Although Egypt enjoys a comparative advantage in the production of fresh vegetables, especially pepper, after the success of its cultivation in greenhouses with high quality and productivity, in addition to achieving a rewarding economic return compared to the economic return achieved from vegetable crops in open fields, the expansion of its cultivation in greenhouses is not as great. Which is commensurate with the capabilities of Egypt in this field, especially after adopting a national project for greenhouses, in addition to achieving the maximum benefit from the land and water resources and overcoming the seasonality of production and protecting it from climatic fluctuations, which requires encouraging its cultivation in greenhouses in the new lands to double production and achieve a surplus that contributes to An increase in agricultural exports from it. The research reached a set of results, the most important of which are the following:
1-The construction costs of an acre of greenhouses are represented in the structure of the greenhouse, the irrigation network, the rent, the living room and the store, and others. The greenhouse structure items are the metal structure, galvanized wire, plastic, climbing rope, installation costs, and trays that represent about 70.75%, 0.83%, 15.19%, 0.69%, 1.00%, 0.85% of the total costs of the greenhouse structure, which amount to about 483.45 thousand EGP, representing 89.20% of the total construction costs. It includes the items of an irrigation network for one feddan of greenhouses, whose items are represented in each of the pipes and hoses, ground motors and cocks, motors for spraying pesticides, and fiber tanks, with a value of about 7.90, 8.13, 4.23, and 2.05 thousand pounds.
2-The items of operational costs included preparing the land for cultivation, fertilizing, seeds and preparing seedlings, cultivation, electricity and water costs, and labor costs representing about 3.53%, 9.9%, 37.20%, 17.40%, with total rates of agricultural costs amounting to about 68.02% of the total operational costs. Electricity, water and annual labor costs amounted to about 6.9, 96 thousand pounds / year / feddan, representing about 2.17%, 29.81% of the total annual operating costs, which amounted to about 322.5 thousand pounds.
3-From the productive and economic indicators of the pepper crop in greenhouses, it was found that the average production per square meter of the greenhouse was about 20 kg / m2, and the average production of the greenhouse was about 7.22 tons per greenhouse per session, about 57.76 per feddan per session, and about 115.52 tons per feddan during the year, with a total The annual production value of the greenhouse amounted to about 123.48 thousand pounds, and for the feddan 1057 thousand pounds for each of them, respectively, and the operating costs per feddan amounted to about 322.5 thousand pounds / year, with total annual costs amounting to about 273.54, 325.4, 378.82 thousand pounds / feddan, with an average net profit Annual per acre amounted to about 376.787 thousand pounds.
4- It was found from the results of the analysis, which show the relative importance of the problems faced by the farmers of the research sample of the pepper crop in greenhouses and their probability distribution at a level of
 
confidence of 95%. And the egg fly, where the problem was repeated 28 times, with a rate of about 95%. The confidence interval for the probability of the problem occurring ranged between a minimum of about 0.84 and a maximum of about 1.02. In the second place came the problem of the inappropriate size of the trays, as the problem was repeated 26 times, with a rate of 87%, and it ranged between a minimum of about 0.75 and a maximum of about 0.99. Confidence for the probability of the problem occurring between a minimum of about 0.70 and a maximum of about 0.97.