The soil is depleted first by having crops grown in it and second by natural weathering and bacterial action.土壤首先是被种植其中的作物消耗掉，其次受自然风化和细菌活动的侵蚀。Organic rubbers develop a resinous surface crust through weathering.有机橡胶经过风蚀后,...
The effects of weathering can be simulated in the laboratory.在实验室里可以模拟各种天气产生的影响.This suggests that the optimum for biological weathering would be in a hot, moist climate.这表明生物风化最适宜的条件是湿热气候。The movement of water is also a...