论文部分内容阅读
对保护土壤提高土壤肥力的注意,合理的利用土地是继续发展农业生产极重要的因素,是进步人类社会的目的。对土地的担心是有十分根据的,可以说在整个行星上每年由于各种原因失掉的土地约有6～7百万公顷,最大的是土壤侵蚀带来的损失。工业的发展城市建设要占用土地,加上人口数量的增加使现在人均耕地面积由1960年的1.04公顷降为0.87公顷。为了在新的五年计划中不再降低这个指标,就要开荒,然而这要有大规模开支,而且这些土地都是些肥力较低的土壤。因此现阶段主要是提高土壤肥力和合理
Attention to protecting the soil and increasing soil fertility, rational use of land is an extremely important factor in the continuous development of agricultural production and an objective of improving human society. The fear of land is well founded. It can be said that there are about 6-7 million hectares of land lost on various planets for various reasons every year. The biggest one is soil erosion losses. Industrial Development The land occupation in urban construction and the increase in the population have reduced the present cultivated land per capita from 1.04 hectares in 1960 to 0.87 hectares. In order to stop lowering this target in the new five-year plan, we must open up wasteland. However, this requires a large-scale expenditure, and these lands are some less fertile soils. So at this stage is mainly to improve soil fertility and reasonable