Adjust structure of animal husbandry, change agricultural fat input amount waits, can improve the systematic material flow situation effectively, Make the system turn towards benign cycle.
而调整畜牧业的结构，改变农肥的投入量等，可以有效地改善系统的物流情况，使系统向良性循环。
The theory of the agricultural economy analysed the relationship of input and output in thd function of agricultural production;
农业生产经济学理论分析了农业生产函数中的投入产出关系；
Fertiliser, a crucial input to the agricultural sector, forms the backbone of the Indian economy.
肥料，对于农业生产部门是至关重要的，是印度经济的支柱。
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