Study on Soil Nutrient Status According to Global Positioning System in Different Blocks of Birbhum District of West Bengal
Subrata Mandal *
Rathindra Krishi Vigyan Kendra, Institute of Agriculture, Visva-Bharati, Sriniketan, Birbhum, West Bengal, India.
Mrinmoy Karmakar
Rathindra Krishi Vigyan Kendra, Institute of Agriculture, Visva-Bharati, Sriniketan, Birbhum, West Bengal, India.
F. H. Rahman
ICAR-Agricultural Technology Application Research Institute Kolkata, Bhumi Vihar Complex, Salt Lake, Kolkata-700097, India.
*Author to whom correspondence should be addressed.
Abstract
A GPS based soil sampling and testing was done in 10 blocks of Birbhum district under monitoring of Rathindra Krishi Vigyan Kendra, Birbhum during 2018 and 2019. In this regard, some soil chemical properties were analysed through Mridaparikshak (soil testing kit). After statistical analysis, pooled data of different soil nutrients were compared based on GPS to prepare a data base for easy fertiliser recommendation of different crops without soil testing. It was found that soil pH (6.29 to 5.50), soil O.C (0.77 to 0.31%), available K (292.12 to 226.60 kg/ha), available B (0.81 to 0.17 mg/kg) and available Fe (44.4 to 21.5 mg/kg) had been decreased with the increase in latitude from 23°04' 07.4500" to 24°11' 15.3400" and longitude. Recommendation of more liming, organic manure, K, B may be done accordingly. On the other hand, available N (184.0 to 296.95 kg/ha), available P (15.05 to 62.76 kg/ha), available S (11.43 to 44.52 kg/ha) and available Zn (0.20 to 1.04 mg/kg) showed sharp direct relation with the increase in Latitude as supported by higher CV value.
Keywords: GPS, soil analysis, soil nutrients, CV, Birbhum