Proper fertilization in calcareous soil is necessary to enhance higher crop productivity. This was evaluated through a study that aimed to determine the outcome of the blended application of carabao dung and synthetic phosphorus on the response of mungbean in calcareous soil. To evaluate the correct amount of the blended application of aforesaid materials for effective growth and high seed yield of mungbean grown in calcareous soil. The experiment adopted six treatments such as T0 = No fertilizer application (control), T1 = 30-30-30 kg ha-1 N, P2O5, K2O, T2 = 2.5 t ha-1 carabao manure, T3 = 2.5 t ha-1 carabao manure + 10 kg ha-1 P2O5, T4 = 2.5 t ha-1 carabao manure + 20 kg ha-1 P2O5, and T5 = 2.5 t ha-1 carabao manure + 30 kg ha-1 P2O5. This was laid out in a Complete Randomized Design (CRD) with three replications. Soil analysis revealed that phosphorus application with carabao dung promoted the accumulation of soil organic phosphorus. Statistical analysis showed significant effects (p ≥ 0.01 & p ≥ 0.05) was achieved in all parameters gathered except on the period from sowing to heading and maturity, the production of seeds pod-1, root: shoot ratio, and harvest index. The blended application of carabao dung (2.5 t ha-1) and inert phosphorus regardless of dosage produced a remarkably higher number of pods plant-1 (6.13 – 11.53 pods±0.0000) and higher seed yield (0.70 to 1.40 g plant-1±0.0001) than unfertilized control. The combined application of carabao dung (2.5 t ha-1) and synthetic phosphorus (30 kg ha-1) is an appropriate fertilization strategy for mungbean production in calcareous soil to affect higher productivity.
Capote et al. (Wed,) studied this question.