Abstract
A field experiment was conducted to assess the effect of petroganic organic and inorganic fertilizer application aimed to increase soybeans productions in dry land. This experiment is carried out in Keloka, Batujai village, Central Lombok. The experiment consists of two factors using splitplot design, organic fertilizer as main plot with two level which is the application 20 tons/ha of organic fertilizer (petroganic) and without application of organic fertilizer. Compound inorganic fertilization as sub-plot which consists of five levels, they are without phonska (control), 25%, 50%, 75%, and 100% NPK recommendation. The results of the experiment showed that there is no interaction between organic with inorganic fertilizer to the soybeans yield, but both organic fertilizer and inorganic fertilizer gave different effect to the fresh and dry weight, 100 seed weight and yield. Inorganic 50% NPK recommendation fertilization is the best in increasing the fresh weight (83,30 kg/plot), dry weight (64,49 kg/plot), 100 seed weight (42,75 g) and yield (4,55 kg/plot) which is equal to 3,16 tons/ha.
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