The present investigation was conducted in order to examine the effect of spacing and pruning on chlorophyll a' and 'b' content and NPK content of leaves of guava cv. Hisar Safeda. In this experiment two levels of pruning viz no pruning and 50% shoot pruning of last season growth were done in the month of April in guava trees spaced at nine different spacing viz. 6×2 m, 6×3 m, 6×4 m, 6×5 m, 5×2 m, 5×3m, 5×4 m, 5×5 m, 6×6 m. Observations revealed that leaves chlorophyll 'a' and 'b' content and NPK content were significantly increased with increasing the spacing and pruning levels. Highest chlorophyll content and leaf NPK content were registered in widest spacing at 6×6 m with pruned trees during both the seasons. Whereas lowest chlorophyll 'a' and 'b' content and leaf NPK content were found in closest spacing at 5×2 m with non-pruned trees.

during the year 2018-19. The experiment was laid out in Factorial Randomized Block Design with three replications and three cultivars. The plant height (5.82 m), stem girth (63.7 cm) and spread of plants (6.24 x 5.92 m) were found maximum in NB-7. The flowering started from 1 st week of June to third week of June in cultivar NB-5 and I st week to 2 nd week of June in NB-7 and NB-9. The maximum fruit weight (2.50 kg) was observed in NB-7. Whereas minimum fruit weight (1.32 kg) was recorded in NB-5. Maximum TSS (30.2%) was recorded in NB-9 followed by NB-5 (29.7%). However, maximum yield (52 kg) was recorded in NB-7 and minimum (23 kg) in the NB-5.

The experiment comprising of eleven treatments of nutrients and growth regulator was conducted on seven years old plants at Experimental Orchard of the Department of Horticulture, CCS Haryana Agricultural University, Hisar during the year 2019-20 to study the effect of urea, ZnSO4 and NAA on fruit cracking and yield of pomegranate. The data were recorded on fruit cracking, number of fruits per plant, fruit yield, average fruit weight, fruit length, fruit breadth, fruit volume, and specific gravity. The recorded data were subjected to statistical analysis using RBD. The result of the experiment indicates that the foliar application of urea, ZnSO4, and NAA had a significantly positive effect on most of the recorded parameters. The maximum potential of pomegranate plants in respect number of fruits per plant (122.3), fruit length (8.10 cm), fruit breadth (7.20 cm), average fruit weight (252.3 g), fruit yield (30.8 kg/plant) and fruit volume(305 ml) was exploited to a maximum level and specific gravity (0.82 kg/m 3 ) to a minimum level with foliar application of urea 1.0% + ZnSO4 0.5%. The lowest fruit cracking of pomegranate was recorded within the foliar application of ZnSO4 at 0.5% concentration.

No abstract