This research aimed to study the production and economic efficiency for the summer orange crop and the economic impacts of reaching the optimum and the most profitable size for the producers. The research depended on the economic and the descriptive and quantitative analysis, and the field data for random sample which consisted of 120 farmers in 2015/2016.
The results indicated that the fixed production costs represented 355 from the total costs, the variable costs represented 65.5%, from which, the human labor 16.42%, the chemical fertilizers 19.66%, the measure fertilizers 6.675, the machinery work 6.675, crop transport 5.9%, the transplants 5%, and the pest cides and insecticides 4.665% from the total production costs per feddan.
The results also, indicated that summer orange production is far from realizing the optimum and the most profitable size. The actual average production per feddan was about 14.75 ton, the average price was 1100 L.E/ton the total production value was 16225 L.E/ feddan. While, the optimum production size was 17.23 ton, with average costs 455.88 l.e /ton. The economic production was 20.13 ton, which exceeds the actual production by 5.38 ton.
The results indicated that there was a positive relationships between the productivity per feedan and the number of transplants, and the quantity of manure fertilizer, and the quantity of phosphoric fertilizers, and the number of hours by machinery work, and the total human work, and the nitrogenous fertilizer, as independent variables. The total production elasticity estimated by 0.745 which represent decreasing return to scale.
The economic impacts of reaching the optimum and the most profitable size of summer orange include increase in the total revenue, and the net return by feddan, and increase the return and the profit for the producer and Sharkia Governorate.