The Availability Of Potassium In Some Kenya Soils

Loading...
Thumbnail Image
Date
1974
Authors
Kenya Soil Survey
Journal Title
Journal ISSN
Volume Title
Publisher
kenya Soil Survey
Abstract
Potassium is present in soil in substantially smaller quantities than calcium and magnesium, but it is absorbed by plants in larger amounts than other cations. Apart from the potassium applied by foliar sprays, potassium required by plants is taken up from the soil by roots. Different mechanisms by which the potassium required by the plant root is conveyed to the root surface have been proposed. According to Barber (1972, in SChroeder, 1974) three mechanisms are involved in the X-supply to the plant roots, root interception, in which the growing root comes into contact with the available potassium, mass flow by which potassium is tran~rted with the flowing water .to the root surface, and diffusion of potassium in the soil solution to the root surface along a concentration gradient.
Description
Keywords
Citation
Collections