THAKUR, B.S.SINGH, JAGSIR2017-06-142017-06-142013http://krishikosh.egranth.ac.in/handle/1/5810020028ABSTRACT The present investigations entitled “Studies on the performance of some newly introduced cultivars of apple (Malus × domestica Borkh.) under high hill conditions of Kinnaur (H.P.)” were carried out to study the performance of 9 apple cultivars at Progeny Cum Demonstration Orchard, Boktu, district Kinnaur for their suitability for commercial cultivation. The experiment was laid out in Randomized Block Design with five replications at a spacing of 3 x 3 m during 2011-2012. The observations were recorded on various growth parameters like plant height, plant spread, trunk girth, annual shoot growth, flowering, fruit set, fruit drop, yield and physico-chemical characteristics of fruit. Analysis of variance showed significant differences among all the cultivars for all the characters under study. Among different cultivars ‘Golden Spur’ recorded maximum increment in trunk girth (17.44 mm). Plant height (4.82 m), plant spread (4.58 m) and tree volume (45.97 m 3 ) was highest in ‘Red Chief’. The varieties namely Gale Gala, Coe Fuji, Red Fuji and Golden Spur had spreading tree habit while others had upright growth. Bud swell was earliest in ‘Golden Spur’ (23-03). The highest fruit set (88.00 %) was in ‘Golden Spur’ and lowest in ‘Oregon Spur-II’ (58.50 %). The spur varieties were early in maturity compared to the non spur varieties. Highest yield was recorded in ‘Oregon Spur-II’ (38.70 kg/tree). The varieties were characterized as dwarf (Scarlet Spur, Super Chief and Oregon Spur-II), semi-vigorous (Gale Gala, Coe Fuji, Red Fuji and Red Chief) and vigorous (Granny Smith and Golden Spur).ennullThesis