Contract farming is a key element for the Brazilian Biodiesel Program, which aim to promote social inclusion of small scale farmers. The relationship between the industry and the farmers is regulated by a certification called Social Fuel Seal. The seal allows to the biodiesel producers favorable...

The first observations of UV (290–400 nm) ever made at an agro-meteorological/radiometric station located in the metropolitan region of Maceió (9°28′S, 35°49′W, 127 m), Northeast Brazil, during 2008 are reported in this work. Solar UV radiation variability in different time scales and...