Foliar Application of ZnSO4 and CuSO4 Affects the Growth, Productivity, and Fruit Quality of Washington Navel Orange Trees (Citrus sinensis L.) Osbeck

The goal of this study was to examine how improve the vegetative growth, nutritional status, productivity, and fruit quality Washington navel orange trees by examining effect foliar application ZnSO4 (0, 300, 600 mg/L) solutions in combination with CuSO4 200, 400 on trees, which were 11 years old grown clay loam soil a surface irrigation system. results showed that all investigated measurements responded specifically each factor. elicited stronger more effective response than CuSO4. Nonetheless, varied only slightly or moderately from one measurement next. In terms interaction between concentrations, factor directly reflected its combinations, (600 (200 being most for majority under consideration. When highest level combined CuSO4, values various growth parameters shoot length diameter, number leaves per shoot, leaf area, total assimilation area obtained. As result, status (the chlorophyll mineral contents) significantly coupled treatment mg/L Moreover, combinations concentration (400 exhibited greatest statistical fruiting aspects as well quality. Consequently, it can be recommended using spray monthly basis during period March July could safely similar environmental conditions horticulture practices adopted present experiment.