【摘要】 <正> 土壤水分是土壤肥力的主要因素之一。在黄土台原阶地区,土壤水分状况如何,对作物生长和产量形成有重要影响。而土壤水分对作物的有效性大小与它存蓄部位的深浅是分不开的。在一定深度范围内,蓄得深一些,蒸发损失的可能牲就小一些,土壤水分的有效利用率就高。这是因为土壤水分的蒸发损失既受土壤因素限制,又受大气条件影响。在一定的土壤条件下,蓄水部位与地面距离大,受大气影更多还原

【Abstract】 Infiltration of water into soil of arid loess terrace was investigated , four different methods of tilling having been used, namely: deep plowing, rotational plowing. harrowing and conventional way of tilling and turning over the soil. The findings are dealt with in the paper .The author measured the amount and depth of infiltrating water under different conditions of tillage, moisture applied in the form of both precipitation and artificial rains. The two last-mentioned methods of tillage are found to be less effective in holding moisture,mainly due to difference in porosity and depth of tilling.更多还原