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农田土壤质量评价是耕地地力升降实行奖惩使用的前提。由于当前耕地土壤质量评价是以地块、地片为基础进行的。为适应这一需要,我们在第二次全国土壤普查的基础上,以太谷县为试点,将土壤普查土壤分类中之土种以下通过因素重迭法续分为土种—变种—土片三级基层分类;同时以1/万地形图作底图,用航片与地形图上对应明显地物点分别建立相应菱形锁,用相似透视网格法按成图比例尺转绘成(1/5000、1/2500或1/万)地形地块(片)及土壤质量等级图、作为农田地力升降奖惩的图幅依据。
Farmland soil quality assessment is the premise of using rewards and punishments of farmland productivity. Due to the current soil quality evaluation of arable land is based on plots and patches. In order to meet this need, based on the second national soil survey, taking Taigu County as a pilot project, we divided the soil types in soil classification of soil survey into three types of soil species-varietal-soil three Level grass-roots classification; at the same time with 1/000 topographic map as the bottom map, with aerial photos and topographic maps corresponding to the obvious points to establish the corresponding diamond-shaped locks, using similar perspective grid method into a map scale rendering (1/5000 , 1/2500 or 1 / 10,000) terrain plots (patches) and soil quality grading map, as a basis for the reward and punishment of farmland gravity relief map.