BỐI CẢNH thung lũng nội địa (IV) (Cũng được biết đến như Fadama ở địa phương, bãi cát ngầm, và dambos) Có tiềm năng để trở thành agroecosystems với một tác động đáng kể về sản xuất lương thực châu Phi (Izac et al., 1991). Agroecosystems luận án được thuận lợi cho trồng lúa và canh tác mùa khô và có những tiềm năng để tăng Sản lượng và diện tích ở châu Phi nếu cẩn thận chú ý trả tiền để IS kỹ thuật, hạn chế môi trường và kinh tế xã hội (Juo và Lowe, 1986). . | CHAPTER 8 Regional Characterization of Inland Valley Agroecosystems in West and Central Africa Using High-Resolution Remotely Sensed Data Prasad S. Thenkabail and Christian Nolte BACKGROUND Inland valleys IVs locally also known as fadamas bas-fonds and dambos have the potential to become agroecosystems with a substantial impact on African food production Izac et al. 1991 . These agroecosystems are favorable for rice cultivation and dry season cropping and have the potential to increase acreage and yields in Africa if careful attention is paid to technical environmental and socioeconomic constraints Juo and Lowe 1986 . Inventorying mapping and characterizing inland valleys at regional level meso semidetailed level typically mapped on scales of 1 50 000 through 1 250 000 in sample areas of macrolevel agroecological zones Figure color section is crucial for the selection of representative research sites which then allows for the development of appropriate technologies that can be reliably tested and transferred to larger regions regionalization or technology transfer . Recognition of the importance of inland valley agroecosystems led the International Institute of Tropical Agriculture IITA to adopt a new research agenda as put forth in Izac et al. 1991 . This strategy involved a combination of biophysical and socioeconomic research issues to be addressed at three spatial scales a. level I macro or continental or subcontinental typically mapped in scales of greater than or equal to 1 5 000 000 b. level II meso or regional or semidetailed mapped in scales of 1 100 000 to 1 250 000 and c. level III micro or research site watershed related mapped in scales of less than or equal to 1 50 000 . This was conceived to facilitate the design of appropriate technology able to sustain the highly varying resource base and at the same time to be acceptable to smallholder farmers in the diverse socioeconomic and ethnic environment of West and Central Africa. The first step to .
