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Organic and mineral fertilizer field trial on rooibos tea under Northern Cape climatic conditions
(Stellenbosch : Stellenbosch University, 2019-04)
ENGLISH ABSTRACT: Prior to this study there was little or no information regarding fertilizer recommendations for cultivated rooibos tea under Northern Cape growing conditions. The first aim of the study was to examine the ...
Improving phosphate fertilizer recommendations using soil phosphorus buffer capacity and evaluation of various P extraction tests on a variety of South-African soils
(Stellenbosch : Stellenbosch University, 2019-04)
ENGLISH ABSTRACT: Phosphorus (P) fertiliser recommendations are based on extractable P levels as measured by a variety of extraction tests and should incorporate factors such as depth, bulk density and the soils phosphorus ...