北部降水变化幅度较大的时候则出现在秋季，与年总降水量变化趋势相同。
The season with the larger rate in the northern is autumn and the same trend as the total precipitation rate.
进行中耕锄草处理的冬枣树，上层生长根和吸收根变化幅度较大，变化不定；
Under intertilled weeding, the growth root and the absorption root in the surface layer chang a lot, and the changing is not steady;
不同利用年限菜地土壤酶活性变化幅度较大，能够更为敏感的指示土壤质量的变化。
Soil enzyme activity varied obviously with duration of vegetable plantation and could be cited as a sensitive indicator of changes in soil quality.
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