How to improve poor soil

Improvement of thin and sticky soil This kind of soil is generally sticky, poor in permeability, strong in water and fertilizer retention, easy to accumulate water, high in potential nutrient content, slow in decomposition of organic matter, easy to accumulate, long in fertilizer, small in temperature difference between day and night, difficult to cultivate The cultivation period is short, the quality of cultivation is poor, and the sealing structure is poor.

Improved method: First, re-apply organic fertilizer. The organic fertilizer applied is easy to form humus, thereby promoting the formation of agglomerate structure and transmitting soil structure and tillage. Generally, 15-20 tons of organic fertilizer per acre is applied every year, and a good vegetable field can be formed in 3 to 4 years. The second is to reduce the viscosity by sand pressing. Under conditions of condition, 20~30 tons of river sand soil should be applied per mu, for two consecutive years, combined with organic fertilizer, the sticky soil can be improved.

Low-salt saline-alkaline soils are generally prone to water accumulation, high in salt content, and their pH value is above 8, which hinders the normal growth of crops.

Improved method: First, increase the application of organic fertilizer to promote the improvement of organic matter content. The most basic method of improving saline-alkali soil is to cut off the connection between the topsoil and the capillary of the subsoil. The organic matter can be converted into humus, which promotes the formation of agglomerate structure of the topsoil and acts as a salt compaction. Therefore, deep cultivation combined with a large amount of organic fertilizer is an effective measure. The second is agricultural biological measures, including leveling land, soil fertility, planting alkali-tolerant crops and green manure. The third is chemical improvement measures, mainly using soil amendments.

Improvement of sandy soil: The sandy soil is generally characterized by excessive looseness, water leakage and leakage, lack of organic matter, large evaporation, low heat preservation performance, short fertilizer, and easy to remove fertilizer in the later stage.

Improved method: First, a large amount of organic fertilizer is applied. This is the most effective way to improve sandy soil. That is to put all kinds of manure and compost into the soil during spring or autumn tillage. Due to the buffering effect of organic matter, soluble chemical fertilizer can be applied appropriately, especially ammonium nitrogen fertilizer and phosphate fertilizer can be preserved. No loss in the soil. The second is the large application of river mud and pond mud, which is also a good way to improve sand. If you can apply 4 to 10 tons of river mud per mu per year. Combining farming, adding organic fertilizer to blend the soil: Since most of the topsoil rich in organic matter is removed during the new construction of the solar greenhouse, the primary problem of the new greenhouse is to increase the organic matter content in the soil. Soil organic matter has the functions of providing nutrients and nutrients needed for crops, improving soil physical and chemical properties, and enhancing soil fertility and cushioning properties. After a few years, the soil fertility will inevitably be greatly improved, excessive loosening and leakage, and the situation of leakage will be improved. The third is to grow legumes, intercropping, and cropping in the vacant season between the two seasons to increase humus and nitrogen fertilizer in the soil. Fourth, the soil with thin sand layer can be pressed in the late autumn, so that the clay at the bottom layer is mixed with sand to reduce the sand property.