Gramalet® Karet as a fertilizer formula special for rubber trees plant. Its contain complete essential ingredient such as macro nutrient ( N, P, K) , secondary nutrient ( Mg, S, Ca) and micro essential nutrient ( Zn, B, Bo, Cl, Mn, Fe) with composition 19-10-15-3-4-2 + micro element. The formula registered at Ministry of Agriculture Department Republik of Indonesia Number : T905/ BSP/ II/ 2003. Complete nutrient essential, which as tablet former on 10 grams make rubber tree planting need as same as 35 % than single fertilizer totally amount as usually farmer using like Urea, SP and Potassium and Potash. For example, 1 ( one) ha use 200 kg/ ha/ year only. Gramalet® Karet ( Compound Fertilizer) could increase efficiency and furthermore grows up farmer or estate income.