Chemistry and agriculture; proceedings of a symposium organised by the Industrial Div. of the Chemical Society, as part of the Annual Chemical Congress, Bristol, 3-5 Apr, 1979

abonos abonos nitrogenados agricultura agricultural chemicals agriculture carne chemistry chimie contaminantes engrais fertilizers fixation de l'azote fongicide fungicidas fungicides herbicidas herbicide herbicides meat nitrite nitrites nitritos nitrogen fertilizers nitrogen fixation pesticide pesticides plaguicidas plant growth substances polluant pollutants produit agrochimique sustancias de crecimiento vegetal viande