Vol. 4 (5) : September-October 2013 issue
Green Farming Vol. 4 (5) : 608-610 (September-October, 2013)
Long term effect of fertilizer application on the soil properties and potassium fractions of coconut plantation in an alfisol
A.K. SREELATHA1* and N. SAIFUDEEN2
College of Agriculture (Kerala Agricultural University), Vellayani, Thiruvananthapuram - 695 522 (Kerala)
Designation : 1Asstt. Professor *(aksreelatha@yahoo.com), 2Professor & Head
Subject : Agronomy and Crop Production
Paper No. : P-0815
Total Pages : 3
Received : 20 March 2013
Revised accepted : 01 September 2013
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Citation :
A.K. SREELATHA and N. SAIFUDEEN. 2013. Long term effect of fertilizer application on the soil properties and potassium fractions of coconut plantation in an alfisol. Green Farming Vol. 4 (5) : 608-610 ; September-October, 2013
ABSTRACT
Soil samples from the root zone of 25 year old coconut palms from a long term fertilizer experiment were analysed for various soil chemical constituents including fractions of potassium. Treatment effects on the yield at 25th and 26th year as well as the above parameters were analysed statistically. Fertilized plots revealed higher acidity and significant changes in cationic environment. Application of potassium resulted in higher concentration of water soluble K, available K, exchangeable K, HNO3-K and total K. Content of non exchangeable K was reduced. Significant yield response was noticed even after 25 years of continuous potassium fertilisation.
Key words :
Cationic equilibrium, Coconut, Long term fertilizer experiment, Neyyattinkara series, Potassium dynamics, Potassium fractions, Soil acidity.
