Most of Indonesian support line by farming, one common type of product is corn. Hawever in the conducted reseach area the people have not got enough economic a huntion. This research is intendend to analys the effect of land used, labour, seed, fertilizer towords corn production and to understand product elasticity as a function of cost. The data used in this research is the primier data based on the polling of 40 farmers. In Tigalingga district. Data analysis conducted by using Ordinary Least Square (OLS) method. The result of thained shawer that there are direct effect of labour, seed and fertilizer to words corn product. The product elasticity as a function of total cost shour that farming of corn in the research area decresing return to scale. The implication of this research, the Gaverment should educate the farmer in term of gaining production.
