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.com
Volume 6, Issue 4 (Suppl)
Agrotechnology, an open access journal
ISSN: 2168-9881
Agri 2017
October 02-04, 2017
allied
academies
10
th
International Conference on
AGRICULTURE & HORTICULTURE
October 02-04, 2017 London, UK
Forms and distribution of soil potassium in selected maize growing areas of Haveri district
Harsha B R
University of Agricultural Sciences, Dharwad, India
P
otassium, the third major nutrient, exists in soil in different forms and these forms are in a state of quasi-equilibrium with
each other. These different forms of potassium and their distribution were studied in 20 representative red and black soil
types spreading over seven taluks of the Haveri district of Karnataka. Soils were generally sandy clay loam to clay in texture.
The soil reaction ranged between slightly acidic and near neutral in reaction and electrical conductivity was well within the
permissible limit. The OC was low to medium. The average CEC, potassium adsorption ratio, sum of exchangeable cations
and available potassium of black soils was high compared to red soils at both the depths. The average value of exchangeable
potassium percentage was high in red soils at both the depths. Results indicated that the all the forms of potassium was higher
in black soils compared to red soils. The water soluble and exchangeable K was higher in surface sample than in the sub surface
in both the soil type. Whereas, non-exchangeable, lattice and total K was higher in sub surface than the surface in both the
soil types. The water soluble form of K showed a significant and positive correlation with sand in red (r=0.755*) and black
(r=0.527*) soils. The exchangeable K was significantly and positively correlated with CEC (r=0.721* and r=0.807* in red and
black soils, respectively whereas, non-exchangeable K, lattice K and total K showed positive correlation for clay.
harshaaditya123@gmail.comAgrotechnology 2017, 6:4(Suppl)
DOI: 10.4172/2168-9881-C1-028