A field experiment entitled "Impact of Irrigation and Fertigation Levels on Growth, Yield and Quality of Summer Chilli (Capsicum annuum L.)" was carried out during summer season of 2018, in split plot design having main plot treatments as drip irrigation levels viz. I1: at 0.7 ETc, I2: at0.8 ETc,I3: at 0.9 ETc, I4: at 1.0 ETc, and I5: at 1.1 ETc and Sub-plot treatments as fertigation levels viz. F1= 60 per cent of RDF, F2= 80 per cent of RDF and F3= 100 per cent of RDF with fifteen treatment combinations, replicated thrice. Results of the study indicates that the significant differences on chilli yield and quality attributes viz., per cent fruit set, fruit length, girth and number of fruits per plant were observed for different drip irrigation and fertigation levels. As drip irrigation levels between 80 to 100 per cent of crop evapotranspiration were found statistically at par with each other for fruit quality and yield of chilli, irrigation level of 80 per cent of crop evapotranspiration was found optimum among the all tested treatments. Whereas, for different levels of fertigation in eleven splits had significant effect on fruit quality and yield of chilli. Fruit quality and yield of chilli was found highest in F3 (fertigation with100% of RDF) treatment. Further fertigation levels with100 per cent of RDF and 80 per cent of RDF was found statistically at par with each other for the fruit quality and yield of chilli. Therefore, fertigation with 80 per cent RDF in eleven splits was found optimum. Interaction effect of different irrigation and fertigation level was found non-significant.

Crop models are useful for different purposes; primarily, to interpret experimental results and as research tools for research knowledge synthesis. Lengthy and expensive field experiments, especially with a high number of treatments, can be pre-evaluated through a well-proven model. Optimum management practices, either strategic or tactic, such as planting date, cultivar selection, fertilization, or water and pesticides usage, can be assessed through proven simulation models for making seasonal or withinseason decisions. The capability of AquaCrop model is tested and confirmed by various researches throughout the world. Findings of the field study were used to calibrate the AquaCrop Model for summer chilli in Marathwada region. Results from this study provided a set of first estimates for the calibration of the AquaCrop model on chilli for Marathwada conditions and for further testing and validation of the model at other agroclimatic conditions. AquaCrop model was calibrated by using field data of full irrigation treatment with harvesting index of 75% and water productivity 30 g/m 2 as there was close match between observed and simulated canopy cover with high value statistical parameter of R 2 NS =0.97 and CRM = -0.051. It was also cleared that the canopy cover was overestimated by model particularly during 36 to 84 DAT i.e. during development stage. But the scatter plot clears that as the canopy cover lie on both sides of 1:1 line, there was no consistent over or under estimation.

A field experiment entitled "Impact of Irrigation and Fertigation Levels on Growth, Yield and Quality of Summer Chilli (Capsicum annuum L.)" was carried out during summer season of 2018, in split plot design having main plot treatments as drip irrigation levels viz. I1: at 0.7 ETc, I2: at0.8 ETc, I3: at 0.9 ETc, I4: at 1.0 ETc, and I5: at 1.1 Etc and Sub-plot treatments as fertigation levels viz. F1= 60 per cent of RDF, F2= 80 per cent of RDF and F3= 100 per cent of RDF with fifteen treatment combinations, replicated thrice. Results of the study indicates that for different drip irrigation levels, the ascorbic acid content of chilli was found optimum with drip irrigation at 0.80 of crop evapotranspiration and fertigation with 80 per cent of RDF applied in eleven splits, with 20 per cent saving of irrigation water and fertilizer. Oleoresin content of chilli was not influenced by different drip irrigation levels, however, it was found to be optimum to fertigation with 80 per cent of RDF. The significant differences on dry matter yield and nutrient uptake were observed for different drip irrigation and fertigation levels. As drip irrigation levels between 80 to 100 per cent of crop evapotranspiration were found statistically at par with each other for dry matter yield and nutrient uptake by chilli, irrigation level of 80 per cent of crop evapotranspiration was found optimum among the all tested treatments. Whereas, for different levels of fertigation in eleven splits had significant effect on dry matter yield and nutrient uptake by chilli. Dry matter yield and nutrient uptake were found highest in F3 (fertigation with 100% of RDF) treatment. Further fertigation levels with100 per cent of RDF and 80 per cent of RDF was found statistically at par with each other for the dry matter yield and nutrient uptake. Therefore, fertigation with 80 per cent RDF in eleven splits was found optimum.

A field experiment entitled "Impact of Irrigation and Fertigation Levels on Growth, Yield and Quality of Summer Chilli (Capsicum annuum L.)" was carried out during summer season of 2018, in split plot design having main plot treatments as drip irrigation levels viz. I1: at 0.7ETc, I2: at0.8 ETc, I3: at 0.9 ETc, I4: at 1.0 ETc, and I5: at 1.1 Etc and Sub-plot treatments as fertigation levels viz.F1= 60 per cent of RDF, F2= 80 per cent of RDF and F3= 100 per cent of RDF with fifteen treatment combinations, replicated thrice. Results of the study indicates that the different drip irrigation levels on growth parameters and yield of chilli, drip irrigation levels between 80 to 100 per cent of crop evapotranspiration were found non -significant influence on the growth parameters and yield of chilli. Hence irrigation level of 80 per cent of crop evapotranspiration was found better among the all tested treatments. Whereas, application of different levels of fertigationin eleven had non-significant effect on plant height and plant spread of chilli at 30 and 60 DAT and found significant at 90 and 120 DAT. Yield of chilli was found highest in F3(fertigation with 100% of RDF) treatment. Further fertigation levels with 100 per cent of RDF and 80 per cent of RDF was found statistically at par with each other for the above growth parameters at various stages of crop growth and yield of chilli. Therefore, fertigation with 80 per cent RDF in eleven splits was found optimum. Interaction effect of different irrigation and fertigation level was found non-significant.