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The Study aims to estimate the production and costs functions for a number of important aromatic and medicinal crops under conditions of chemical and organic J. Agric. Sci. Mansoura Univ., 34 (5), May, 2009 4451 agriculture .The study relay on statistical methods such as stepwise Regression, and Backward Elimination to determine the most important factors which affect both production and cost level. The research results show that the most important factors affecting the production function of chamomile are the amount of seed and fertilizer nitrous. Also found that the break even yield equivalent to the volume of production is 780 kg under conditions of chemical agriculture. On the other hand, the most important factors affecting the production function of chamomile under organic agriculture were leaf fertilizers, seeds, and machinery. The break even yield equivalent to the volume of production is 840 kg under conditions of organic agriculture. The study focused on identifying the most important factors affecting the production of a range of medicinal and aromatic plants, such as Marjoram, Paper mint, Geranium, Jojoba Under production conditions use chemical fertilizers or organic farms. To facilitate decision-making on production and use of available resources which would make better economic returns.

ESTIMATE PRODUCTION AND COSTS FUNCTIONS FOR THE MOST IMPORTANT MEDICINAL AND AROMATIC CROPS تقدیر دوال الإنتاج والتکالیف لأهم المحاصیل الطبیة والعطریة