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抗旱灌水播种是解决春旱播种的一种有效形式,把此方式下的土壤水分运动看成是沿种沟方向垂直剖面上的二维水分运动,根据不同的初边......
用光学显微镜，扫描电镜和能谱仪对水压机柱塞表面孔坑，沟槽进行了分析，结果表明，由于夹杂物（尤其是表层夹杂物）与块状铁素体的存在以及淬......
Cotton water productivity was studied in Fergana Valley of Central Asia during the years of 2009, 2010 and 2011. Data wa......
Even though annual rainfall is high in the Delta region of Mississippi, only 30% occurs during the months in which the m......
