KRISHNAMURTHY, K NMEGHA, E2023-02-032023-02-032020-10-19Th-12638https://krishikosh.egranth.ac.in/handle/1/5810193156A field experiment on long term fertilizers under finger millet-maize cropping sequence has been in progress since 1986 at University of Agricultural Sciences, GKVK, Bangalore. These experiments provide an insight for scientific investigation of structural relationship that governs the variability of specified crop over a period of time. The experimental data on grain yield of maize and various soil characteristics for a period of 32 years was procured to study the performance of maize yield under different fertilizer treatments over a period of time. Profile analysis has been performed and results indicate that all the treatments differ significantly i.e., there is significant interaction between year and treatments. Available nutrients in soil such as nitrogen, phosphorous, potassium, sulphur zinc, manganese, iron as well as organic carbon were having significant effect. Only copper showed non-significant correlation with yield. Path coefficient analysis was used to study direct/indirect effect of soil parameters with yield. Balanced (NPK) nutrients were having better association (low residual effect) with yield. Higher residual effect was noticed with higher dose of balanced nutrition (150% NPK) and also with imbalanced nutrition (-K, -PK) indicating poor association. The analysis of beta-convergence showed evidence of statistical convergence in yield of different treatments.EnglishThesis