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by
Kamaljit Kaur |
Total Records (
4 ) for
Kamaljit Kaur |
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Kamaljit Kaur
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John Rolfe
and
Owen Stanley
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Clearing trees to develop land for exotic pastures that enhance pasture production and hence the
financial gains, is an important issue in Queensland. Gains from clearing woodlands are questioned. Three tree
communities i.e. Acacia harpophylla, Eucalyptus melanophloia and Eucalyptus populnea were selected at
three different ages of clearing i.e. 5 yr, 11-13 yr and 33 yr to collect the data on pasture production, soil
properties (biological and physicochemical), litter production and nutrient recycling and pasture plant diversity
over 2-3 year period of the study. The net economic gains from clearing in terms of pasture production were
compared to uncleared pastures and assessed against the tradeoffs of ecological services. The increase in
pasture production post-clearing was not consistent with age of clearing. A bioeconomic model, applied to
predict pasture production over the 50 years of time of clearing, though suggested economic benefits, however,
it is difficult to predict how the loss in ecosystem functions in cleared pastures (> 30 years of clearing), by
implication, affect pasture yield over time.
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Kamaljit Kaur
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Tropical savannas are mainly used for grazing, mining, conservation or Indigenous activities. Over
the past years, grazing has proven to be economically inefficient and has led to depletion of natural resources.
This study attempts to develop a framework for multiple uses of land resources in savannas. For this, alternative
land uses of savannas, other than grazing are identified and an outline of economic framework to estimate the
total benefits from various land uses is presented. This study addresses the importance of synergies among
various land uses at a landscape level. Economic viability of each land use is proposed to be verified to develop
sustainable multiple land use systems that could deliver the maximum benefits to the society. Externalities, both
positive and negative are considered in total estimation of benefits at a landscape scale. The positive effect of
one land use on another can help to enhance the landscape value and to optimize the use of various natural
resources for sustainable production gains.
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Kamaljit Kaur
,
Rajesh K. Jalota
,
David J. Midmore
and
Kerry Walsh
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Forest clearing, a topical issue the world over, historically occurred at a high rate in Queensland to ostensibly increase pasture production. Our research evaluates the impact of clearing on selected soil biological properties (i.e. total soil respiration, root respiration, microbial respiration and microbial biomass (C and N)). Three major woodland communities of central Queensland region i.e. Eucalyptus populnea, E. melanophloia and Acacia harpophylla were selected for paired comparisons between sites that had, or had not, been cleared of trees to develop land for exotic pastures. The cleared sites representing three different time periods since clearing (5, 11-13 and 33 years) were used to determine the temporal impact of clearing on soil biological properties. Cleared and uncleared sites did not differ in annual or seasonal rates of soil respiration. The average annual rate of CO2 emission across all treatments was 0.11 g CO2/m2.h. Microbial respiration and microbial biomass (measured in January 2002) were, however, greater at uncleared than at cleared sites and conversely, root respiration (for roots from herbaceous plants) was greater at cleared than uncleared site. The Q10 value of 1.42 (measured for different seasons over a year) suggested some response of soil respiration to soil temperature, which is less compared to that in temperate climates possibly due to the limited availability of soil moisture or organic matter in the semi-arid climates of central Queensland. |
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R.S. Singh
,
B.S. Sooch
,
Kamaljit Kaur
and
J.F. Kennedy
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The present study was carried out at flask level for the fermentative
production of citric acid from cheddar cheese whey using a yeast culture Metschnikowia
pulcherrima NCIM 3108. Clarified and unclarified whey with and without
nutrient supplementation was screened for citric acid production. The order of
citric acid production was supplemented unclarified whey>supplemented
clarified whey>unclarified whey>clarified whey. The effect of various
process parameters was investigated to maximize the citric acid production from
supplemented unclarified whey. The lactose concentration of 6.0% (w/v) at pH 6.0
with an inoculum size 10% (v/v) of 48 h old culture at 30°C supported the
maximum concentration of citric acid production after 5 days of incubation
period. The agitation of the yeast culture suppressed the citric acid production
to a little extent as compared to stationary conditions. |
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