Links to the following databases allow to search crop based information in various databases:
Ecocrop allows searching the plants best suited for your soil and climate. It also permits the identification of plant species for defined uses.
WCA InfoNET is an Internet-based integrated information platform which merges high quality information resources and expertise allowing direct access to publications, documents, data, computer programs and discussion groups which provide a knowledge base, support and the necessary global platform for decisions on water conservation and use in agriculture.
FAOSTAT on-line multilingual database currently containing over 1 million time-series records covering international statistics