Stability of yield in response to integrated nutrient management practices in rice bean (Vigna umbellata)

Abstract

Eight statistical measures were used to identify the best combination of inorganic fertilizers and two bioinoculants in rice bean tested over eight environments. Four statistical measures namely, coefficient of variance (CV), geometric adaptability index (GAI), sustainability index (SI) and deviation from regression (Sd 2) values were found to be the most appropriate and identical in identifying the best treatment over the locations. Based on the mean seed yield and the three statistical measures, treatment T12 [100% recommended dose of fertilizer (RDF) + phosphate-solubilizing bacteria (PSB) + Rhizobium] was the best, followed by treatment T11 (75% RDF + PSB + Rhizobium). Based on the mean seed yield treatment T2 (100% RDF) was the second best but was not stable over the locations. The inoculants Rhizobium and PSB increased and stabilized the yield over locations as compared to control.