You could perhaps try the following databases:
using keywords "remote sensing". I suspect you will get a lot on that,
especially concerning surveys.
On Wed, 28 Aug 1996, Irwin Weintraub wrote:
> At 06:30 PM 8/28/96 +0900, Ancha Srinivasan wrote:
> >I would greatly appreciate if any members of this newsgroup could direct me
> >to any recently published literature or unpublished information on the
> >relevance of spatial information technologies (SIT) in improving the
> >productivity and/or sustainability in small farms (<2 ha), especially in
> >developing countries of the tropics and subtropics. Any information on
> >efforts to convince farmers or farmers' associations to use GIS, GPS, etc.
> >in developing countries is especially welcome.
> >Thank you.
> >Ancha Srinivasan (firstname.lastname@example.org)
> Have you tried searching Abstracts on Tropical Agriculture (TROPAG in
> electronic format)? This database conatains over 500 abstracts monthly of
> world literature on tropical and sub-tropical agriclture from journals,
> mongraphs, conference proceedings, etc. A good source for finding
> literature from tropical countries.
> This database changed its name in 1996 it is now called: Agriculture and
> Environment for Developing Regions. A comprehensive information source for
> Africa, Asia, the Pacific, Latin America and the Caribbean. Still called
> TROPAG in electronif format.
> Try "information systems," "information Service," and "innovation adoption"
> in the subject index.
> Also, AGRIS (AGRINDEX in the printed editions)is a good source of
> information on agriculture in developing countries. It is published by the
> Food and Agriculture Organization of the UN.
> Irwin Weintraub
> Head, Stephen and Lucy Chang Science Library
> Rutgers University, New Brunswick, NJ