Technical report [includes reports on agronomy, extension, soils, weed management in Sri Lanka]

animal animales animals asia asie bush fallowing clima climat climate climatic zones condiciones ambientales condition de milieu control de malezas control de plagas cropping systems cultivation cultivo economia economic sectors economics economie environment environmental conditions environnement extension extension activities facteur de production fallow systems grazing lands labranza land lutte anti-mauvaise herbe medio ambiente methode methods pastizales pastures pest control pratique culturale production factors professional services secteur tertiaire sector terciario service service professionnel services servicios servicios profesionales sistemas con barbecho sistemas de cultivo site factors sri lanka terre tertiary sector tierras tierras de pastoreo tillage travail du sol vulgarisation agricole weed control zone climatique zone semi-aride