Assessment and Mapping of Micronutrient Cation Distribution in Agricultural Research Station Soil: A Geospatial Approach

Aim: The objective was to construct fertility maps of the area, specifically focusing on micronutrient cations. The research aims to provide valuable insights into the spatial distribution of micronutrients, aiding in the development of targeted agricultural practices and informed decision-making. Study Design:  Soil sampling, soil analysis and soil mapping. Place and Duration of Study: Agricultural Research Station, Ummedganj-Kota in 2019 and 2020 Methodology: The study involved the collection of 300 soil samples, with precise coordinate’s locked using GPS technology. Soil variability maps   for soil micronutrient Zn,Fe, Mn and Cu were generated by using Arc GIS 10.5 on the basis of  latitude and longitude of sample site by using hand GPS device and analyzed sample data.  Results: The available-Zn of the soils ranged from 0.03 to 4.39 mg kg-1 with a mean value 0.61 mg kg-1, the soil falls under low (64.67%) to medium (30.33%) in available Zn. The available-Fe of the soils ranged from 1.09 to 12.54 mg kg-1 with a mean value 4.29 mg kg-1, the soils fall under low (58.00%) and medium (31.67%) categories for available Fe. The available-Mn of the soils ranged from 2.27-22.31 mg kg-1 with a mean value 5.74 mg kg-1, the soils of the farm falls under medium (28.33%) to high (69.34%) in available Mn. The available-Cu of the soils ranged from 0.32-2.25 mg kg-1 with a mean value 1.09 mg kg-1, the soil comes under high (57.00%) and very high (30.33%) categories for available Cu. Conclusion: Spatial variability map it was found that a high amount of Zn, Mn, Fe present in the soil of field number 14 and 12A compared to other fields. The possible cause behind this may be due to adoption of organic farming practices in field number 14 and execution of integrated farming system modules in field number 12A from some year

Effect of Integrated Nutrient Management on Soil Health and Nutrient Balance Sheet of Soybean under Vertisols of Rajasthan

  Background: A field experiment was conducted during kharif, 2019 at ARS farm, College of Agriculture, Ummedganj, Kota (Rajasthan). Effect of Integrated Nutrient Management on Soil Health and Nutrient Balance Sheet of soybean Under Vertisols of Rajasthan. The soil of the experimental field is clay loam having low to medium fertility status and good porosity. Method: The experiment consisted of 10 treatments viz. T0 - Control (Absolute), T1 - RDF (20-40-40), T2 - 75% RDF + FYM (2.0 t ha-1), T3 - 50% RDF + FYM (4.0 t ha-1), T4 - 75% RDF + FYM (2.0 t ha-1) + Rhizobium, T5 - 50% RDF + FYM (4.0 t ha-1) + Rhizobium, T6 - 75% RDF + Vermicompost (1.0 t ha-1), T7 - 50% RDF + Vermicompost (2.0 t ha-1), T8 - 75% RDF + Vermicompost (1.0 t ha-1) + Rhizobium, T9 - 50% RDF + Vermicompost (2.0 t ha-1) + Rhizobium. The experiment was laid out in randomised block design and was replicated thrice. Result: Among the nutrient management treatment, application of 50% RDF + Vermicompost (2.0 t ha-1) + Rhizobium (T9) significantly built up of the soil available nitrogen (258 kg ha-1), available phosphorus (21.67 kg ha-1) and available potassium (445.35 kg ha-1), micronutrient and organic carbon (0.59) was recorded.      &nbsp