Optimization Model On The Use Of Agriculture Land In The Catchment Area Of Lake Toba

Abstract Different from the study optimization of land use model of a watershed that has been exist this research aims to get the model of the use of agricultural land in the lake Toba catchment area based on maximum economies advantage. Calculation of the maximum economical agricultural land use based on two things which are wide cropping who guided by land evaluation suitability and analysis of farmers agricultural commodities that are cultivated on the lake Toba catchment area. This research was conducted with methods of survey and regression analysis. The results show that there is diversity and farmer advantage and if sorted then mango red onion clovehazelnut bunded rice peanuts Arabica coffee cassava corn. Only 18 of the total 36 Land units on land area of study that suit to be area cropping commodities are tested with an area of 137847.90 ha. Land use in the catchment area of Lake Toba achieving profitability with optimal combination of farmer cropping mango 89.28 the onion 9.27 and bunded rice 1.45.