To study chemical composition and zinc status of soils of Dadu Taluka [Pakistan]
2001
Panhwar, R.N. (National Sugarcane Research Inst., PARC, Thatta (Pakistan)) | Memon, S.M. | Chowhan, M.
The present study was undertaken to assess the zinc status of the soil in taluka Dadu. For this purpose 40 soil samples were collected from 20 locations at the depths of 0-15 and 15-45 cm during the year 1997-98. The soil samples were analyzed for AB-DTPA Extractable zinc along with some physico-chemical properties of the soil. It was observed that majority of the soil were heavy in texture, non saline, alkaline in reaction, poor in organic matter and calcareous in nature. The analysis of the soil for AB-DTPA Extractable zinc showed that zinc was deficient in almost all the soil. At 0-15 cm soil sampling depth, 70% samples were found low (less than 0.0 mg kg-1) 15% were marginal (0.9-1.5 mg kg-1) and 15% samples were found adequate (1.5 mg kg-1). All the samples at 15-45 cm depth were found low (less than 0.9 mg kg-1) in zinc content. The correlation coefficient studies for zinc showed negative and non significant relationship with electrical conductivity, pH and lime except organic matter which showed positive and non significant association with zinc. As the soil under study were alkaline and calcareous in nature, thus it was concluded that such conditions can inversely affect the availability of zinc in soil.
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