Abstract: The agricultural cultivated land types are of connected relationship.The evaluation and development of dike field, terrace and sloping field is a developing course from high to low, their benefits have characters from simple to complicatedness a
Abstract: The agricultural cultivated land types are of connected relationship.The evaluation and development of dike field, terrace and sloping field is a developing course from high to low, their benefits have characters from simple to complicatedness a
文摘:黄土丘陵沟壑区农耕地类型具有裙带关系，从沟坝地、梯田和坡耕地的演化与发展来看，具有从高位到低位的时空演化过程，其效益具有由简单到复杂，由单项到综合的迁变过程。