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Effect of cutting frequency on the yield and quality of legumes and grasses under irrigation
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J M Van Heerden --- Department of Agriculture and Water Supply (Winter Rainfall Region),Four pasture legumes and seven grasses were subjected to a range of cutting frequencies during the 1980/81 season. A wide range of responses emerged, judged by both the dry matter and TDN yield responses of the different species. Whereas two... -
Production of pasture species in the winter rainfall region: Simulation of dry matter production
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.M. Vanheerden --- Department of Agriculture & Water Supply (Winter Rainfall Region), N.M. Tainton --- Department of Grassland Science,Production data derived from cutting trials undertaken at a number of sites in the Winter Rainfall Region were used to derive equations for the prediction of the yield of a number of pasture species. Inputs into the models include climatic... -
Influence of grazing management on the production of an irrigated grass/legume pasture in the Rûens area of the Southern cape
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.M. vanHeerden --- Department of Agriculture and Water Supply (Winter Rainfall Region), N.M. Tainton --- Department of Grassland Science,The production of an irrigated grass/legume pasture was determined using Merino ewes on rotational and continuous grazing systems. The clover content of the pasture declined, while the grass content increased under both systems. The lucerne content of the rotationally‐grazed pastures... -
Seasonal grazing capacity of an irrigated grass/legume pasture in the Rûens area of the southern Cape
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.M. van Heerden --- Department of Agriculture & Water Supply (Winter Rainfall Region), Republic of South Africa N.M. Tainton --- Department of Grassland Science, Republic of South AfricaSeasonal changes in grazing capacity of an irrigated grass/legume mixture consisting of lucerne, red clover, white clover, tall fescue, cocksfoot and perennial ryegrass were determined in the Rûens area of the southern Cape. Applying variable stocking rates and three grazing... -
A comparison of grass and grass/legume pastures under irrigation in the Outeniqua area of the southern Cape
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: J.M. van Heerden --- Department of Agriculture & Water Supply (Winter Rainfall Region), Republic of South Africa N.M. Tainton --- Department of Grassland Science, Republic of South Africa P.R. Botha --- Department of Agriculture & Water Supply (Winter Rainfall Region), Republic of South AfricaTwo grass and five grass/legume pastures were evaluated over a period of two seasons at two seasonally set grazing pressures and under two grazing management systems, involving five and seven paddocks per flock and a seven‐day period of stay. Grazing... -
Nitrogen fixation of annual temperate clover species determined by the nitrogen difference method
Item type: Journal Article • Journal: Journal of the Grassland Society of Southern Africa • Authors: M. van den Berg --- , Republic of South Africa J.H.F. Meyer --- , Republic of South Africa J.M.P. Geerthsen --- , Republic of South AfricaThe nitrogen fixation ability of Trifolium vesiculosum cv. Amclo and Trifolium subterraneum cv. Mount Barker in pure and mixed stands with Lolium multiflorum cv. Midmar were compared using the nitrogen difference method (NDM). The percentage and quantity of apparent legume‐derived... -
The influence of lime and phosphorus on the growth of white clover on highly weathered Natal soils
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: N. Miles --- , P.E. Bartholomew --- , C.I. Macdonald --- ,Results of field studies conducted on highly weathered Natal soils in which the performance of white clover (Trifolium repens cv. Regal ladino) was examined under a range of lime and P treatments applied in factorial combination, are presented. Despite adverse... -
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 effects of strategic nitrogen fertiliser application during the cool season on perennial ryegrass-white clover pastures in the Western Cape Province 1. Soil nitrogen dynamics
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Labuschagne --- , South Africa M.B. Hardy --- Department of Agriculture Western Cape, South Africa G.A. Agenbag --- , South AfricaThe dynamics of soil inorganic-N in reaction to a single, strategic application of fertiliser N were studied during the period 2000 to 2002 in an Oakleaf soil with a clay content increasing from 10 to 30.8% with depth. Soil inorganic-N... -
The effects of strategic nitrogen fertiliser application during the cool season on perennial ryegrass-white clover pastures in the Western Cape Province 2. Dry matter production
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Labuschagne --- , South Africa M.B. Hardy --- Department of Agriculture Western Cape, South Africa G.A. Agenbag --- , South AfricaThe response of an irrigated perennial ryegrass-white clover pasture to fertiliser nitrogen application rates of 0, 50, 100 and 150 kg N ha−1 applied in either autumn, early winter, late winter, early spring or late spring was investigated over a... -
The effects of strategic nitrogen fertiliser application during the cool season on perennial ryegrass-white clover pastures in the Western Cape Province 3. Clover content
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: J. Labuschagne --- , South Africa M.B. Hardy --- Department of Agriculture Western Cape, South Africa G.A. Agenbag --- , South AfricaThe influence of a single application of fertiliser N (0, 50, 100 and 150 kg N ha−1) applied in either autumn, early winter, late winter, early spring or late spring on the grass-clover balance in a perennial ryegrass-white clover pasture... -
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... -
Nodulation potential of four Trifolium repens cultivars under field conditions
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: PA Swanepoel --- Department of Agriculture: Western Cape, South Africa PR Botha --- Department of Agriculture: Western Cape, South Africa W Truter --- , South Africa AKJ Surridge-Talbot --- , South AfricaFour Trifolium repens (white clover) cultivars were evaluated under field conditions to determine the potential of these cultivars to sucessfully develop Rhizobium-associated root nodules. Nodulation of T. repens is often poor, because of suboptimal environmental conditions or absence of host-specific... -
Kikuyu over-sown with ryegrass and clover: dry matter production, botanical composition and nutritional value
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: PR Botha R Meeske HA SnymanThe seasonality of growth and low nutritional value of kikuyu (Pennisetum clandestinum) pasture restrict milk production. The aim of the study was to determine the dry matter yield, botanical composition and nutritional value of irrigated kikuyu over-sown with annual ryegrass... -
Kikuyu over-sown with ryegrass and clover: grazing capacity, milk production and milk composition
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: PR Botha R Meeske HA SnymanThe high dry matter yield of kikuyu (Pennisetum clandestinum) under favourable conditions supports high stocking rates and milk production per hectare. However, the quality of kikuyu is generally low and consequently the milk production per cow is also low. The... -
Effects of low rates of nitrogen and phosphorus fertilisers on productivity of an annual African clover, Trifolium quartinianum cultivar Mealton 5, for zero grazing in Kenyan highland smallholdings
Item type: Journal Article • Journal: African Journal of Range & Forage Science • Authors: J Muthoni LMS AkundabweniZero grazing is the cornerstone of dairying in intensively cultivated smallholdings in Kenya. The cut and carry method of forage harvesting increasingly is leading to soil mining, especially of phosphorus (P) and nitrogen (N). This problem is more serious in... -
Impact of seed burial depth on the emergence and growth of annual forage legumes
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Francuois L Müller --- Department of Biodiversity and Conservation Biology, South Africa Lincoln Raitt --- Department of Biodiversity and Conservation Biology, South Africa Lilburne Cyster --- Department of Biodiversity and Conservation Biology, South AfricaThe importance of evaluating the tolerance of forages to deeper seed burial is often overlooked. Therefore, this study evaluated the effects of increased seed burial depth on the emergence, vigour and early seedling growth of annual forage legume cultivars in... -
Effect of once-off tillage on soil water, inorganic nitrogen and glomalin contents under conservation agriculture in the Swartland sub-region of the Western Cape
Item type: Journal Article • Journal: South African Journal of Plant and Soil • Authors: Johan Labuschagne --- , South Africa Johan van Zyl --- , South Africa Gert A Agenbag --- , South Africa Izane R Crous --- , South Africa Josias E Hoffman --- , South AfricaStrategic tillage can be regarded as an important management option under conservation agriculture (CA). The effects of tillage practice and cropping sequence on volumetric water (mm mm-1), inorganic N (mg kg-1) and glomalin (mg g-1) content in the 0-300 mm...