Content and distribution of available trace elements in the soil of Chongqing Region, Sichuan Province
1989
Ma Junying | Qing Changle (Southwest Agricultural Univ., Chongqing (China))
The contents of available copper, iron and manganese of the soils in Chongqing are rather high with the mean values of 1.45, 35.0 and 51.4 ppm respectively. However there is a large area with rather low or deficient contents of molybdenum, boron and zinc. The contents of available Mo and B are mostly lower than the critical values. The mean values of Mo, B, Zn are 0.082, 0.19 and 0.99 ppm respectively. The availability of the trace elements is mainly related with pH value, organic matter content and parent materials of the soils
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