Effect of jujube orchard abandonment time on soil properties and enzyme activities at soil profile in the Loess Plateau.

Specifically, soil samples that had undergone abandonment for periods of 14, 6, and 4 years, in addition to a 2-year interval and a control group, demonstrated a significant trend in soil aggregate stability, with the hierarchy presented as 14 years > 4 years > 6 years > 2 years > control ( P < 0.05).

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A notable trend was observed in the augmentation of > 2 mm aggregate content with the progression of natural restoration over time.

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