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A study was conducted at Hi-Tech Unit, Department of Horticulture, Rajasthan College of Agriculture, MPUAT, Udaipur during 2017 and 2018 to evaluate the effects of different nutrient sources on post harvest soil fertility status in cucumber under Naturally Ventilated Polyhouse. The present study comprises eight treatment combinations with four replications under completely randomized design. From the study, it was found that application of 50% organic management through innovative approaches and 50 % RDF through organic fertilizers resulted in maximum production of cucumber and maximum uptake of macro nutrients by the cucumber plants. It is also confirmed that treatment T7 (50% organic and 50% inorganic fertilizer) improved the post harvest soil fertility status for next crop with better quality produce.

The present investigation was carried out at Hi-Tech Unit, Department of Horticulture, Rajasthan College of Agriculture, MPUAT, Udaipur. The twelve treatments comprising of various combinations of 4 levels of boron, i.e., B 0 - 0, B 1 - 100, B 2 - 150 and B 3 - 200 ppm and three spray application times, i.e., D 1 - 30, D 2 - 45 and D 3 - 60 DAS. The treatments for beetroot crop were evaluated with three replications under factorial randomized block design. The experimental results show that different concentrations of boron, application times and their combinations significantly affected yield and quality of beetroot. Among treatments with different concentration of boron maximum yield per plot (45.44 kg), yield of root (454.45 q/ha), dry matter (18.08 %), protein on dry weight basis (2.54 %), ascorbic acid content (3.48 mg 100g-1), total soluble solids (16.10 oBrix) and beta carotene content (1438.34 IU) were recorded with treatment B3D1 (200 ppm boron spray at 30 DAS) and alsosignificantly produced higher gross return (₹ 238340.00), maximum net return (₹ 170230.00) and benefit cost ratio of 2.50, i.e., generating highest net return of ₹ 2.50 per rupee invested.

Shelf life of custard apple is limited due to climacteric nature. In the present study, two application methods along with different concentration of hexanal formulations were used, first hexanal vapour at different concentrations (0.005, 0.01, 0.02, 0.05% v/v) and second hexanal dip (0.5, 1, 1.5, 2% v/v) along with control were evaluated on custard apple dipping fruits for 2 min and 4 min and store at ambient temperature (27±2ºC). Hexanal filter paper dip in 0.05% concentration effectively maintained the firmness, total sugar, reducing sugar, preserved L*, a*, b* value, extend shelf life and maximum BC ratio during storage from day 1 to days 14 as compare to control. Therefore, we concluded that hexanl vapour(0.05%) was effective to use post harvest technology for custard apple.

An experiment was carried out on study of genetic variability in 30 genotypes of ivy gourd at Horticulture Department of Rajasthan College of Agriculture, MPUAT, Udaipur during July to September 2017. Twelve Growth and quality characters were studied. The analysis of variance indicated that the mean sum of square due to genotypes were highly significant for all the characters suggesting the presence of good deal of variability in material studied. High magnitude of genotypic as well as phenotypic coefficient of variations were recorded for traits viz., petiole length (27.63% and 29.93%), inter nodal length (22.73% and 23.40%), leaf width (22.63% and 23.35%) and leaf width (22.52% and 23.56%) and highest heritability recorded for inter nodal length (94.30%) followed by leaf length (93.92%), leaf width (91.37%), ascorbic acid (89.48 %), petiole length (85.17%), fruit weight (82.10%), fruit length (79.98%) and chlorophyll content in leaves (78.23%).The highest genetic gain was recorded for petiole length (52.52%) followed by viz., inter nodal length (45.47%), leaf length (45.17%), leaf width (44.34%), fruit weight (34.21%), fruit length (28.24%) fruit diameter (23.31%) & genetic advance were also higher for some characters. Availability of high GCV & PCV shows presence of sufficient genetic variability for evaluated traits. This indicates that there is an ample scope of selection in the present gene pool for yield and its components.

The experiment was carried out with 30 genotypes in completely randomized block design with 3 replications to study the association among fruit weight and its components and their direct and indirect influence on total marketable fruit weight of ivy gourd at Department of Horticulture, Rajasthan College of Agriculture, Maharana Pratap University of Agriculture and Technology, Udaipur during kharif season 2017–18 in completely randomized design with three replications. Correlations study revealed that phenotypic correlation coefficient was slightly higher than corresponding value of genotypic correlation for majority of the characters. Fruit weight has highest significant positive correlation with total chlorophyll and significant negative correlation with fruit volume. The correlation between phosphorus and fruit diameter was negative significant. Path analysis study revealed that average leaf length has showed highest positive direct effect on fruit weight followed by total chlorophyll content in leaves, petiole length, ascorbic acid content whereas, moisture, inter nodal length, fruit length, leaf width showed negative direct effect on the fruit weight.