PHYSICO-CHEMICAL PROPERTIES AND DIFFERENT POTASSIUM FRACTION FROM SOIL OF NORTH GUJARAT REGION

R.U. NIMBALKAR¹, S.K. GHODKE²*, K.C. OMBASE³, V.R. PATEL^4
1Central Sugarcane Research Station, Padegaon, 415521, Phaltan, Mahatma Phule Krishi Vidyapeeth, Rahuri, 413722, M.S., India
²Central Sugarcane Research Station, Padegaon, 415521, Phaltan, Mahatma Phule Krishi Vidyapeeth, Rahuri, 413722, M.S., India
³Central Sugarcane Research Station, Padegaon, 415521, Phaltan, Mahatma Phule Krishi Vidyapeeth, Rahuri, 413722, M.S., India
⁴Department of Soil Science and Agricultural Chemistry, Chimanbhai Patel College of Agriculture, Sardarkrushinagar Dantiwada Agricultural University, Sardarkrushinagar, 385506, Gujarat, India
* Corresponding Author : ghodkesk18@gmail.com

Received : 21-07-2023     Accepted : 28-08-2023     Published : 30-08-2023
Volume : 15     Issue : 8       Pages : 12610 - 12612
Int J Agr Sci 15.8 (2023):12610-12612

Keywords : Potassium fractions, Physico-chemical properties, North Gujarat soil
Academic Editor : Dr Kamal Kant
Conflict of Interest : None declared
Acknowledgements/Funding : Authors are thankful to Central Sugarcane Research Station, Padegaon, 415521, Phaltan, Mahatma Phule Krishi Vidyapeeth, Rahuri, 413722, M.S., India and Department of Soil Science and Agricultural Chemistry, Chimanbhai Patel College of Agriculture, Sardarkrushinagar Dantiwada Agricultural University, Sardarkrushinagar, 385506, Gujarat, India
Author Contribution : All authors equally contributed

A soil survey of north Gujarat region was undertaken to know the status of available nutrients, chemical properties and fractionation of potassium in soils of seven district of North Gujarat. Total 305 representative surface soil samples were collected from farmer’s fields during April-2016 using multistage stratified random sampling. The soil samples were analyzed for available physico-chemical properties and fractions of potassium adopting standard analytical procedures. Soils of North Gujarat region are slightly acidic to basic in reaction with pH varied from 6.3 to 9.15 with mean value 7.86. EC range from 0.6 to 1.67 dS m-1 with mean value 0.49. The organic carbon content was 0.25 to 8.90 g kg-1 with mean 3.81 g kg-1, the calcium carbonate content was 2.5 to 182.5 g kg-1 with mean 25.93 g kg-1. As regards available nutrients viz; available N (27.93 to 209.44 mg kg-1) with mean 95.32 mg kg-1, available P (6.61 to 52.93 mg kg-1) with mean 21.71 mg kg-1, available K (47.86 to 430.85 mg kg-1) with mean 158.89 mg kg-1, available S (5.35 to 73.15 mg kg-1) with mean 22.44 mg kg-1. The sand, silt and clay content in the soil varied from (50 to 95 %) with mean 86.27 %, (2.50 to 37.50 %) with mean6.67 % and (2.50 to 30 %) with mean 7.14 % respectively. The soils were having high sand content indicating that the soils were loamy sand in texture. The water soluble K content in the soil samples varied from 1.50 to 24.33 mg kg-1 with a mean value of 5.38 mg kg-1, nitric acid soluble K range from 114 to 888 mg kg-1 with a mean 408.53 mg kg-1, exchangeable K range from 33.80 to 422.17 mg kg-1 with mean 153.21 mg kg-1, reserve K range from 2.40 to 776.27 mg kg-1 with a mean 249.94 mg kg-1 and total k range from 1004 to 5061 mg kg-1 with a mean of 1945.74 mg kg-1. The total k content in soils vary from 1753.73 mg kg-1 (Aravali) to 2468.69 mg kg-1 (Patan). The water-soluble K content in soils range from 3.01 mg kg-1 (Sabarkantha) to 8.84 mg kg-1 (Mehsana) and contribute 0.28 per cent towards the total k content of soils of North Gujarat region. Nitric acid soluble k content in soils range from 357.71 mg kg-1 (Banaskantha) to 446.89 mg kg-1 (Patan) and contributed 21.17 per cent towards the total k. Exchangeable K content in soils range from 130.83 mg kg-1 (Banaskantha) to 179.55 mg kg-1 (Sabarkantha) and contributed 7.92 per cent of total K. Reserve K content range from 220.11 mg kg-1 (Banaskantha) to 273.01 mg kg-1 (Aravalli) and contributed 12.96 per cent towards total K

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