收获豆类作物不可连根拔豆类作物（大豆、蚕豆、赤豆等）是一种固氮作物，根系上有很多根瘤，能把土壤中游离的氮素吸收储存起来，供给豆类作物生长。根瘤残体和植株的残根落叶，还能增加土壤的有机质。可是，许多农民习惯于用手把豆类作物连根拔起，这种收获方法叫人感到... Harvesting Legumes Non-uprooted leguminous crops (soybean, broad bean, red bean, etc.) are nitrogen-fixing crops with many nodules on their roots that absorb free nitrogen in the soil and store it in legumes for growth. Root nodules and leaves of plant residues, but also increase soil organic matter. However, many peasants are accustomed to uproot legumes by hand, a method of harvest that feels ...