Effect of cattle and sheep grazing on the structure of Highland Sourveld swards in South Africa

Tropical Grasslands

Volumn 33, Issue 2, 1999, Pages 111-121

  Morris, C D ^a   Derry, J F ^a   Hardy, M B ^a  

^a NONE

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0033379420     PISSN: 00494763     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Article

References (53)

1. ACOCKS, J.P.H. (1988) Veld types of South Africa. Memoirs of the Botanical Survey of South Africa, 57. (Botanical Research Institute: Pretoria).
2. AGHA, M. and IBRAHIM, M.T. (1984) Algorithm AS203. Maximum likelihood estimation of mixtures of distributions. Applied Statistics, 33, 327-332.
3. ALLDEN, W.G. and WHITTAKER, I.A.MCD. (1970) The determinants of herbage intake by grazing sheep: the interrelationship of factors influencing herbage intake and availability. Australian Journal of Agricultural Research, 21, 755-766.
4. BAILEY, D.W. (1995) Daily selection of feeding areas by cattle in homogenous and heterogeneous environments. Applied Animal Behaviour Science, 45, 183-200.
5. BARNES, D.L. (1992) A critical analysis of veld management recommendations for sourveld in the south-eastern Transvaal. Journal of the Grassland Society of Southern Africa, 9, 126-134.
6. BARNES, D.L. and DEMPSEY, C.P. (1992) Influence of deferment before stocking spring-burnt sourveld on sheep performance and veld productivity. Journal of the Grassland Society of Southern Africa, 9, 149-157.
7. BRADBURY, J.W., VEHRENCAMP, S.L., CLIFTON, K.E. and CLIFTON, L.M. (1996) The relationship between bite rate and local forage abundance in wild Thomson's gazelles. Ecology, 77, 2237-2255.
8. BRANSBY, D.I. (1978) A study of short term grazing patterns on Coastcross II under different grazing regimes. Proceedings of the Grassland Society of Southern Africa, 13, 53-57.
9. BRANSBY, D.I. and TAINTON, N.M. (1977) The disc pasture meter: possible applications in grazing management. Proceedings of the Grassland Society of Southern Africa, 12, 115-118.
10. BUCKLAND, S.T., ANDERSON, D.R., BURNHAM, K.P. and LAAKE, J.L. (1993) Distance sampling: Estimating abundance of biological populations. (Chapman & Hall: London).
11. CHACON, E.A., STOBBS, T.H. and DALE, M.B. (1978) Influence of sward characteristics on grazing behaviour and growth of Hereford steers grazing tropical grass pastures. Australian Journal of Agricultural Research, 29, 89-102.
12. COOK, C.W., HARRIS, L.E. and YOUNG, M.C. (1967) Botanical and nutritive content of diets of cattle and sheep under single and common use of mountain range. Journal of Animal Science, 26, 1169-1174.
13. DANCKWERTS, J.E. and TROLLOPE, W.S.W. (1980) Assessment of the disc pasture meter on natural veld in the False Thornveld of the Eastern Province. Proceedings of the Grassland Society of Southern Africa, 15, 47-57.
14. DEVRIES, M.F.W. and DALEBOUDT, C. (1994) Foraging strategy of cattle in patchy grassland. Oecologia, 100, 98-106.
15. EDWARDS, P.J. (1984) Terms describing aspects of vegetation and its management. In: Tainton, N.M. (ed.) Veld and Pasture Management in South Africa. (Shuter & Shooter: Pietermaritzburg).
16. EDWARDS, G.R., PARSONS, A.J., NEWMAN, J.A. and WRIGHT, I.A. (1996) The spatial pattern of vegetation in cut and grazed grass/white clover pastures. Grass and Forage Science, 51, 219-231.
17. FULS, E.R. (1992) Semi-arid and arid rangelands: a resource under siege due to patch-selective grazing. Journal of Arid Environments, 22,191-193.
18. GIBB, M.J. and RIDOUT, M.S. (1986) The fitting of frequency distributions to height measurements on grazed swards. Grass and Forage Science, 41, 247-249.
19. GIBB, M.J. and RIDOUT, M.S. (1988) Application of double normal frequency distributions fitted to measurements of sward height. Grass and Forage Science, 43, 131-136.
20. GONG, Y., LAMBERT, M.G. and HODGSON, J. (1996) Effects of contrasting sward heights within forage species on short term ingestive behaviour of sheep and goats grazing grasses and legumes. New Zealand Journal of Agricultural Research, 39, 83-93.
21. HARDY, M.B. (1995) Short-term effects of cattle-to-sheep ratio and stocking rate on patch grazing in sour grassland. African Journal of Range and Forage Science, 12, 121-127.
22. HARDY, M.B. and MENTIS, M.T. (1986) Grazing dynamics in sour grassveld. South African Journal of Science, 82, 566-572.
23. HARDY, M.B., TAINTON, N.M. and MORRIS, C.D. (1994) Defoliation patterns of three grass species in sourveld grazed by cattle and sheep. African Journal of Range and Forage Science, 11, 37-42.
24. HARDY, M.B. and TAINTON, N.M. (1995) The effects of mixed-species grazing on the performance of cattle and sheep in Highland Sourveld. African Journal of Range and Forage Science, 12, 97-103.
25. HATCH, G.P. and TAINTON, N.M. (1990) A preliminary investigation of area-selective grazing in the Southern Tall Grassveld of Natal. Journal of the Grassland Society of Southern Africa, 7, 238-242.
26. ILLIUS, A.W., CLARK, D.A. and HODGSON, J. (1992) Discrimination and patch choice by sheep grazing grass-clover swards. Journal of Animal Ecology, 61, 183-184.
27. LACA, E.A., DISTEL, R.A., GRIGGS, T.C. and DEMMENT, M.W. (1994) Effects of canopy structure on patch depression by grazers. Ecology, 75, 706-716.
28. LÜTGE, B.U., HARDY, M.B. and HATCH, G.P. (1996) Plant and sward response to patch grazing in the Highland Sourveld. African Journal of Range and Forage Science, 13, 94-99.
29. LÜTGE, B.U., HARDY, M.B. and HATCH, G.P. (1998) Soil and sward characteristics of patches and non-patches in the Highland Sourveld of South Africa. Tropical Grasslands, 32, 64-71.
30. MACVICAR, C.N., DE VILLIERS, J.M., LOXTON, R.F., VESTER, E., LAMPBRECHTS, J.J.N., MERRYWEATHER, F.R., LE ROUX, J., VAN ROOYEN, T.H. and HARMSE, H.J.VANM. (1977) Soil Classification: a binomial system for South Africa. (Department of Agriculture and Technical Services: Pretoria).
31. MALHERBE, C.E. (1971) Die resultate van sekere skaap tot beesverhoudingsproewe op suurveld uitgevoer (The results of certain sheep to cattle ratio experiments conducted on sourveld). Proceedings of the Grassland Society of Southern Africa, 6, 69-77.
32. MENTIS, M.T. (1980) The effect of animal size and adaption on defoliation, selective defoliation, animal production and veld condition. Proceedings of the Grassland Society of Southern Africa, 15, 147-152,
33. MORRIS, C.D. and TAINTON, N.M. (1993) The effect of defoliation and competition on the regrowth of Themeda triandra and Aristida junciformis subsp. junciformis. African Journal of Range and Forage Science, 10, 124-128.
34. NOLAN, T. and CONOLLY, J. (1977) Mixed stocking by sheep and steers - a review. Herbage Abstracts, 47, 367-374.
35. O'REAGAIN, P.J. (1993) Plant structure and the acceptability of different grasses to sheep. Journal of Range Management, 46, 232-236.
36. O'REAGAIN, P.J. and TURNER, J.R. (1992) An evaluation of the empirical basis for grazing management recommendations for rangeland in southern Africa. Journal of the Grassland Society of Southern Africa, 9, 38-51.
37. O'REAGAIN, P.J. and GRAU, E.A. (1995) Sequence of species selection by cattle and sheep grazing South African sourveld. Journal of Range Management, 48, 314-321.
38. O'REAGAIN, P.J. and SCHWARTZ, J. (1995) Dietary selection and foraging strategies of animals on rangeland; Coping with spatial and temporal variability. In: Journet, M., Grenet, E., Farce, H-M., Thériez, M. and Demarquilly, C. (eds) Recent Developments in the Nutrition of Herbivores. pp. 407-423. (INRA Editions: Paris).
39. O'REAGAIN, P.J. and OWEN-SMITH, R.N. (1996) Effect of species composition and sward structure on dietary quality in cattle and sheep grazing South African sourveld. Journal of Agricultural Science, Cambridge, 127, 261-270.
40. O'REAGAIN, P.J., GOETSCH, B.C. and OWEN-SMITH, R.N. (1996) Effect of species composition and sward structure on the ingestive behaviour of cattle and sheep grazing South African sourveld. Journal of Agricultural Science, Cambridge, 127, 271-280.
41. PEDDIE, G.M., TAINTON, N.M. and HARDY, M.B. (1995) The effect of past grazing on the vigour of Themeda triandra and Tristachya leucothrix. African Journal of Range and Forage Science, 12, 111-115.
42. REYNOLDS, J., BOND, J., CARLSON, G.E., JACKSON, C., HORT, R.H. and LINDAHL, I.L. (1971) Co-grazing of sheep and cattle on an orchard grass sward. Agronomy Journal, 63, 533-536.
43. RING, C.B., NICHOLSON, R.A. and LAUNCHBAUGH, J.L. (1985) Vegetational traits of patch-grazed rangeland in West-central Kansas. Journal of Range Management, 38, 51-55.
44. SOIL SURVEY STAFF (1960) Soil classification - a comprehensive system. (7th Approximation). (US Department of Agriculture, Government Printing Office: Washington).
45. STODDART, L.A., SMITH, A.D. and BOX, T.W. (1975) Range Management. 3rd Edn. pp. 104-145. (McGraw-Hill: New York).
46. STOLTZ, C.W. and DANCKWERTS, J.E. (1990) Grass species selection patterns on rotationally-grazed Döhne sourveld during autumn and early winter. Journal of the Grassland Society of Southern Africa, 7, 92-96.
47. TAINTON, N.M. (1971) An analysis of the objectives of resting grassveld. Proceedings of the Grassland Society of Southern Africa, 6, 50-54.
48. TAINTON, N.M. (1972) The relative contribution of overstocking and selective grazing to the degeneration of tall grassveld in Natal. Proceedings of the Grassland Society of Southern Africa, 7, 39-43.
49. TAINTON, N.M. (1984) The ecology of the main grazing lands of South Africa. In: Tainton, N.M. (ed.) Veld and Pasture Management in South Africa. (Shuter & Shooter: Pietermaritzburg).
50. WANDERA, F.P. (1993) Patches in a Heteropogon contortus dominated grassland in southeast Queensland - their characteristics, probable causes, implications and potential for rehabilitation. Ph.D. Thesis. University of Queensland.
51. WILLMS, W.D., DORMAAR, J.F. and SCHAALJE, G.B. (1988) Stability of grazed patches on rough fescue grassland. Journal of Range Management, 41, 503-508.
52. ZACHARIAS, P.J.K. (1990) The seasonal patterns in plant quality in various ecological zones in Natal. M.Sc. Thesis. University of Natal, Pietermaritzburg.
53. ZAR, J.H. (1996) Biostatistical Analysis. 3rd Edn. (Prentice-Hall: New Jersey).