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Response of subterranean clover to liming and phosphate fertilization on a low potassium soil
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Wooldridge --- , Republic of South Africa R.E. Harris --- , Republic of South AfricaSeveral Trifolium varieties grown in an acid Bokkeveld shale soil responded positively to small additions of lime and P. Growth was probably limited by a K deficiency, and it is unlikely that Trifolium species could be successfully grown as cover... -
The role of temperature in the germination of subterranean and aerial seeds of Commelina benghalensis L.
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: M.I. Ferreira --- , Republic of South Africa C.F. Reinhardt --- Department of Plant Production and Soil Science, Republic of South AfricaInformation on the temperature requirements for germination of weed seeds can be used to predict the soil temperature required for weed emergence. The germination behaviour of the two types of mature C. benghalensis seeds, ie. subterranean and aerial, were studied... -
Research Note: The use of Lolium multiflorum and uninoculated Trifolium subterraneum as reference crops in nitrogen fixation studies
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: M. Trytsman --- Agricultural Research Council, Republic of South Africa W.D. Stock --- Department of Botany, Republic of South Africa C.J. Otto --- Agricultural Research Council, Republic of South AfricaThe 15N natural abundance and15 N dilution methods were used to determine the viability of using either Lolium multiflorum (annual ryegrass) or uninoculated Trifolium subterraneum (subterranean clover), as non‐fixing reference crops in N2‐fixation studies. The δ13N values for the15 N... -
Status update of the endemic and critically endangered cave catfish Clarias cavernicola Trewavas 1936, from the Aigamas Cave system, Namibia
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: FJ Jacobs --- , Namibia PG Jacobs --- , CJ Hay --- , Namibia TF Naesje --- , NorwayKnowledge of population sizes of threatened fish species is essential for formulation and implementation of effective conservation and management policies. Visual counts (VC) from two SCUBA diving expeditions during February and May 2019 were used to estimate the population size... -
Observations on the breeding biology of D’Arnaud’s Barbet Trachyphonus darnaudii
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Henrik Brumm --- Max Planck Institute for Ornithology, Germany Poyo Makomba --- , Tanzania Wolfgang Goymann --- , TanzaniaBreeding behaviour is a key process for avian fitness and evolution, but the basic natural histories of many species are unknown. We studied the breeding biology of D’Arnaud’s Barbet Trachyphonus darnaudii (family Lybiidae) on the Usangu Plains in southwestern Tanzania...