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“土”为农业“八字宪法”之首,是农作物生长的基础。自力更生、艰苦奋斗地建设旱涝保收高产稳产农田,是农业学大寨的一项重要内容;也是从根本上改变农业生产条件,发展社会主义大农业的一项重要战斗任务。一、土壤的组成
“Earth” is the first agricultural character “Character Constitution”, is the basis for crop growth. Self-reliance and arduous struggle to build a well-to-do farmland for drought and flood protection is an important part of agricultural science Dazhai. It is also an important combat task for fundamentally changing conditions of agricultural production and developing large-scale socialist agriculture. First, the composition of the soil