Abstract
Under the above title a symposium was held in Wageningen (The Netherlands) on May
3, 1972. The organizers were the Royal Society of Agricultural Science and the Netherlands
Society of Graduates in Agricultural Science. Lectures were given by C.T. de Wit,
C.M.J. Sluysmans, S. Iwema, L.P. Flipse and C. Engel; and a forum
... read more