The Properties of Rice Stubble Compost and Its Effects on Okra Yield (Abelmoschus esculentus L.), Nutrient Activation Coefficient, and Organic Carbon Fractions in Soil
A compost experiment combining rice stubble, rock phosphate and cow dung found CP4 (40:30:30) had the most favourable compost properties and produced 97.1 mg/kg available soil phosphorus after okra. Compost increased phosphorus activation and very labile carbon versus control, but compost formulations did not differ in pod yield or N/P uptake. The main signal is soil improvement, not superior yield from one formula.