土壤空气和土壤水分贮存于土壤孔隙中，两者体积组成比例常因外界因素而此消彼长，图中虚线表示土壤中空气和水分所占比例约为4%和46%。读图回答下面试题 1.适宜多数作物生长的理想的土壤空气和水分比例变幅应在

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