The aim of this study was to determine the effects of different types of rice straw compost and soybean waste in different doses on the growth and efficiency of P uptake in maize plants. The design used was factorial RAK with control, the first factor was compost (P1 = rice straw; P2 = soybean oven), the second factor was dose (D1 = 5 tons · ha-1; D2 = 10 tons · ha-1; D3 = 15 tones, Ha-1; D4 = 20 tones, Ha-1) repeated three times. The results showed that rice straw compost with a dose of 5 tons. Ha-1 P1D1 treatment generally had an average plant height growth variable of 254.33 cm, a stem diameter of 16.11 mm, a number of leaves of 13.33 pot strands - 1 and 2 had leaf area of 6269.96 cm². In the P absorption efficiency, the variable P2 and D2 treatments have an average P intake value of 13.58 mg.kg-1 and a dose of 14.28 mg, kg-1 gave the optimal dose of straw compost 10.77 tons .ha-1 and soybean compost 13.13 ton.ha-1.
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