SCIENTIA GEOGRAPHICA SINICA ›› 1989, Vol. 9 ›› Issue (2): 152-157,196.doi: 10.13249/j.cnki.sgs.1989.02.152

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WATER SOIL CONDITIONS OF AGRICULTURAL PRODUCTION IN SANDY BOTTOMLAND IN YULIN, NORTHERN SHAANXI

Chen Guangting   

  1. Lanzhou Institute of Desert Research, Academia Sinica
  • Online:1989-03-20 Published:2012-04-13

Abstract: According to the origin and formation process, the sandy bottomland in Yulin, northeru Shaanxi is divided into three types: ancient valley, lake-mire lowland and wind erosion lowland. Among them, the lake-mire lowland accounts for over 75% of the total bottomland area. Taking Mangkeng bottomland as an example, the author analyses the advantages and disadvantages of water and soil conditions in the lake-mire bottomland. Because it developed from peat mire, peat layer and gley horizon are universally distributed under the soil layer. The peat layer consists of humus which is not completely decomposed. It can be used after maturation forced by man. The low tempe rature and excessive water saturation caused by gley horizon ropiness are the disadvantages of agricultural production. In accordance with the conditions mentioned above, the measures proposed are combining well drainage and well irrigation with ditch drainage, using turf and surface sand to improve soil, building the basic farmland with stable and high yield to develop agricultural production in bottomland.