1. Gove, P. B. (ed.) 1981. Webster's Third New International Dictionary, p. 44. Springfield, Mass.: Merrian-Webster.

2. Dalal-Clayton, D. B. 1985. In Black's Agricultural Dictionary, 2nd ed., p. 10. London: A&C Black.

3. Grigg, D. B. 1995. An Introduction to Agricultural Geography, 2nd ed. London: Routledge.

4. United Nations Development Programme. 1995. Human Development Report, pp. 150-230. New York: Oxford University Press.

5. Grigg, D. B. 1974. The Agricultural Systems of the World: an Evolutionary Approach, Cambridge Geographical Studies, No. 5, pp. 1-284. London: Cambridge University Press.

6. Spedding, C. R. W. 1988. An Introduction to Agricultural Systems, 2nd ed., pp. 101-129. London: Elsevier Applied Science.

7. Ruthenberg, H. 1971. Farming Systems in the Tropics, pp. 252-281. London: Oxford University Press.

8. Food and Agriculture Organization of the United Nations. 1994. Production Yearbook 1993, pp. 215-221, 233-238. Rome: FAO.

9. World Resources Institute. 1994. World Resources 1994-95, pp. 285-384. New York: Oxford University Press.

10. Alexandratos, N. (ed.) 1995. World Agriculture: Towards 2010. An FAO Study, pp. 1-34, 421-425. Chichester: Food and Agriculture Organization of the United Nations.

11. Food and Agriculture Organization of the United Nations. 1996. Fertilizer Yearbook 1995, p. 4. Rome: FAO.

12. van Lier, H. N. 1996. Sustainable rural systems: Concepts from a land use planner's perspective. In: Geographical Perspectives on Sustainable Rural Systems, pp. 14-23. Proceedings of the Tsukuba International Conference on the Sustainability of Rural Systems. Kasai Publications, Tokyo, Japan.

13. Herren, R. V., and R. L. Donahue. 1991. The Agriculture Dictionary. New York: Delmar.

14. World Commission on Environment and Development. 1987. Our Common Future. Oxford, England: Oxford University Press.

15. Herdt, R. W., and R. A. Steiner. 1995. Agricultural sustainability: Concepts and conundrums. In: Agricultural Sustainability. Economic, Environmental and Statistical Considerations, eds. V. Barnett, R. Payne, and R. Steiner, pp. 1-13. Wiley: Chichester.

16. Lynam, J. K., and R. W. Herdt. 1989. Sense and sustainability: Sustainability as an objective in international agriculture research. J. Agric. Econ. 3:381-398.

17. Bryden, J. M. 1994. Some preliminary perspectives on sustainable rural communities. In: Bryden et al (ed.), Towards Sustainable Rural Communities, eds. J. M. Bryden et al., pp. 41-50. The Guelph Seminar Series, Guelph, Ontario: Arkleton Trust and University of Guelph.

18. Hanken, A. F. G., and H. A. Reuver. 1973. Inleiding tot de systeemleer (Introduction to System Analysis). Leiden, The Netherlands: St. Kroese.

Was this article helpful?

0 0
Growing Soilless

Growing Soilless

This is an easy-to-follow, step-by-step guide to growing organic, healthy vegetable, herbs and house plants without soil. Clearly illustrated with black and white line drawings, the book covers every aspect of home hydroponic gardening.

Get My Free Ebook

Post a comment