Impact of Vermicompost and PSB on Growth and Carboxylation Efficiency Variables of Custard Apple (Annona squamosa L.) cv. Balanagar

The experiment was conducted at the Fruit Research Farm, Department of Fruit Science, College of Horticulture and Forestry, Jhalawar (Rajasthan) to study the impact of Vermicompost and PSB on growth and carboxylation efficiency of custard apple (Annona squamosa L.) cv. Balanagar. The results revealed that application of Vermicompost @ 6kg + PSB 75g/plant had superior results with respect to maximum per cent increase in plant spread East- West (18.45 %) and North-South (17.92 %), plant height (18.60 %), canopy volume (35.01 %), leaf length (29.72 %), leaf width (26.29 %), increased number of shoots (16.00), scion girth (8.44 %), rootstock girth (8.67 %) and relative water content of leaves (75.77 %). The application of Vermicompost @ 6kg + PSB 75g/plant was also found contributing significantly in better carboxylation efficiency parameters viz., photosynthetic rate (6.40 ?mol CO m s 2 ?2 ?1), photosynthetic active radiation (1613.33 mmolm?2s?1 ), stomatal conductance (15.67 mmolm?2s?1 ), leaf temperature (38.10?C), relative humidity (5.93 %), internal CO2 concentration (292.00 ppm), transpiration rate (1.37 mmolm?2s?1 ) and minimum vapour pressure deficit (47.56 mb) under the present investigations during October, 2014 to April,2015.