In this study, SPA, SUA and SSA of the root zone at different growth periods showed a trend of decrease with the increase of soil depth.
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Effects of drip irrigation on yield, soil fertility and soil enzyme activity of different potato varieties in Northwest China.
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The sentences
With the increase of irrigation amount, SEC showed a decreasing trend, and the SEC of W3 level was 55.99% and 28.98% higher than that of W1 and W2, respectively.