农业“八字宪法”中心是土。作物在整个生长发育过程中所需要的营养物质、水分都要从土壤中索取。因此,深耕培肥土壤是浅山农业增产的一项重要措施。近年来,在普及大寨县的群众运动中,我们积极开展了深耕改土的研究。实践证明,凡是深翻的农田,比浅耕增产20％以上,有力地促进了浅山粮食生产的发展。深翻的增产效果“深翻加一寸,粮食增一成。”这是山区农民生产实践的总结。只要坚持年年深 The center of agriculture “Character Constitution” is soil. Crops throughout the growth and development of the nutrients needed, the water must be obtained from the soil. Therefore, deep plowing and fertilizing soil is an important measure to increase the yield of shallow mountain agriculture. In recent years, in popularizing the mass movement in Dazhai County, we have actively conducted studies on deepening and improving soil. Practice has proved that all deep plowing of farmland, more than 20% increase in shallow tillage, effectively promoted the development of shallow mountain food production. The effect of increasing production of deep plowing “increase by an inch, grain increased by 10%.” This is a summary of mountain farmers’ production practices. As long as the persistence of deep years