<![CDATA[The aim of this research was to know the effect of interaction of giving oil palm stem compost and NPK pearl fertilizer on growth and production of corn. The research was conducted at the experimental farm of Faculty of Agriculture Riau Islamic University Pekanbaru during four months from July to October 2011. The experiment was arranged in the completely randomized design with two factros. The first factor was compost of oil palm stem (K) and second factor was NPK pearl application (D). The observated parameters were plant height, leaf width index, flowering age, harvested age, harvested index, cob production per plant, and seed number of cob. The application of oil palm stem compost and NPK pearl interactionally showed a difference of harvested index parameter with the best treatment of K2D3 (300 g/plant and 15 g/plant) namely 138.4. The application of oil palm stem compost only showed a difference on harvested index with the best treatment of K2 (600 g/plant) namely 119.3. The application of NPK pearl only showed a difference on plant height with the best treatment of D3 (15 g/plant) namely 222.6 cm. The best treatment for leaf width index was D3 915 g/plant) namely 639.2 cm, for harvested age was D3 (15 g/plant) namely 66.83 day after planting, for harvested index was D3 (15 g/plant) namely 124.6, for cob production per plant was D3 (15 g/plant) namely 368.5 g, and for seed number per cob was D3 (15 g/plant) namely 722.6 seeds.]]>
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