Organic manures in combination with biochar might improve efficacy of biochar in improving soil functions related to hydro-physical properties and a field experiment was conducted over the course of two years with two levels of biochar @ 0 and 2tha⁻¹ and four levels of compost (100% recommended dose of N through farm yard manure, 100% recommended dose of N through vermicompost, 50% recommended dose of N through farm yard manure, and vermicompost each, and unfertilized control). Each treatment was replicated three times in factorial randomized block design (RBD). The objective of this research was to determine the effects of biochar and compost on soil hydro-physical properties, water use efficiency, monetary returns and yield of knolkhol (Brassica oleracea var. gongyloides L.) under sub-tropics of North West India. Compared with no-biochar, application of biochar significantly increased knolkhol yield by 7.8% and soil properties (infiltration rate, aggregate stability, maximum water holding capacity and hydraulic conductivity). Similarly, integration of compost significantly enhanced the soil water retention, aggregate stability, hydraulic conductivity and crop yield and gave highest infiltration rate, water retention, hydraulic conductivity and crop yield under M3 (50 % N through farm yard manure, +50 % N through vermicompost) treatment. Furthermore, synergetic positive effect of biochar and compost were noted for soil infiltration rate (4–38%), water retention (0.9–13.7%), aggregate stability (6–10.7%) and yield (6–11.9%) over the sole application of compost. Combined use of farm yard manure, and vermicompost accompanied by biochar resulted in highest net returns and B:C ratio. Biochar in combination with farm yard manure, and vermicompost can enhance soil hydraulic properties resulting in increased crop yield and maximum monetary returns under subtropical conditions.

有机肥料与 biochar 结合可能会提高 biochar 在改善与水物理特性相关的土壤功能方面的功效，并且在两年的时间里进行了一项田间试验，使用两种水平的 biochar @ 0 和 2tha ^-1以及四种水平的堆肥（ 100% 推荐剂量的农家肥、100% 推荐剂量的蚯蚓粪、50% 推荐剂量的农家肥和蚯蚓粪，以及未施肥控制）。每个处理在因子随机区组设计 (RBD) 中重复 3 次。本研究的目的是确定生物炭和堆肥对土壤水物理特性、水分利用效率、货币回报和 knolkhol ( Brassica oleracea var.弓形体L.) 在印度西北部的亚热带地区。与无生物炭相比，使用生物炭显着提高了 7.8% 的酚醛树脂产量和土壤特性（入渗率、聚集体稳定性、最大持水量和导水率）。类似地，堆肥的整合显着增强了土壤保水性、团聚体稳定性、导水率和作物产量，并在 M3（通过农家肥的 50 % N，通过农家肥的 +50 % N蚯蚓粪）处理。此外，生物炭和堆肥对土壤入渗率（4-38%）、保水性（0.9-13.7%）、聚集体稳定性（6-10.7%）和产量（6-11.9%）的协同积极影响堆肥的应用。结合使用农家肥，伴随生物炭的蚯蚓堆肥导致最高的净回报和 B:C 比率。生物炭与农家肥和蚯蚓堆肥相结合，可以增强土壤水力特性，从而在亚热带条件下提高作物产量和最大的经济回报。