Useful throughout history for their medical as well as other benefits, plant-derived compounds have gained particular importance recently, due to environmental factors. The isolation and characterization of plant products, the identification of their role in the plant, and ways of synthesizing identical compounds or more potent analogues are covered. Also includes methods of culturing plant tissues and genetic engineering as a means of increasing the yield of desired substances from plants. Special emphasis is placed on plants previously unknown to Western scientists.

"First published in 1945 by Collins"--Copyright page.

First published in 1979. This study examines various aspects of agriculture in West Africa. There is a strong chapter on the economics of agriculture and records, farm machinery, agricultural improvement, fish and the basics of crop and livestock production are all dealt with. The role of government policy in the improvement of agriculture is also examined. This title will be useful to undergraduates concerned with agriculture who want a good grounding before going on to their specialised fields of the applied sciences, as well as to those interested in commercial farming and policy makers in civil administration.

Note: 1973-77 editions formerly classified U0500T001-