Micronutrient Status of Soils under Jhum and
Terrace cultivation in Manipur
Abstract
Study was conducted on distribution of micronutrients in surface soils of Jhum, Terrace soils along with the physico-chemical parameters & their co- relation. Soils of Jhum cultivation in Churachandpur District were strongly acidic in reaction (4.10 to 5.38) and heavy in texture. The soils were rich in Organic Carbon (0.327 to 3.00%) and low in Electrical Conductivity (0.060 to 0.517 dSm-1). The distribution of DTPA-Fe were very high ranging from 15.403 to 81.897 mg kg-1, DTPA-Cu were medium to high ranging from 0.55 to 2.10 mg kg-1, DTPA-Mn were medium to very high ranging from 6.333 to 60.367 mg kg-1 and DTPA-Zn were very low to high ranging from 0.203 to 1.9 mg kg-1. pH under terrace cultivation from Senapati district were strongly acidic in reaction (4.62 to 5.38) and heavy in texture and rich in organic carbon (0.55 to 3.20%) and low in electrical conductivity (0.063 to 0.183 dSm-1). Under terrace cultivation distribution of DTPA-Fe were very high ranging from 35.790 to 79.320 mg kg-1, DTPA-Cu were medium to high ranging from 0.680 to 2.930 mg kg-1, DTPA-Mn were medium to very high ranging from 5.900 to 48.933 mg kg-1 and DTPA-Zn were very low to medium ranging from 0.200 to 2.397 mg kg-1. DTPA-extractable micronutrients showed positive correlation with pH and EC under Jhum cultivation and in Terrace cultivation DTPA-extractable micronutrients showed positive correlation with pH except Fe. However, there is irregular pattern of correlation among the micronutrients under different land use systems. The surface horizon contains sufficient amount of DTPA-extractable micronutrients except Zinc. Therefore, Zinc fertilization may be an option for better crop production.
Key words: Micronutrients, Zn deficiency, JHUM, Terrace.
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