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Dixit, R. K.
- Performance of Exotic Dry Zone Hardwoods in Salt Affected Semi-arid Regions of Uttar Pradesh
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Indian Forester, Vol 130, No 2 (2004), Pagination: 200-206Abstract
Forestry activities in semi-arid regions of Uttar Pradesh are of great importance to meet the fuel, fodder and timber demand of local people. An international trail of dry zones hardwood species was carried out in Vrindavan forest block, Mathura, for screening a wide range of species, suitable for use in rural afforestation schemes and agroforestry systems. The results of the 8 year old trial showed that species adapted for region are Guazuma ulmifolia, Senna atomaria, Caesalpinia velutina , Parkinsonia aculaeta, Gliricidia sepium, Leucaena leucocephala, Mimosa tenlliflora, Caesalpinia coriaria etc. Most of these species are nitrogen fixing legumes and hence will be useful in improving the soil characteristics.- Effectiveness of Different Seed Extraction Methods on Seed Value from the Cones of Pinus radiata
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Indian Forester, Vol 126, No 9 (2000), Pagination: 936-942Abstract
Cones of radiata pine or Pinus radiata are serotinous. The cone scales are stuck together by resin making natural seed release impossible for many years. In the present study cones were subjected to various heat treatments viz. Heated in a kiln at 65°C for 8 hours, heated in a microwave oven set at high poser for 60 seconds or submerged in boiling water of 120 seconds. Subsequent rate and extent of seed release was observed on day 1,3,6 and 7. Maximum and quickest seed release was observed following the kiln treatment. Seed viability assessed by Tetrazolium Test (TZ) and relative seed vigour assessed by Accelerated Aging (AA) test both showed that seed extracted by the kiln method was superior to that obtained by either of the other two methods. The effectiveness of suitable methods of extraction of seeds from cones of P. radiata in the light of economic importance is discussed.- Phosphorus Response and Toxicity in Acacia spp.
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Indian Forester, Vol 125, No 8 (1999), Pagination: 770-774Abstract
Three species of Acacia were grown using a range of P rates in a peat/sand (1:1) media. Seedlings were grown in 1 litre pots in a greenhouse. Severe P toxicity occurred in A. baileyana and A. cardiophylla when P rates supplied from 5-6 month, Osmocote 0-18-0 fertilizer exceeded 20g P/m3/month. Toxicity was indicated by severe stunting and often iron chlorosis of the tip growth. The third species was A. pravissima which was tolerant of P levels approximately double (and even higher) those tolerated by the former species. All three species showed increases in the growth parameters measured of stem diameter, height and foliar dry matter when the P application was increased from nil to 10g P/m3/month.- Significance of Tree Crown Diameter in Forest Mensuration
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