Long-term experiments in agricultural and ecological sciences : proceedings of a conference to celebrate the 150th anniversary of Rothamsted Experimental Station, held at Rothamsted, 14-17 July 1993 / edited by R. A. Leigh and A. E. Johnston. - Oxon, UK : CAB International, 1994. - xiv, 428 p. : ill.

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Agricultural experiment stations.
Agriculture--Experimentation.