Compost and agriculture in Sri Lanka. Part 2: Socio-economic aspects

abonos adoption de l'innovation asociaciones de agricultores association d'agriculteurs compost compostage composting composts crops cultivos disponibilidad del agua eau disponible economic sociology engrais organique estructura social extension extension activities farm size farmers associations farming systems fertilizers flux d'information ganado hogares households information flow innovation adoption irrigation livestock ownership plante de culture propiedad riego social structure sociologia economica structure sociale tropical zones vulgarisation agricole water availability zona tropical zone tropicale