宁夏干旱带压砂与节水补灌条件下2种土壤保水剂的效果研究
저하간한대압사여절수보관조건하2충토양보수제적효과연구
Effects of Water Retaining Agent under the Condition of Gravel Mulched Ground and Water-Saving Supplied Irrigation in Ningxia Arid Zone
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