In: Ir F.R. Boone, Editor, Experiences with three Tillage Systems on a Marine Loam Soil. II. 1976–1979, A joint study of the Westmaas Research Group on New Tillage Systems, carried out on the Westmaas Experimental Husbandry Farm, Pudoc, Berkeley, Los Angeles and London (1984) ISBN 90-220-0855 X.. |