Performance Of Soybean Glycine Max L Varieties In Response To Levels Of Phosphorus On Lahar Laden Condition

This study was conducted to determine the growth and yield performance of soybean varieties in response to levels of phosphorus under lahar-laden condition. The treatment combinations of phosphorus (P2O5) levels and soybean varieties were arranged using the procedure in Split Plot in Randomized Complete Block Design (RCBD) with four replications. All gathered data were analyzed using the Statistical Tool for Agricultural Research (STAR) through the analysis of variance (ANOVA).Among soybean varieties, PSB SY 6 (V3) and CL Soy 1 (V1) had a positive effect on computed seed yield per hectare, seed yield per plant, shelling percentage, weight of pods, number of pods per plant, number of filled pods and plant height, whereas the greatest number of unfilled pods was recorded from PSB SY 2 (V2). No significant findings were seen in terms of root length and number of seeds per pod among varieties. On the other hand, application of soil recommendation (T2) and fertilizer recommendation + 80KG P2O5 (T4), regardless of the variety, attained the highest computed seed yield per hectare, seed yield per plant, weight of pods, number of seeds per pod, number of pods per plant and number of filled pods per plant. Longest root length and most number of unfilled pods were recorded from the control (T1). Plant height and the longest root length were recorded from plants applied with soil recommendation + 40KG P2O5 (T3). There were no significant differences observed for shelling percentage and weight of 100 seeds.There was no interaction effect on the weight of 100 seeds and root length; however, the highest computed seed yield per hectare was recorded from PSB SY 6 (V3) applied with fertilizer recommendation + 80KG P2O5 (T4). The same treatment combination got the highest value with the lowest shelling percentage, most number of filled pods and heaviest 100 seeds.Cost and return analysis of computed seed yield per hectare showed that PSB SY 6 (V3) under lahar-laden condition registered the highest ROI among other varieties with 102.03% ROI. Regardless of the variety, soil sample recommendation (T2) fertilization marked the highest income among the treatments with Php 22,878.00 per hectare and ROI of 111.31%.