Chromolaena odorata Compost Affected Soil Chemical and Rice Crop (Oryza sativa L.)

The study entitled "Chromolaena odorata Compost Affected Soil Chemical and Rice Crop (Oryza sativa L.) had
been conducted in Padang City, West Sumatra. It was started in February 2015 to May 2015. The study aimed was to examine the mechanism of amendment soil chemical properties and nutrient uptake of rice crop was fertilized By Chromolaena odorata Compost. The experiment was conducted by using Randomized Complete Design (RCD) in Split Plot Design with the main plots were three varieties of rice crops namely; Cisokan (V1); Pandan Wangi (V2)
and Red Cempo (V3). The subplot consisted three types of fertilizer composition; 5 Mg ha-1 Compost C. odorata
(CCP) +100% Artificial Fertilizer Recommendation (AFR) (F1); 7.5 Mg ha-1 CCP+75% AFR (F2); 10 Mg ha-1 CCP
+50% AFR (F3), with three replications. Data was analysed by using the F test significance level of 5%, and an
Honestly Significant Difference test (HSD) α 5%. Parameters include analysis of soil chemical properties, manure, analysis of nutrient uptake and the weight of dry crop biomass. The study indicated there was amendment in soil chemical properties after the application of C. odorata, compost achieving optimal fertility for rice crops. Nitrogen and other minerals uptake in rice crops increased due to the increased provision of artificial fertilizers escorted by lowering the dose of C.odorata compost. The ability of the nutrient uptake of the rice crops is higher in rice Pandan Wangi and causes a higher forage yield than rice Cisokan or Red Cempo.