Integrating organic manure and natural phosphate for sustainable long bean (Vigna sinensis L.) cultivation on marginal soils

Long bean (Vigna sinensis L.) is a legume widely cultivated for its high nutritional value and economic importance. However, marginal podzolic soils in regions such as Riau, Indonesia, pose challenges for sustainable agriculture due to low nutrient availability and high acidity. This study evaluates the integration of quail manure and natural phosphate fertilizers as a sustainable soil management strategy to enhance soil health and crop productivity. A factorial randomized complete block design was implemented with three levels of quail manure (0, 1.5, and 3 kg/plot) and natural phosphate (0, 12.5, and 25 g/plant) across 27 experimental plots. The effects of these amendments on soil properties, plant growth, and yield components were assessed using analysis of variance and Duncan’s multiple range test. Results demonstrated that the combined application of quail manure and natural phosphate significantly improved plant growth parameters and soil fertility. The findings suggest that integrating organic and natural fertilizers enhances crop productivity while reducing dependence on synthetic inputs, offering a promising approach for sustainable agriculture on degraded soils.