planting of alfalfa late grass is best carried out on the land with deep soil layer, convenient irrigation and drainage and ph value of 6.5-7.5. Before planting, it is necessary to prepare soil and remove all weeds. After deep ploughing and intensive cultivation, 2000 kg of decomposed fertilizer, 0/0 kg of potassium sulfate/kloc and 50 kg of calcium superphosphate should be applied to each mu of land.

2. Seed treatment

Alfalfa can be planted by sowing. After its seeds are cleaned and dried, it can prevent alfalfa from diseases and pests at seedling stage by sowing pesticides, herbicides, rhizobia and fertilizers, and adding rhizobia and other fertilizers can improve alfalfa yield.

3. Sowing and planting

Sowing time is most suitable in spring and autumn. Generally, the drilling method is adopted, and the treated seeds are sown into the soil at a certain row spacing, which is generally 0-75- 1 kg per mu. After sowing, cover with a thin layer of soil to keep the soil slightly wet, and alfalfa will sprout and grow soon.

4. Maintenance management

When alfalfa grows, thin fertilizer should be applied to it regularly, and weeds should be removed in time after each harvest so as not to affect the normal growth of alfalfa. Pay attention to irrigation of alfalfa in dry season and drainage in rainy season to avoid death after being flooded.