Response of Snap Bean Plants to Mineral Fertilizers and Humic Acid Application

Two field experiments were carried out in the experimental station of the National Research Centre at EL-Nubaria, EL-Behira Governorate, Northern Egypt, to study the effect of 12 treatments, which were the combinations of three levels of mineral fertilizers application (100%, 65% and 35% of the recommended dose) with four levels of humic acid spraying (0, 1, 2 and 3 g humic acid/l.) on snap bean plant growth, pod yield and quality. Results showed that the vegetative growth of snap bean plants ( plant height, number of leaves and branches as well as fresh and dry weight of whole plant), green pod yields and its quality (pod length, weight, pod content of chlorophyll, fiber, total protein as well as N, P, K content) were improved by increasing the levels of mineral fertilizers application (100%). Results also clear that the vegetative growth of snap bean plants, green pod yields and its quality were improved by increasing the levels of humic acid spraying.