@article{Barus_Ernawati_Wardani_Pujiharti_Suretno_Slameto_2023, title={Improvement in soil properties and soil water content due to the application of rice husk biochar and straw compost in tropical upland}, volume={12}, url={https://oiccpress.com/international-journal-of-recycling-of-organic-waste-in-agriculture/article/improvement-in-soil-properties-and-soil-water-content-due-to-the-application-of-rice-husk-biochar-and-straw-compost-in-tropical-upland/}, DOI={10.30486/ijrowa.2022.1942099.1355}, abstractNote={Purpose Rice biomass waste can  be used as a soil amendment. This study examined the effect of the application of rice husk biochar and straw compost on several soil properties and yields of rice and soybeans in tropical upland. Method  Field experiments were carried out with two applications of rice husk biochar and straw compost on upland rice and soybean cultivation, respectively. Three-levels of rice husk biochar application (5, 10, and 20 t ha-1) and straw compost (5 t ha-1) along with the control. The changes in soil chemical properties like pH, C, N, CEC, P, K, Mg, Ca, Na, and physical properties including soil bulk density, particle density, total porosity, macropores, micropores, permeability, and soil water content at various pressures were measured. The grain yields of rice and soybean were also recorded. Results Total-C and exchangeable-K increased after the second application of rice husk biochar and straw compost. There was a significant improvement in total porosity and micro-pores, soil water content especially at PF 2.54 (0.33 Pa) and PF 4.2 (15 Pa), and increased soybean yield compared to control. Based on the overall results, we got a significant effect of rice husk biochar at higher doses (10 and 20 t ha-1). Conclusion The application of rice husk biochar (at doses 10 or 20 t ha-1) and straw compost 5 t ha-1 gave a positive effect on several soil properties including total-C, soil porosity, and soil water content, especially at pF 2.54 and pF 4.2, and also increased soybean yields. Highlights Rice biomass waste as rice husk biochar and straw compost can be used as a soil amendment Their use improve several soil properties including total-C, soil porosity, and soil water content especially at pF 2.54 (0.33 Pa) and pF 4.2 (15 Pa) Their use increase the yields of soybean crop }, number={1}, journal={International Journal of Recycling of Organic Waste in Agriculture}, publisher={OICC Press}, author={Barus, Junita and Ernawati, Rr Ernawati Rr and Wardani, Nila and Pujiharti, Yulia and Suretno, Nandari Dyah and Slameto, Slameto}, year={2023}, month={Nov.}, keywords={Rice biomass waste, Soil Chemical Properties, Soil physical properties, Soybean, Upland rice} }