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1. 

   The effect of reduced tillage on soil organic carbon

   Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: H. v. H. van der Watt --- Department of Soil Science, Republic of South Africa

   The organic carbon contents of the 0–15-cm and 15–30-cm layers of conventionally tilled, stubble-mulched and no-tilled soils were compared. Samples from four localities in the Transvaal and Orange Free State were analyzed for organic C by means of two methods...

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2. 

   Suppression of seed germination and early seedling growth by plantation harvest residues

   Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: A.W. Schumann --- , Republic of South Africa K.M. Little --- , Republic of South Africa N.S. Eccles --- , Republic of South Africa

   The role of forestry plantation residues (leaf and branch) in the suppression of establishment of four weed species (Conyza sumatrensis, Trifolium spp., Echinochloa utilis and Lactica sativa) was investigated. Of the three residue types used, Pinus patula residues were found...

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