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Development of Mixed Tree and Food Crop Systems in the Humid Tropics: A Response to Population Pressure and De-forestation†

Published online by Cambridge University Press:  03 October 2008

G. A. Watson
G. A. Watson
Affiliation:
Highmeads, Upperfield, Midhurst, Sussex GU29 9AE, England
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Summary

Mixed tree and food crop farming systems are being developed in the humid tropics. They offer one solution to the problems caused by population pressure and de-forestation, since they can provide a satisfactory income to the subsistence farmer, while adequately protecting the environment In seeking to develop optimal systems, examples and information can be drawn from traditional mixed cropping systems, from taungya systems of forestation, and from other systems developed within the commodity cropping sector. However, the full potential of mixtures involving perennials and food crops can only be realised within the limitations of local socio-economic and political circumstances.

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Type
Research Article
Information
Experimental Agriculture , Volume 19 , Issue 4 , October 1983 , pp. 311 - 332
Copyright
Copyright © Cambridge University Press 1983

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References

REFERENCES

Adeyoju, S. K. (1980). The future of tropical agroforestry systems. Commonwealth Forestry Review 59:155–161.Google Scholar
Agamuthu, P., Furtado, J. I. & Broughton, W. J. (1980). Establishment and subsequent effects of legume covercrops on the development of young oil palms (Elaeis guineensis Jacq.). Tropical Ecology & Development 561–568.Google Scholar
Agbede, O. O. & Ojo, G. O. A. (1982). Food crop yield under Gmelina plantations in Southern Nigeria. In Agroforestry in the African Humid Tropics, 79–82 (Ed. MacDonald, L. H.). Ibadan, Nigeria: United Nations University.Google Scholar
Andriesse, J. P. (1979). From shifting cultivation to agroforestry or permanent agriculture? Agroforestry: Proc. 50th ‘Tropische Landbouwdag’ (Symposium on Tropical Agriculture) 1978. Bulletin 303, Dept Agric. Research, Koninklijk Instituut voor de Tropen, Amsterdam.Google Scholar
Ang, B. B. & Shepherd, R. (1978). Cocoa breeding and selection investigations at Prang Besar Research Station. Proc. International Conference on Cocoa and Coconut,21–24 June, 3–17.Kuala Lumpur.Google Scholar
Anon. (1974). Report on a survey of intercropping in immature rubber. Preliminary Tables. Part II. Document No. 48. Rubber Research Centre, Hat Yai, Thailand.Google Scholar
Anon. (1975). Enviromax Planting Recommendations. 1975–1976. Planters' Bulletin, Rubber Research Institute of Malaya. No. 137, 27–50.Google Scholar
Anon. (1976a). Output of Task Forces No. 2 (Farming Systems). Papers presented at the International Consultation on Ipil-ipil. Research, CEC, UPLB, College, Laguna, Philippines. Jointly sponsored by U.S. National Academy of Sciences and Philippine Council for Agriculture and Resources Research. 2–4 September. 35 pp.Google Scholar
Anon. (1976b). Tree farming. Paper available, together with other information, from the PICOP Public Affairs Office, Makati, Rizal, Philippines.Google Scholar
Anon. (1978). Coconut smallholders in Peninsular Malaysia, A paper from the Ministry of Agriculture, Malaysia. Proc. International Conference on Cocoa and Coconuts.21–24 June,Kuala Lumpur. 721–730.Google Scholar
Anon. (1979). Papers on ‘Intercropping with coconut’; ‘Promising pasture and fodder grasses for intercropping with coconut.’ Agrostology and Intercropping Divisions of the Coconut Research Institute of Sri Lanka, Lunuwila.Google Scholar
Anon. (1982a). ICRAF Publications. March, 1982. ICRAF, P.O. Box 30677, Nairobi, Kenya.Google Scholar
Anon. (1982b). What is agroforestry? Agroforestry Systems 1:7–12.CrossRefGoogle Scholar
Arkcoll, D. B. (1979). Nutrient re-cycling as an alternative to shifting cultivation. A paper presented to the Conference on Ecodevelopment and Ecofarming.Berlin Science Foundation. 11 pp.Google Scholar
Atmosoedarjo, S. & Banyard, S. G. (1978). The prosperity approach to forest community development in Java. Commonwealth Forestry Review 57:89–96.Google Scholar
Avila, M., Ruiz, M., Pezo, D. & Cueto, L. J. (1979). The importance of the forestry component of small cattle farms of Costa Rica. In Proc. Workshop Agro-forestry Systems in Latin America, 170–176 (Ed. De las Salas, G.). Turrialba, Costa Rica: CATIE.Google Scholar
Ball, J. B. (1977). Taungya in Southern Nigeria. Project Working Document NIR/71/546–14. UNDP/FAO Forest Development Project. Federal Department of Forestry, Lagos, Nigeria.Google Scholar
Ball, J. B. & Umeh, L. I. (1982). Development trends in taungya systems in the moist lowland forest of Nigeria between 1975 and 1980. In Agro-forestry in the African Humid Tropics, 72–78 (Ed. MacDonald, L. H.). Ibadan, Nigeria: United Nations University.Google Scholar
Beer, J. (1979). The UNU-CATIE ‘La Suiza’ agro-forestry case study. In Proc. Workshop Agro-Forestry Systems in Latin-America, 188–192. (Ed. De las, G. Salas). Turrialba, Costa Rica: CATIE.Google Scholar
Beer, J. (1981). ‘CATIE-UNU CONVENIO’. Annual Report. Turrialba, Costa Rica: CATIE.Google Scholar
Behmel, F. & Neumann, J. (1982). An example of agro forestry for tropical mountain areas. In Agro-forestry in the African Humid Tropics, 92–98 (Ed. MacDonald, L. H.). Ibadan, Nigeria: United Nations University.Google Scholar
Bishop, J. P. (1980). Family agricultural-swine-forestry-production in the Spanish-American humid tropics. In Proc. Workshop Agro-Forestry Systems in Latin America, 140–144 (Ed. De las Salas, G.). Turrialba, Costa Rica: CATIE.Google Scholar
Boonkird, , Sa-ard, (1978). Taungya system: its applications, ways and means of improvement in Thailand. Paper presented at the Eighth World Forestry Congress.16–28 October, 1978.Jakarta.Google Scholar
Bowers, R. D. (1982). Agricultural tree crops as a no-tillage system. In Agro-forestry in the African Humid Tropics, 49–51 (Ed. MacDonald, L. H.). Ibadan, Nigeria: United Nations University.Google Scholar
Broughton, W. J. (1977). Effect of various covers on soil fertility under Hevea brasiliensis Muell. Arg. and on growth of the tree. Agro Ecosystems 3:147–170.CrossRefGoogle Scholar
Budowski, G. (1982). Applicability of agro-forestry systems. In Agro-forestry in the African Humid Tropics. 13–16 (Ed. MacDonald, L. H.). Ibadan, Nigeria: United Nations University.Google Scholar
Buol, S. W. & Sanchez, P. A. (1978). Rainy tropical climates: physical potential, present and improved farming systems. In Proc. 11th International Congress of Soil Science, 292–311. University of Alberta, Edmonton, Canada.Google Scholar
Burley, J. (1980). Choice of tree species and possibility of genetic improvement for smallholder and community forests. Commonwealth Forestry Review 59:311–326.Google Scholar
Byrne, P. N. (1976). Budded cocoa for Malaysia. Proc. East Malaysia Planters' Association Cocoa-Coconut Seminar, Tawau, Sabah. 84–89.Google Scholar
Castro, A. M. G. de, & Cancian, A. J. (1980). Aspectos fenologicos, fitossanitarios e economicos de Heveicultura em areas de escape (Nota previa). Resumos do trabalhos tecnicos. Ill Seminario Nacional de Scringucira, Manaus.Google Scholar
Catterson, T. M. (1982). Agro-forestry production systems: putting them into action. In Agro-forestry in the African Humid Tropics, 120–133 (Ed. MacDonald, L. H.). Ibadan, Nigeria: United Nations University.Google Scholar
Chan, H. Y. (1971). Soil and leaf nutrient surveys for discriminatory fertiliser use in West Malaysian rubber holdings. In Proc. R.R.I.M. Planters' Conference, 201–203. Kuala Lumpur.Google Scholar
Chandry, A. & Silim, A. (1980). Agri-silviculture in Uganda. Unasylva 32:21–25.Google Scholar
Chapman, E. C. (1979). Trees and shifting cultivation in Southeast Asia: towards reunion rather than divorce. Proc. Workshop Agro-Forestry Systems in Latin America, 56–59 (Ed. De las Salas, G.). Turrialba, Costa Rica: CATIE.Google Scholar
Chapman, E. C. (1980). Agricultural intensification and the role of forestry in Northern Thailand. In Proc. Programmatic Workshop on Agro-forestry and Highland-Lowland Interactive Systems, 28–32 (Eds Ives, J. D., Sabharsi, S. and Vorauri, P.). Mai, Thailand: The United Nations University.Google Scholar
Combe, J. & Budowski, G. (1979). Classification of agro-forestry techniques. In Proc. Workshop Agro-Forestry Systems in Latin America, 17–47 (Ed. De las Salas, G.). Turrialba, Costa Rica: CATIE.Google Scholar
Combe, J., Jimenez Saa, H. & Monge, C. (1981). Bibliography on Tropical Agroforestry. Centro Agronomico Tropical de Investigacion y Ensenanza. Scrie Bibliotecologia y Documentacion. Bibliografia No.6.Google Scholar
Corley, R. H. V. (1981). Clonal planting material for the oil palm industry. The Planter 58:515–528.Google Scholar
Cunningham, J. M. M., Eadie, J., Maxwell, T. J. & Sibbald, A. R. (1978). Inter-relations between agriculture and forestry: An agricultural view. Scottish Forestry 32:182–193.Google Scholar
Davison, G. W. H. (1982). How much forest is there? Malayan Naturalist. Supplement to the Malayan Nature Journal 35:11–12.Google Scholar
Denamany, G., Ahmed, Md. Sharif bin & Hamid, Nasrun bin Baginda (1978). Coconut intercropping systems in Peninsular Malaysia. Proc. International Conference on Cocoa and Coconut.14–17 June.Kuala Lumpur.Google Scholar
Deval, J. L. & Legault, F. (1982). Establishment of forest villages in Gabon. In Agro-forestry in the African Humid Tropics, 65–66 (Ed. MacDonald, L. H.). Ibadan, Nigeria: United Nations University.Google Scholar
de Vries, D. T. L. (1974). Optimum intercropping patterns for rubber smallholders. Economic Division, Rubber Research Centre. Hat Yai, Thailand.Google Scholar
Dickinson, J. C. (1972). Alternatives to mono-culture in the humid tropics of Latin America. The Professional Geographer 24:217–222.Google Scholar
Donaldson, G. (1978). Forestry. Sector Policy Paper. World Bank. Washington D.C., USA.Google Scholar
Douglas, Sholto J. & Hart, R. A. de J. (1976). Forest Farming. London: Watkins Publishing.Google Scholar
Doyen, A. (1980). Integration of multiple-use research in an environmental study of a rice development project in the Guinean zone – Lower Casamance – Senegal. Paper presented at the IUFRO/MAB Conference: Research on Multiple-Use of Forest Resources.Google Scholar
Dublin, P. (1980). Multiplication vegetative in vitro de l' Arabusta. Café, Cacao, Thé 24:281–290.Google Scholar
Dubois, J. (1979). The role of IICA-TROPICOS Program in the promotion of agrosilvopastoral systems. Proc. Workshop Agro-Forestry Systems in Latin America, 10–14 (Ed. de las Salas, G.). Turrialba, Costa Rica: CATIE.Google Scholar
Earl, D. (1975). A renewable source of fuel. Unasylva 27:21–26.Google Scholar
Eden, M. J. (1980). A traditional agro-system in the Amazon region of Colombia. Tropical Ecology & Development 509–514.Google Scholar
Enabor, E. E. (1975). Socio-economic aspects of taungya in relation to traditional cultivation in tropical developing countries. FAO Soils Bulletin. No. 24, 191–202. Rome, FAO.Google Scholar
Enabor, E. E., Okojie, J. A. & Verinumbe, I. (1982). Taungya systems: socio-economic propects and limitations. In Agro-forestry in the African Humid Tropics, 59–64 (Ed. MacDonald, L. H.). Ibadan, Nigeria: United Nations University.Google Scholar
FAO (1978). Farming Systems Research at the International Agricultural Research Centres. TAC Secretariat, Agriculture Department, Annex 3:1–19. Rome: FAO.Google Scholar
Flores, R. F. (1979). Coffee production systems in Mexico. In Proc. Workshop Agro-forestry Systems in Latin America, 60–72 (Ed. De las Salas, G.). Turrialba, Costa Rica: CATIE.Google Scholar
Ford, L. B. (1979). An estimate of the yield of Cedrela odorata L. (Syn. C. mexicana Roem.) grown in association with coffee. Proc. Workshop Agro-Forestry Systems in Latin America, 177–186 (Ed. De las Salas, G.). Turrialba, Costa Rica: CATIE.Google Scholar
Foster, H. K. & Chang, K. C. (1977). The diagnosis of the nutrient status of oil palms in West Malaysia. International Developments in Oil Palm. Proc. Malaysian International Agricultural Oil Palm Conference,14–19 June, 1976.Kuala Lumpur.Google Scholar
Fournier, L. A. (1979). Alder crops (Alnus jorullensis) in coffee plantations. In Proc. Workshop Agro-forestry Systems in Latin America, 158–162 (Ed. G, De las Salas). Turrialba, Costa Rica: CATIE.Google Scholar
Gascon, J. P. & Lamothe, M. De Nuce de (1980). Genetic improvement of the coconut: results and prospects. Proc. International Conference on Cocoa and Coconut,21–24 June 1978,Kuala Lumpur, 489–499.Google Scholar
Grandstaff, T. B. (1980). Shifting cultivation in Northern Thailand. Possibilities for development. Resource Systems Theory and Methodology Series, No. 3. NRTS-11/UNUP, 192. The United Nations University.Google Scholar
Harwood, R. R. & Price, E. C. (1976). Multiple cropping in tropical Asia. In Multiple Cropping, 11–40. ASA Special Publication Number 27. Madison: American Society of Agronomy.Google Scholar
Hatch, T. (1980). Shifting cultivation in Sarawak: past, present and future. Tropical Ecology and Development 483–496.Google Scholar
IITA (1980). Annual Report for 1979. International Institute of Tropical Agriculture, Ibadan, Nigeria.Google Scholar
Kaul, O. M. (1980). Impact of forest land uses on environment in India. Paper presented at the lUFRO/MAB Conference on Research on Multiple-Use of Forest Resources,Flagstaff, Arizona.Google Scholar
Khera, H. S. (1980). Future of the coconut industry. Proc. International Conference on Cocoa and Coconuts,21–24 June 1978.Kuala Lumpur, 742–752.Google Scholar
King, K. F. S. (1979). Agroforestry (a new system of land management). Agroforestry: Proc. 50th ‘Tropische Landbouwdag’ (Symposium on Tropical Agriculture) 1978. Bulletin 303, Dept Agric. Research, Koninklijk Instituut voor de Tropen, Amsterdam.Google Scholar
King, K. F. S. (1980). Forestry's contribution to social and economic development. Commonwealth Forestry Review 59:515–525.Google Scholar
King, K. F. S. & Chandler, M. T. (1978). The Wasted Lands. The Programme of Work of ICRAF, Nairobi. International Council for Research in Agroforestry.Google Scholar
Kio, P. R. (1972). Shifting cultivation and multiple use of forest land in Nigeria. Commonwealth Forestry Review 51:144–148.Google Scholar
Kunstadter, P. (1980). Implications of socio-economic, demographic, and cultural changes for regional development in Northern Thailand. In Proc. Programmatic Workshop on Agro-Forestry and Highland-Lowland Interactive Systems, 13–27 (Eds Ives, J. D., Sabharsi, S. and Vorouri, P.). Chiang Mai, Thailand: The United Nations University.Google Scholar
Lamb, A. F. A. (1967). Impressions of Nigerian Forestry after an Absence of 23 Years. Oxford: Commonwealth Forestry Institute.Google Scholar
Lamb, A. F. A. (1973). Fast Growing Timber Trees of the Lowland Tropics. No. 6. Pinus Caribaea. vol. 1. Oxford: Commonwealth Forestry Institute.Google Scholar
Leakey, P. R. B., Last, F. T. & Longman, K. A. (1982). Domestication of tropical trees: An approach securing future productivity and diversity in managed ecosystems. Commonwealth Forestry Review 61:33–42.Google Scholar
Leith, H. (1976). Biological productivity of tropical lands. Unasylva 28:114.Google Scholar
Mainstone, B.J. (1969). Residual effects of ground cover and nitrogen fertilisation of Heuea prior to tapping. Journal of the Rubber Research Institute of Malaya 21:113–125.Google Scholar
Mansor, M. R. (1972). Taungya in Negri Sembilan. The Malayan Forester 25:309–315.Google Scholar
Habib, Matongdang & Rahman, Rangtuki (1978). Intercropping with upland rice in smallholder project. Bull. BPP Medan 9:115–124.Google Scholar
Maydell, H. J. von. (1979). Agroforestry to combat desertification. Agroforestry: Proc. 50th ‘Tropische Landbouwdag’ (Symposium on Agriculture) 1978. Bulletin 303, Dept Agric. Research, Koninklijk Instituut voor de Tropen, Amsterdam.Google Scholar
McConnell, D. J. & Dharmapala, K. A. E. (1978). The forest-garden farms of Kandy. A paper based on Farm Management Report No. 7, Economic Structure of Kandyan Forest-Garden Farms. FAO Agricultural Diversification Project, Peradeniya, Sri Lanka, 1973.Google Scholar
Meadows, D. J., Sule, V. K., Jensen, P. & Palomar, R. (1980). Coconut wood utilisation. The Planter (Kuala Lumpur) 56:217.Google Scholar
Meerman, J. & Cochrane, S. H. (1982). Population growth and food supply in sub-Saharan Africa. Finance & Development 19:12–17.Google ScholarPubMed
Mellis, R. (1978). Rapport de stage effectué a la IRCA sur les cultures intercalaircs. 15 July 1977–15 January 1978. Department of Tropical Plant Technology, University of Wageningcn, Netherlands.Google Scholar
Nair, P. K. R. (1979). Intensive Multiple Cropping with Coconuts in India. Berlin and Hamburg: Verlag Paul Parey.Google Scholar
Nair, P. K. R. (1982). Agro-forestry: A sustainable land-use system for the fragile ecosystems in the tropics. The Malayan Nature Journal 35:109–123.Google Scholar
Nair, P. K. R. & Varghese, P. T. (1980). Recent advances in the management of coconut-based ecosystems in India. Tropical Ecology and Development 569–580.Google Scholar
Ng, S. K. (1977). Review of oil palm nutrition and manuring – scope for greater economy in fertilizer usage. International Developments in Oil Palm. Proc. Malaysian International Agricultural Oil Palm Conference.14–17 June 1976,Kuala Lumpur. 209–233.Google Scholar
Okafor, J. C. (1980). Edible indigenous woody plants in the rural economy of the Nigerian Forest zone. Forest Ecology and Management 3:45–55.Google Scholar
Okafor, J. C. (1982). Promising trees for agro-forestry in Southern Nigeria. In Agroforestry in the African Humid Tropics, 103–106 (Ed. MacDonald, L. H.). Ibadan, Nigeria: United Nations University.Google Scholar
Okigbo, B. N. & Greenland, D. J. (1976). Intercropping cropping systems in tropical Africa. In Multiple Cropping, 63–101 ASA Special Publication No. 27. Madison: American Society of Agronomy.Google Scholar
Owino, F. (1982). Agro-forestry developments in Kenya: Prospects and problems. In Agro-forestry in the African Humid Tropics, 137–139 (Ed. MacDonald, L. H.). Ibadan, Nigeria: United Nations University.Google Scholar
Palit, S. (1981). Mikania – A growing menace in plantation forestry in West Bengal. Indian Forester 107:96–101.Google Scholar
Pierre, G. (1980). How we use the principal of multiple-use forestry in Belgium. Proc. IUFRO/MAB Conference: Research on Multiple Use of Forest Resources.18–23 May.Flagstaff, Arizona. 97–101.Google Scholar
Reátegui, R. R. (1979). Development of integrated agricultural, livestock and forestry production systems in tropical Peru. In Proc. Workshop Agro-forestry Systems in Latin America, 91–100 (Ed. De las Salas, G.) Turrialba, Costa Rica: CATIE.Google Scholar
Reed, M. E. D. & Sumana, X. X. (1976). Economic aspects of intercropping in immature rubber and oil palm in Indonesia. Note No. 131 of UNDP/FAO Project INS/72/004.Google Scholar
Roche, L. (1973). The practice of agri-silviculture in the tropics with special reference to Nigeria. FAO Regional Seminar on Shifting Cultivation and Soil Conservation in Africa. 179–190.Google Scholar
Roche, L. (1977). Forestry and the community. Commonwealth Forestry Review 56:299–315.Google Scholar
Roche, L. & Cooper, R. (1980). Forestry for local community development: manpower, training and education requirements. Commonwealth Forestry Review 59:163–179.Google Scholar
Rosero, P. & Gewald, N. (1979). Growth of laurel (Cordia alliodora) in coffee and cacao plantations and pastures in the Atlantic region of Costa Rica. In Proc. Workshop Agro-forestry systems in Latin America, 205–208 (Ed. De las Salas, G.). Turrialba, Costa Rica: CATIE.Google Scholar
Sanchez, O. C. & Polito, J. C. (1980). Agro-forestry in the field experimental forest of San Felipe Bacalar, Quintana Roo. Paper presented at the IUFRO/MAB Conference: Research in Multiple-Use of Forest Resources,18–23 May,Flagstaff, Arizona, 79–84.Google Scholar
Sanchez, P. A. (1979). Soil fertility and conservation considerations for agroforestry systems in the humid tropics of Latin America. In Soils Research in Agroforestry, 79–124 (Eds Mongi, H. O. and Huxley, P. A.). Nairobi: ICRAF.Google Scholar
Sanger, C. (1977). Trees for People. Ottawa: International Development Research Centre. Publications IDRC-094e.Google Scholar
Soong, N. K. & Yap, W. C. (1976). Effect of cover management on physical properties of rubber growing soils. Journal of the Rubber Research Institute of Malaya 24:145–159.Google Scholar
Sparnaaij, L. D. (1957). Mixed cropping in oil palm cultivation. WAIFOR, 111. No. 7, 244.Google Scholar
Spears, J. S. (1979). Can the wet tropical forest survive? Commonwealth Forestry Review 58:1–16.Google Scholar
Spears, J. S. (1980). Can farming and forestry co-exist in the tropics? Unasylva 33:2–12.Google Scholar
Speirs, A. J. (1974). Towards an understanding of rubber smallholders. A socio-economic survey of some rubber villages in Thailand. Document No. 42, Rubber Research Centre, Hat Vai, Thailand.Google Scholar
Stewart, G. G. (1978). Inter-relations between agriculture and forestry in the uplands of Scotland: A forestry view. Scottish Forestry 32:153–181.Google Scholar
Syed, R. A. & Shah, S. (1977). Some important aspects of insect pest management in oil palm estates in Sabah, Malaysia. International Developments in Oil Palm. Proc. Malaysian International Agricultural Oil Palm Conference.14–17 June, 1976.Kuala Lumpur.Google Scholar
Taylor, G. F. (1981). The forestry/agriculture interface: some lessons from Indian forest policy. Commonwealth Forestry Review 60:45–52.Google Scholar
Tchoumé, T. (1982). Agro-forestry possibilities in oil palm plantations in the Ivory Coast. In Agro-forestry in the African Humid Tropics, 111–114 (Ed. MacDonald, L. H.). Ibadan, Nigeria: United Nations University.Google Scholar
Templeton, J. K. (1974). Proposals for intercropping in accelerated programmes of rubber replanting. Rubber Research Centre, Hat Vai, Thailand.Google Scholar
Templeton, J. K. (1978). Natural Rubber. Organisations and Research in Producing Countries. New York: International Agricultural Development Service.Google Scholar
Tinsley, T. W., Entwhistle, P. F. & Robertston, J. S. (1980). Advances in insect control. 1. Insect pathogenic viruses. Commonwealth Forestry Review 59:327–336.Google Scholar
Urpi, J. M. (1979). Consideraciones preliminares sobre et desarrollo de una tecnica de polinizacion controlada en pejibaye (Bactris gasipaes, H.B.K.). Paper prepared for co-operative programme of work on pejibaye. ASBANA-MAB-UCR. Costa Rica. 8 pp.Google Scholar
Vanialingam, T., Khoo, K. T. & Chew, P. S. (1980). Performance of Malayan Dwarf × Tall coconut hybrids in Peninsular Malaysia. Proc. International Conference on Cocoa and Coconuts,21–24 June, 1978.Kuala Lumpur. 532–542.Google Scholar
Vega, L. (1979). Profit-making capacities of regular plantations as compared with the agrosilvicultural model: Surinam. In Proc. Workshop Agro-forestry Systems in Latin America, 107–121 (Ed. De las Salas, G.). Turrialba, Costa Rica: CATIE.Google Scholar
Wan, , Embong, Mohd bin Wan & Chee, Y. K. (1976). Maximising returns in immature rubber smallholdings. Proc. PRIM Planters' Conference,Kuala Lumpur.Google Scholar
Watson, G. A. (1964). Maintenance of soil fertility in the permanent cultivation of Hevea brasiliensis in Malaya. Outlook on Agriculture 4:103–109.Google Scholar
Watson, G. A. (1980). A study of tree crop farming systems in the lowland humid tropics. AGR Technical Note No. 2. Vols. I and II. Washington, D.C.: Worid Bank.Google Scholar
Watson, G. A. (1982). Tree crop farming in the humid tropics: some current developments. In Agro-forestry in the African Humid Tropics, 6–12 (Ed. MacDonald, L. H.). Ibadan, Nigeria: United Nations University.Google Scholar
Watson, G. A., Wong, P. W. & Narayanan, R. (1964). Effects of cover plants on soil nutrient status and on growth of Hevea, IV. Leguminous creepers compared with grasses, Mikania cordata and mixed indigenous covers on four soil types. Journal of the Rubber Research Institute of Malaya 18:123–145.Google Scholar
Watters, R. F. (1971). Shifting cultivation in Latin America. FAO Forest Review Paper No. 17. Rome: FAO.Google Scholar
Weaver, P. (1980). Agri-silviculture in tropical America. Unasylva 21:2–12.Google Scholar
Westoby, J. (1978). Forest industries for socio-economic development. Paper presented at Eighth World Forestry Congress,16–28 Oct.,Jakarta.Google Scholar
Wiersum, K. F. (1980). Possibilities for use and development of indigenous agro-forestry systems for sustained land-use in Java. Tropical Ecology & Development 515–521.Google Scholar
Wong, P. W. (1964). Evidence for the presence of growth inhibitory substances in Mikania cordata (Burm. F.) B. L. Robinson. Journal of the Rubber Research Institute of Malaya 18:231–242Google Scholar
Mansur, Yaacob Tunku & StClair-George, M. A. (1979). Oil palm, rubber, cocoa – a comparative outlook. Proc. 1979 Conference on Investment Opportunities in Agriculture.Kuala Lumpur.Google Scholar