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Bohra, N. K.
- Growth and Biomass Accumulation in Eucalyptus Camaldulensis Irrigated at Different Water Regimes in an Arid Sandy Plain of India
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Indian Forester, Vol 134, No 5 (2008), Pagination: 611-621Abstract
A trial was initiated in July, 1995 to study the performance of Eucalyptus camaldulensis under different irrigation regimes on an arid sandy plain. Six treatment combinations of water quantity (W1 and W2) and watering frequency (I1, I2 and I3) were imposed. Irrigation schedule was maintained on the basis of IW/CPE ratio (Irrigation water/cumulative pan evaporation). Plant growth and biomass at 40-month age was high in I3W2 treatment where 45/ 60 mm of water per irrigation was applied with a total of 1935 mm (36 applications). Inspite of receiving more irrigation water, (2040 mm in 53 applications) growth and biomass accumulation by plants in I3W1 was less in comparison to plants in I3W2 treatment. Irrigation increased total dry biomass by 9 fold in I3W2 treatment over I1W1 treatment. Analysis of variance showed significant difference both at 5% and 1% level between the treatments. Incremental growth followed more or less the same trend in the first and second year but in the third year no significant variation was observed among treatments signifying absence of any treatment effect. More than six fold higher water use efficiency (WUE) was recorded in I3W2 over I1W1. Soil organic matter and electrical conductivity decreased significantly in all the treatments whereas, significant increase in pH was observed after 40 month of plant growth. Results of the study show that quantity of water added per irrigation is more important than the total irrigation input. I3W2 treatment provided more soil volume with favourable moisture condition for ischolar_mains where wetted ischolar_maining zone was more and thus resulted in better growth and biomass production.Keywords
Eucalyptus camaldulensis, Arid Zone, Biomass, Irrigation, Water Use Efficiency- Socio-economic Conditions with Special Reference to Common Access Resources: a Case Study from Gujarat and Rajasthan
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Indian Forester, Vol 130, No 9 (2004), Pagination: 981-990Abstract
A total of 66 villages were surveyed from six types of degraded land areas in arid and semi-arid parts of Rajasthan and Gujarat. Availahility of common access resources (CARs) i.e. Gaucher/Oran and Community wasteland varied from 4% in Johrheed (Bikaner) to 93% in Ramgarh (Jaisalmer) of Rajasthan. Arahle farming and animal husbandry are the main occupation in the area with very high cattle population. 62-100% household fall under the category of marginal land holding (<5 acres) and are totally dependent upon CARs for getting fuel , fodder and even food. The average fuelwood and fodder requirement per household in the area were worked out to be 3.46 tonnes and 2.07 tonnes per year , respectively. To meet this requirement on sustainable basis , productivity of the available CARs need to be maintained at 4.2 tonnes ha-1 yr-1. Female members of the family and children mainly carry out collection of fuel and fodder for which they devote 30 to 40 % of their time.- Production and Decomposition of Litter in Plantation Forests of
Eucalyptus camaldulensis Along Canal Command Area in Indian Desert
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Indian Forester, Vol 136, No 2 (2010), Pagination: 163-172Abstract
Litter production varied greatly with plantation age and stem density in E. camaldulensis being high in 12-year-old plantation (6087 kg ha-1). Lowest litter production was in 4-year-old plantation (2042 kg ha-1). Bimodal pattern of litter fall was observed in younger plantation where, two peaks of varied intensity were observed in summer and winter. Overall, litter production was more in summer. Component wise, leaf litter accounted for the major part of the total litter production. It varied from 64% in 17-year-old plantations to 73% in 8-year-old plantations. Woody litter component varied from 16% to 23% in different age plantations. Bark litter also constitute a significant proportion of the total litter production rangingfrom 9-13%. Value of decomposition constant (k) was 0.1508, signifying very slow rate of decomposition. A significant positive relationship between annual total litter production and girth at breast height (GBH) as well as tree height was observed. Conclusively, lowrate of decomposition signified slow rate of nutrient turnover.Keywords
Litter, Eucalyptus camaldulensis, Decomposition, Aridzone, Plantation- Assisted and Natural Regeneration of Eucalyptus in Arid Tract of Rajasthan
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Indian Forester, Vol 138, No 7 (2012), Pagination: 660-661Abstract
No abstract- Response of Ailanthus excelsa to N and P Fertilization on an Arid Sandy Soil
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Indian Forester, Vol 120, No 4 (1994), Pagination: 368-373Abstract
A field experiment was conducted to investigate the effect of varying levels of nitrogen (0, 9 and 18g N per plant) and phosphorus(0, 3 and 6 g P2O5, per plant) in factorial combinations, on the growth of Ailanthus excelsa planted on an arid sandy soil in Rajasthan. Nitrogen application at the rate of 9g N per plant improved the plant height by 24 per cent when recorded after one year of plantation. Phosphorus application at the rate of 6 g P2O5 per plant improved the ischolar_main length by 27 per cent and ischolar_main spread five folds after one year of plantation. Preplant application of 9g N combined with 6g P2O5, per plant was the best treatment which improved the height of two year old trees from 144 to 213 cm.- Biodrainage for Restoration of Canal Command Waterlogged Area in Indian Desert
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Affiliations
1 Division of Forest Ecology, Arid Forest Research Institute, New Pali Road, Jodhpur – 342005, IN
1 Division of Forest Ecology, Arid Forest Research Institute, New Pali Road, Jodhpur – 342005, IN