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.
The field experiments were conducted to study effect of zinc (Zn) application on growth, yield, Zn uptake and Zn use indices of lentil (Lens culinaris or Lens esculanta) during rabi (October to March) seasons 2016 and 2017 in red and lateritic soil of West Bengal, India. There were two main plot treatments i.e., crop establishment methods (zero tillage and conventional tillage) and seven sub-plot treatments i.e. levels of Zn and methods of application (seed coating @ 0.6% ZnSO4.7H2O, 1.2% ZnSO4.7H2O and 1.8% ZnSO4.7H2O, two foliar sprays @ 0.5% ZnSO4.7H2O, three foliar sprays @ 0.5% ZnSO4.7H2O, seed coating @ 1.2% ZnSO4.7H2O+two foliar sprays @ 0.5% ZnSO4.7H2O and control were laid out in split plot design replicated thrice. The crop establishment methods did not show any significant influence on growth, yield and nutrient uptake by lentil. However, among the levels of Zn and methods of application, seed coating @ 1.8% ZnSO4.7H2O produced significantly taller plants, more leaf area index, dry matter accumulation and yield. Regarding Zn concentration, combination of seed coating and foliar application @ 1.2% ZnSO4.7H2O+two foliar sprays @ 0.5% ZnSO4.7H2O resulted in significantly higher concentration than other treatments. Zn use efficiency was significantly higher (seed coating @ 1.2% ZnSO4.7H2O for agronomic efficiency and physiological efficiency, seed coating @ 0.6% ZnSO4.7H2O for partial factor productivity and seed coating @ 1.8% ZnSO4.7H2O for apparent Zn recovery) as compared to that of foliar application or combined application of seed coating and foliar spray.
Oat is one of the important fodder crops widely grown during winter season for grain purpose as well as green fodder in different parts of the World. The experiment was conducted during rabi seasons of 2014-15 and 2015-16 at Agricultural research farm, Institute of Agriculture (Palli Siksha Bhavana), Sriniketan, West Bengal, India for studying the effect of nutrient solublizers combination with on growth, productivity and economics on grain oat. The treatments consists of eleven treatments including absolute control viz.,
A field experiment was conducted during kharif season of 2012 and 2013 at agricultural research farm, Palli Siksha Bhavana (Institute of Agriculture), Visva-Bharati, Sriniketan, West Bengal to study the effect of crop geometry and nutrient management in baby corn and cowpea (fodder) intercropping system on growth, productivity and competition functions of intercropping systems. The experiment was laid out in randomized block design having twelve treatments with each treatment replicated thrice. Higher number of corns ha-1 , baby corn yield and green fodder yield of baby corn and cowpea were found in sole crop of baby corn and cowpea. This was significantly higher than various intercropping systems. Total green fodder yield from different intercropping systems was higher than sole cowpea but lower than sole baby corn. The treatment having 3:1 row ratio of baby corn and cowpea 100% NPK of base crop+75% PK of intercrop exhibited significantly higher total fodder yield over sole crop of cowpea and lower than sole crop of baby corn. Baby corn+cowpea (fodder) at 2:2 row ratio with 100% NPK of base crop+75% PK of intercrop exhibited the highest LER, monetary advantage (MA) and Area-time equivalent ratio (ATER) followed by baby corn+cowpea (2:1) with 100% NPK of base crop+75% PK or 50% PK of intercrop. However, the highest Relative Value Total (RVT) and Aggressivity (A) was recorded in 3:1 row ratio of baby corn and cowpea with 100% NPK of base crop+75% PK of intercrop and with 100% NPK of base crop+25% PK of intercrop respectively. The Relative Crowding Coefficient (RCC) was observed in 2:1 row ratio of ratio of baby corn and cowpea with 100% NPK of base crop+75% PK of intercrop.
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