This Brief presents a historical overview of the Foerster-type nonradiative energy transfer and a compilation of important progress in FRET research, starting from Foerster until today, along with a summary of the current state-of-the-art. Here the objective is to provide the reader with a complete account of important milestones in FRET studies and FRET applications as well as a picture of the current status.

Vegetables that are easy to grow - potatoes, onions, tomatoes - provide economic, social and nutritional advantages and can make significant differences to smallholder livelihoods. With this booklet, policy-makers and development personnel will recognize the opportunities that are available for producing and marketing quality vegetables. The main target audience for the FAO Diversification booklets are people and organizations that provide advisory, business and technical support to small-scale farmers and local communities in low and middle-income countries, as well as policy makers and programme managers. They are not intended to be technical "how to do it "guidelines; however each booklet identifies additional sources of information, technical support and websites.]