Research note

Die Invloed van Bemesting op die Groei van Jong Pinus radiata, in Potte met Twee Tipiese Bosbougronde van die Wes-Kaap

Published in: South African Forestry Journal
Volume 172, issue 1, 1995, pages: 7–12
DOI: 10.1080/00382167.1995.9629860
Author(s): J.W. CrousFakulteit Bosbou,, F. EllisFakulteit Bosbou,, J.M. TheronFakulteit Bosbou,

Abstract

The effects of N, P and K on Pinus radiata were investigated by growing plants in pots filled with two typical forest soils in the Western Cape. Significant interactions were found. On soil A, a coarse sand from Grabouw, no significant growth response was obtained without the application of nitrogen. Simultaneous application of nitrogen and phosphate improved growth but led to a potassium deficiency in some plants. When N, P and K were applied, a manganese deficiency developed in some plants. On soil B, a medium sandy loam from Jonkershoek, phosphate deficiencies occurred which were not corrected by the application of phosphate. There was no significant growth response with N and K application on this soil. The limitations of a pot trial prevents the direct extrapolation of results to field conditions.

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