Kaliumvaslegging in 'n Arcadia-grond: I. Vaslegging onder natuurlike toestande

Potassium fixation in an Arcadia soil: I. Fixation under field conditions. In order to determine the extent of potassium fixation in a soil of the Arcadia series, samples were taken from experimental plots that received different amounts of potassium over a period of 12 years. The samples were analy...

Full description

Published in: South African journal of plant and soil Vol. 4; no. 4; pp. 180 - 182
Main Author: Steenkamp, C.J., Theron, A.A. and De Bruyn, J.A.
Format: Journal Article
Language: Afrikaans
Published: Taylor & Francis 11-01-1987
Subjects:
Online Access: Get full text
Summary: Potassium fixation in an Arcadia soil: I. Fixation under field conditions. In order to determine the extent of potassium fixation in a soil of the Arcadia series, samples were taken from experimental plots that received different amounts of potassium over a period of 12 years. The samples were analyzed for total, and exchangeable plus soluble potassium. Soil which annually received two applications of 1000 kg KCI ha-1 fixed a maximum of 4% of the applied potassium. Where small amounts of potassium were applied, potassium was released from the non-exchangeable pool. The little fixation that may take place under field conditions can safely be ignored. The results also indicate that the loss of potassium due to leaching by far exceeded the amount that may have been fixed.
ISSN: 0257-1862
2167-034X