Crop protection in organic and low input agriculture : options for reducing agrochemical usage - Unwin, Roger (British Crop Protection Council, 1990)
Proceedings of a symposium organised by the British Crop Protection Council, held at Churchill College, Cambridge, UK, 4th-6th September, 1990.
Keywords: kokoukset : kasvinsuojelu : luonnonmukainen viljely; luonnonmukainen viljely : kasvinsuojelu; viljelyksellinen torjunta; kasvinsuojelu : viljelyksellinen torjunta