Micronutrient status of soils of Latif Farm: Block D and E [Pakistan]
2002
Kumari, S.
Ninety six composite soil samples were secured from forty eight sites of blocks D and E at 0-15 and 15-30 cm depths during the year 2000-2001. These samples were air dried, ground and passed through 2 mm sieve and were determined for micronutrient (Cu. Fe. Mn and Zn) status along with some soil physico-chemical characteristics. The majority of the samples ranged between clay to clay loam 50 soils of both blocks were heavy in texture. All the soils were alkaline in reaction with 84% samples in the ranges of 7.6-8.2 and 16% were in the range of 8.3-9.0 in pH and with EC value less than 2 dS m-1. The data reveled that soluble chlorides were the most dominant among soluble anions with an overall average value of 5.9 meq/1, while the carbonates were absent. The calcium was the dominant soluble cations with an overall average value of 11.6 meq/1, while the soluble magnesium with an average value of 4.6 meq/1 in both the blocks. 65 % samples were poor (less than 0.86%), 33% samples were medium (0.86-1.29 %) and only 3% samples were adequate in organic matter content. The soils were moderately to highly calcareous in nature. Ninety seven percent samples were found adequate (greater than 0.2 mg/kg), while, only 3% samples were low (less than 0.2 mg/kg) in available copper. 95% soil samples were adequate (greater than 4.5 mg/kg) and the rest (5%) were low (less than .5 mg/kg) in iron content. 98% soil samples were adequate (greater than 2.0 mg/kg), while only 3% samples were medium (1.0-2.0 mg/kg) in available manganese. 90% samples were low (less than 0.5 mg/kg), while only 10% samples were medium (0.5-1.0 mg/kg) in DTPA extractable zinc. The correlation study showed that there was positive and non-significant relationship of clay, EC and organic matter with micronutrient while most of the micronutrient showed negative and non-significant relationship with sand, silt, pH and CaCO3. It is concluded that soils of Latif Farm (Blocks L and E) were heavy in, texture, alkaline in reactions non-saline, moderately to highly calcareous in nature, poor to adequate in organic matter, adequate in Cu, Fe, Mn and deficient in Zn. It is therefore suggested that application of organic matter and zinc fertilizer at suitable rate will certainly increases the yield of the crop of the study area.
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