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E.W.Russell教授于1975年指出,1972年在伦敦举行的农业发展技术顾问组第六次土壤学家会议上曾提出:“现在越来越感觉到,与其说土壤养分条件限制了作物产量,还不如说往往是土壤物理条件限制了作物产量。不良的土壤物理条件往往通过危害土壤
Professor EW Russell pointed out in 1975 that at the Sixth Soil Science Meeting of the Agricultural Development Technical Advisory Group held in London in 1972, ”At present, it is increasingly felt that soil nutrient conditions have not so far limited crop yields As it is often said that soil physical conditions limit the crop yield. Bad soil physical conditions are often through the soil