Vol. 11, Issue 12 (2022)

Author(s):
Anusree T and Dr. Durga Devi KM

Abstract:
The acidity characteristics of northern Kole land of Thrissur district in Kerala were studied in detail by collecting the soil samples at 0-30 depth from 10 locations in Pavutai padashekharam of Mullasseri block. The soils were strongly acidic with a pH range of 5.22 to 5.59 with an average of 5.42. The potential acidity was relatively high and ranged from 21.24 to 35.01 meq 100 g^-1 followed by pH dependent acidity (19.79-32.19 meq 100 g^-1) whereas the exchangeable acidity ranged between 1.28-2.82 meq 100 g^-1. The pH dependent acidity was contributing in larger proportions toward total potential acidity (87.9-97.5%) whereas exchangeable acidity contributes slightly (4.3-9.09%). The exchangeable acidity was dominantly contributed by exchangeable Al and less contributed by exchangeable H⁺. Active acidity represented least portion of the soil acidity and ranged between 4.4–5.07 pH. For acidity management, it is relevant to consider all the forms of acidity.