Abstract
The influence of root collar diameter of ten months old nursery raised seedlings on first year out planting survival and growth of Grewia optiva and Ulmus villosa was evaluated. Both the species were planted in field during the first week of January, 1997. Initial root collar diameter at planting ranged from 2.83 to 6.24 mm for Grewia optiva and 3.01 to 7.10 mm for Ulmus villosa. After one growing season, results showed a significant relationship of root collar diameter to out planting survival and growth, viz., height and collar diameter increment, shoot and root dry weight and leaf nutrient contents (N, P, K) of both Grewia optiva and Ulmus villosa. Root collar diameter had significant effect on out planting survival of Grewia optiva while the same was not good predictor of out planting survival of Ulmus villosa after one growing season.
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