Vol. 11, Issue 9 (2022)

Author(s):
Ruparna, Vinay Bachkaiya, Dr. Rakesh Banwasi and Dipti Bhagat

Abstract:
A field study was conducted to investigate the Assessment of potassium fractions as influenced by varying level of K mineral in an Inceptisol of Chhattisgarh plain at research cum instructional farm of IGKV, Raipur (C.G.) during the Kharif season of 2021. The result of investigation revealed that amount of potassium fractions viz available K, water soluble K and exchangeable K were higher in surface layer (0-15 cm) than that in subsurface soil depth (15-30 cm), (30-45 cm), (45-60 cm) and available, water soluble and exchangeable K was decreased with increase in soil depth. The non-exchangeable K and total K was found higher in subsurface layer than that in surface layer and increased with increase in depth. The application of RDF + K mineral @ 210 kg ha-1 recorded significantly higher amount of water soluble K (0-15 cm) (15-30 cm) and available K (0-15 cm). However both water soluble and available K at 15-30 cm 30-45 cm register at par values in all the treatments. The content of exchangeable K was found to be decreased with increasing soil depth. The exchangeable K was not affected significantly due to varying level of K mineral + RDF. The non-exchangeable and total K were found to be increased as soil depth increased and highest amount was recorded at 45-60 cm. There was no effect of application of RDF + K mineral on content of non-exchangeable and total K. The forms of potassium were in dynamic equilibrium and there amount follows the order non-exchangeable K > exchangeable K > available K > water soluble K >. All the forms of potassium show positive correlation with each other and available potassium is significantly and positively correlated with water soluble (r=0.612), exchangeable K (r=0.459) and non-exchangeable K (r=0.508).