The effect of longitudinal zonation patterns and macroinvertebrate responses to changes in habitat characteristics have been given a lot of attention. But studies of changes in macroinvertebrate assemblages along small upland undisturbed watercourses are still lacking.
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Showing items 1 through 9 of 17.-
Library ResourceJournal Articles & BooksDecember, 2016
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Library ResourceJournal Articles & BooksDecember, 2004
Genetically modified crops have met some consumer opposition domestically and abroad. This opposition has resulted in variety market and policy reactions with a large potential to disrupt trade and to become a focus of international negotiations. In this paper we consider the spillover from adopters to the non-adopters and non-consumers of GM technology. In the absence of any (organizational) transaction costs the assignment of property right to use the name corn will result in Pareto improving decisions with respect to the introduction of GM technology.
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Library ResourceJournal Articles & BooksDecember, 2004India, Brazil, China, Argentina
There are two mechanisms by which modern genetically modified organism (GMO) products can affect productivity in developing countries. The first is the Genes for Rent mechanism where a recipient country agrees with a GMO company to incorporate a GMO product (e.g., a Bt gene in cotton varieties) and pay a technology fee. The second is the Transgenic Breeding mechanism in which National Agricultural Research System (NARS) breeders use modern biotech methods marker-aided breeding, genetic maps, and genomics research to produce GMO traits of economic value in crop varieties.
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Library ResourceJournal Articles & BooksDecember, 2009India
In a multidisciplinary study, highly significant interactional effects were found among land use, livestock component, soil properties and rainfall. On an average, 16.2 to 82.2 tonnes of sediment yield kmâ2 and more than 90% of rainwater was retained in-situ in new land use systems as against 3621.3 tonnes of sediment and 66.3% rainwater retention in shifting cultivation, because of poor land cover. Good vegetation cover reduced the runoff load, resulting in significant reduction in the soil and nutrient erosion.
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Library ResourceJournal Articles & BooksDecember, 2016Pakistan
Water scarcity and land degradation are emerging threats to global food production. The dry land regions of world are affected by climate change to a greater extent and facing food insecurity. The current pattern of food production has been estimated to be inadequate to meet demands of growing population and required around 38% increase to meet world`s food demands by 2025. Food insecurity in erosion hit dry land regions of Pakistan also demands development of resource-efficient cropping systems to meet the food needs of population growing.
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Library ResourceJournal Articles & BooksDecember, 2014
The aim of this research was to present the land cover structure and landscape diversity in the West Polesie Biosphere Reserve. The land cover classification was performed using Object Based Image Analysis in Trimble eCognition Developer 8 software.
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Library ResourceJournal Articles & BooksDecember, 2004
Game theory and numerical simulation analyze the host government's role in strategically regulating intellectual property rights (IPRs) for agricultural biotechnology in a developing country. A foreign monopolist imports and sells a genetically modified crop variety that will offer the host country both selective productivity gains and a negative externality. In this small open economy, only some heterogeneous producers adopt the new variety. Public policy consists of IPR enforcement and a corrective tax.
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Library ResourcePolicy Papers & BriefsJune, 2010India
Human activities have exerted small to large scale changes on the hydrological cycle. The current scenario regarding groundwater resources suggests that globally there is a water crisis in terms of quantity (availability) and quality. Therefore there is a great need for the assessment and monitoring of quality and quantity of groundwater resources at local level. This paper presents a case study of the lower Shiwalik hills, in Rupnagar, Punjab, India, to trace land-use and land-cover changes during the past 17 years, with an emphasis on groundwater quality and quantity.
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Library ResourceJournal Articles & BooksDecember, 2004
This paper argues that current forms of agricultural biotechnology have significant potential for developing countries; the challenge is to realize this potential. We develop a conceptual model that explains why the yield effects of GMVs (genetically modified varieties) tend to be significant and reduce chemical use, contributing to human welfare, and present results from empirical studies that support these findings. We demonstrate that the adoption of GMVs might not necessarily lead to elimination of many varieties. Instead, crop biodiversity may be enhanced.
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Library ResourceJournal Articles & BooksDecember, 2009
In a river, the flow directly affects the physical and chemical properties of its water, with further consequences for aquatic biota. Land use practices and vegetation cover play a significant role in the water cycle. The wide-spread perception of forest cover, in terms of hydrology is that forests may reduce water runoff: although in rare instances the contrary has been reported. Water runoff varies seasonally and depends on the forest tree species. By no means can it be considered constant over large expanses of area or for various rainfall patterns.
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