na INLIS000000000007772 Ind 0010-1118007772 A Physiological study of shading and density effects on the growth and the efficiency of solar energy conversion in some field crops KAMEL, M.S. M.S. Kamel Wageningen Cairo University 1959 Meded, Landbouwhogeschool, Wageningen 59 (5), 1-101 (1959) Meded, Landbouwhogeschool, Wageningen 59 (5), 1-101 (1959) 633.16KAMp 633.16 FOOD CROPS SHADING GROWTH SOLAR ENERGY 943/59