Soil Resources Mapping of Sabour Block of Bhagalpur District, Bihar
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Date
2020
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Department of Soil Science (Agril. Chemistry), BAU, Sabour
Abstract
The present study entitled “Soil Resources Mapping of Sabour block of Bhagalpur district, Bihar” represented the soil fertility status and Land Capability Classification.
Soil profiles viz. P1, P2, P3 and P4 predominantly were taxonomically observed in three orders namely, Entisols, Inceptisols and Vertisols under investigation and varied from sandy loam in Diara land to clay in Tal land. However, textural class as clay loam was found in agricultural land followed by silt loam under horticultural land.
In context of soil fertility, the soil pH of the study area ranged from 6.5 to 8.53 (mean value of 7.52) and 90 per cent of the soil samples categorized under neutral range. The electrical conductivity (EC) varied from 0.10 to 0.160 dSm-1 which comes under almost non saline in nature. The calcium carbonate content in soil ranged from non- calcareous (0.5-1.0 %) to calcareous (>10 %). The range of organic carbon was observed medium (2.05), available nitrogen was low (1.09), available phosphorus was medium (2.11) and available potassium was high (2.70).
However, The DTPA Iron content of the study area was very high and sufficient in Copper and Manganese content. But, Zinc deficiency was observed in all Panchayats. In this context, the availability of Copper, Iron, Manganese and Zinc were seen to be decreased with growing pH values.
In context of land capability class, the study was placed under class IIIw in Tal and Diara lands which are assessed under flood and water logging during monsoon. However, agricultural land and horticultural lands put under class III followed by class IV.
The present investigation helped how to trace out the actual agricultural land out of the total geographical area under RS-GIS domain that dealt the actual mapping for soil fertility status up to block and panchayat level which may be helpful for the management of agricultural land under cereals, pulses, oilseeds and vegetables crops. In view of analyzed facts, maps over soil fertility status may be also helpful towards refinement of the supply chain of the nitrogenous fertilizers.