OPTIMIZATION MODEL OF VEGETABLE PRODUCTION STRUCTURE IN SERBIA

Indoor vegetable production, or production in greenhouses enables year-roundproduction, the combined off-season production, greater control of diseases andpests, but also significantly greater production value compared to open field cropproduction. The aim of this paper is to determine such a structure of vegetableproduction in greenhouses that will realize the maximum financial resultconsidering various biotechnological, production, technological and marketconstraints. In this context, model for optimization of vegetable productionstructure in greenhouses was formulated, and at the same time, model analysis andmodel solving was made using the method of linear programming and the softwarepackage "LINDO". Model was analyzed in three variants, depending on theselected optimality criterion: maximization of net income (variant I), maximizationof economics of production (variant II), minimum deviation from the extremevalues (variant III). The results show the optimal sowing - planting structure for allthree variants of defined model; the participation of certain groups of crops in theoverall sowing - planting structure; the required number of working hours in theobserved months of working peaks; that variant I achieves the highest net incomefor defined limiting conditions (4.216.867 din); that variant II achieves the highesteconomics of production (2,25), while variant I and variant III generate the sameeconomics of production (2,20).Moreover, variant I realized the greatest valueofproduction (7.080.300 din), but also the highest variable (2.863.433 din) and totalcosts (3.263.433 din). Published data of various experimental paperworks wereused for this analysis, as well as data from the accounting records of the farms anddata of Statistical Office of the Republic of Serbia