Existem hoje diversas alternativas tecnológicas de aproveitamento da biomassa para geração de energia, tecnicamente viáveis para pequenas e médias produções. Uma destas alternativas que vem despertando grande interesse é a tecnologia de biodigestão anaeróbia de resíduos animais, e...

Commercial rice imports have accounted for approximately 61%, food aid in rice accounted for about 2%, and domestic rice accounted for some 37% per annum of rice consumption in Ghana over the four years between 2000 and 2003. Compared to the 1990s, these figures show a gradual decline in the...

This study describes the development of bio economic models examining the economic and water quality impact of various proposed policy options in the Upper Waikato catchment. In the first phase nitrogen emissions are determined for representative farming systems using the Overseer nutrient...

Includes cover page, journal info, contents page, and editorial information

Humanity is facing its greatest challenge. To produce 70% more food by 2050 without destroying the environment means doing much more with less. Partly due to the abundant food and record-low food prices achieved by the Green Revolution, overseas development assistance for agriculture dropped...

This paper investigates the effects of network based individual social capital on the access of rural households to services. In the context of development economics, an innovative data collection approach is used to determine network based social capital. The approach originates from the field...

Cover page and table of contents for issue 41/2

Selection logging in the tropics is increasingly moving to systems that reduce the impact of harvesting operations on forests and soils. While much of the focus has been on modifying the tractor logging system using RIL principles, alternative harvesting systems have also been introduced. One of...