Nutrient Management Strategies for Groundnut-blackgram Cropping Sequences

Aims: To refine nutrient management practices for the groundnut-blackgram cropping sequence, focusing on enhancing both yield and quality.

Study Design: The experiment was conducted in a split-plot design with three replications.

Place and Duration of Study: Regional Research Station in Vridhachalam during the Kharif and rabi season of 2016-17.

Methodology: The experimental encompassed various nutrient levels applied to groundnut in the main plots: M1-Control, M2-100% RDF, M3-125% RDF, and M4-150% RDF. Additionally, different nutrient levels were applied to the blackgram subplot: S1-Control, S2-50% RDF, S3-75% RDF, and S4-100% RDF.

Results: Analysis of the results indicated that use of 125% RDF in groundnut significantly provide higher pod yield (2657 kg/ha). However, the control group recorded a significantly lower pod yield. Subsequent blackgram seed yield was notably influenced by inorganic fertilizers applied to the preceding groundnut crop. In blackgram, the application of 75% RDF resulted in a higher number of pods per plant (34.6), No. of branches/plant (7.8) and seed yield (823 kg/ha). This performance was comparable to the application of 100% RDF

Conclusion: These findings underscore the importance of optimizing nutrient management practices, particularly the combination of 125% RDF for groundnut, to enhance pod yield, while the application of 75% RDF demonstrated positive effects on subsequent blackgram seed yield.