Through long period experiments in Southern Ningxia, the paper gave the results that cropland soil moisture could be recovered or mainly recovered ate 80% ̄100% of FC lever. The best recovered is pealand, and the last is potato land. So the area was classed as the yearly water recovery region. Its 0 ̄2m depth soil could be mainly or completely compensated. The recovery begin at july and end at october with the tendency; slop land s completed a month earlier than table land, tableland s finished half a month e...
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