Home Publications & Data Report The humidity factor in stomatal control and its effect on crop productivity author(s) El-Sharkawy, Mabrouk A. published in1985 original file download full citation EL-SHARKAWY, M.A.; COCK, J.H. 1985. The humidity factor in stomatal control and its effect on crop productivity. Centro Internacional de Agricultura Tropical (CIAT), Cali, CO. 12 p.