Optimizing the Integrated Farming System of Coffee and Goat to Maximize Farmers' Income in North Sumatra, Indonesia

Most coffee farmers in North Sumatra still need to implement an integrated and goat cultivation system. Only 0.2% of have implemented the program. An farming system cannot be due limited resources, optimal conditions for plants livestock yet found. Therefore, this study aims determine maximize farmers' income. The sample size is six units spread across three districts: Simalungun, Tapanuli, Karo districts Province. Quantitative analysis using a linear programming model was carried out computationally with help LINDO 6.1 software. results show that revenue solution from integration generates IDR 169,358,700.00, 1.04% higher than actual This increase bean productivity 1.68 tons.ha-1 per year simple shading pattern, namely planting cover crop 300 trees ha, as well number goats kept. , condition 59.33 117 goats. Farmers are advised utilize all products between farms their respective production inputs not sell intermediate products.