Rakesh Kumar Choudhary & Dileep Kumar*
University Department of Zoology, Patna University, Patna, Bihar, India
Received : 16th February, 2025 ; Revised : 17th March, 2025
DOI:-https://doi.org/10.5281/zenodo.16787948
Abstract– The present study investigated the flooded soil biota and its agricultural chemistry in Samastipur district of Bihar. Soil samples were collected from five villages across three blocks at two depths: 0-15 cm and 15-30 cm. A total of 14 samples were collected from different fields before the flood, during April and May, 2022. The diversity of soil fauna was studied on the basis of soil texture. The majority of soil fauna were categorized into groups such as nematodes, annelids, arthropods, and molluscs. Arthropods, including insects, collembolans, mites, and acari, were found to be dominant. The pH ranged from 7.52 to 8.88 (avg. 8.20); electrical conductivity from 0.168 to 1.456 dS/m (avg. 0.812); organic carbon content from 0.40% to 0.84% (avg. 0.62%), nitrogen ranged from 192.00 – 310.72 kg ha-1 (avg. 251.30), phosphorus ranged from 12.00 – 207.00 kg ha-1 (avg. 109.5), potassium ranged from 89.20 – 458.00 kg ha-1 (avg. 273.4), boron ranged from 0.12 – 0.59 ppm (avg. 0.355), similarly sulphur ranged from 7.76 – 294 ppm (avg. 150.88), zinc ranged from 0.156 – 1.262 ppm (avg. 0.79), copper ranged from 0.628 – 1.434 ppm (avg. 1.031), iron ranged from 3.662 – 21.780 ppm (avg. 12.721) and manganese ranged from 0.890 – 5.696 ppm (avg. 3.293). The electrical conductivity was found to be suitable for plant growth, and the soil pH was alkaline. Levels of nitrogen, phosphorus, potassium, and sulphur were low to medium. The level of boron was low in sample soil. The results indicated that the soil was moderately nutrient-rich, and farmers were advised to adopt nutrient management practices based on soil health card recommendations.
Keywords: Soilfauna, Electrical conductivity, pH, Micronutrients, Samastipur
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