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关中东部重力值逐年减小，关中西部重力值逐年增加。
The absolute gravity in east Guanzhong is decreased and one in west Guanzhong increased year by year.
明确了关中西部麦田不同耕作制、耕作方式与杂草的发生关系。
The result further defined the relation between the different cropping systems or the farming way and the weed occurrence.
以重建的杨陵近70年的降水序列为代表，对关中西部作物生长季降水量的变化趋势进行了分析研究。
Using the rebuilt precipitation series of Yangling in past 70 years, the climate change of precipitation for growing season of crops in western Guanzhong and it's evolution tendency was analysed.
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