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Stephen M Arthur - One of the best experts on this subject based on the ideXlab platform.
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great bustard otis tarda habitat selection in relation to Agricultural Use in southern portugal
Wildlife Biology, 2004Co-Authors: Francisco Moreira, Rui Morgado, Stephen M ArthurAbstract:We investigated habitat selection patterns of the great bustard Otis tarda in a dynamic Agricultural landscape in southern Portugal. Combining data from 26 bustard counts with habitat mapping, we Used resource selection functions to characterise habitat selection in two areas with different Agricultural Uses. Selection patterns were compared among areas, seasons (breeding, post-breeding and winter), and flock types (male, female and mixed) during the breeding season. Seasonal differences in selection patterns generally parallelled changes in estimated food availability. Stubbles (i.e. recently harvested fields) and stream margins were preferentially selected by all bustards during the post-breeding period, whereas cereal and fallow fields were selected during winter. During the breeding season, males selected fallow fields more than other habitat types, whereas females selected cereal fields. Habitat selection seemed to be influenced by habitat availability, with birds showing stronger selection for preferred habitats in the areas where they were less available. Great bustards Used different habitat types throughout the Agricultural year, and we recommend that habitat management promotes a rotational crop system that includes cereal and fallow fields.
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great bustard otis tarda habitat selection in relation to Agricultural Use in southern portugal
Wildlife Biology, 2004Co-Authors: Francisco Moreira, Rui Morgado, Stephen M ArthurAbstract:We investigated habitat selection patterns of the great bustard Otis tarda in a dynamic Agricultural landscape in southern Portugal. Combining data from 26 bustard counts with habitat mapping, we Used resource selection functions to characterise habitat selection in two areas with different Agricultural Uses. Selection patterns were compared among areas, seasons (breeding, post-breeding and winter), and flock types (male, female and mixed) during the breeding season. Seasonal differences in selection patterns generally parallelled changes in estimated food availability. Stubbles (i.e. recently harvested fields) and stream margins were preferentially selected by all bustards during the post-breeding period, whereas cereal and fallow fields were selected during winter. During the breeding season, males selected fallow fields more than other habitat types, whereas females selected cereal fields. Habitat selection seemed to be influenced by habitat availability, with birds showing stronger selection for prefe...
L Elango - One of the best experts on this subject based on the ideXlab platform.
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groundwater quality and its suitability for domestic and Agricultural Use in tondiar river basin tamil nadu india
Environmental Monitoring and Assessment, 2012Co-Authors: K Ramesh, L ElangoAbstract:Assessment of suitability of groundwater for domestic and Agricultural purposes was carried out in Tondiar river basin, Tamil Nadu, India. The study area covers an area of 315 km(2) and lies in a semiarid region. Groundwater is the major source for domestic and Agricultural activity in this area. Groundwater samples were collected from 45 wells during pre-monsoon and post-monsoon period in the year 2006. The water samples were analysed for physical and chemical characteristics. Suitability of groundwater for irrigation was evaluated based on salinity hazard, sodium percent, sodium adsorption ratio, residual sodium carbonate, US salinity diagram, Wilcox's diagram, Kelly's ratio and permeability index. Ca-HCO(3), mixed Ca-Mg-Cl and Na-Cl were the dominant groundwater types. High hardness and electrical conductivity in this area makes the groundwater unsuitable for drinking and Agricultural purposes. Concentration of trace elements (Mn, Cu, Zn, Pb and Ni) did not exceed the permissible limit for drinking and Agricultural purposes. Majority of the groundwater samples were unsuitable for domestic and Agricultural purposes except for 31% and 36%, which were suitable for drinking and irrigation purposes, respectively.
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groundwater quality and its suitability for drinking and Agricultural Use in chithar river basin tamil nadu india
Environmental Earth Sciences, 2005Co-Authors: T Subramani, L Elango, S R DamodarasamyAbstract:Hydrochemistry of groundwater in Chithar Basin, Tamil Nadu, India was Used to assess the quality of groundwater for determining its suitability for drinking and Agricultural purposes. Physical and chemical parameters of groundwater such as electrical conductivity, pH, total dissolved solids (TDS), Na+, K+, Ca2+, Mg2+, Cl−, HCO3−, CO32−, SO42−, NO−3, F−, B− and SiO2 were determined. Concentrations of the chemical constituents in groundwater vary spatially and temporarily. Interpretation of analytical data shows that mixed Ca–Mg–Cl, Ca–Cl and Na–Cl are the dominant hydrochemical facies in the study area. Alkali earths (Ca2+, Mg2+) and strong acids (Cl−, SO42−) are slightly dominating over alkalis (Na+, K+) and weak acids (HCO3−, CO32−). The abundance of the major ions is as follows: Na+ ≥ Ca2+ ≥ Mg2+ > K+ = Cl− > HCO3−> SO42− > NO3− > CO32− . Groundwater in the area is generally hard, fresh to brackish, high to very high saline and low alkaline in nature. High total hardness and TDS in a few places identify the unsuitability of groundwater for drinking and irrigation. Such areas require special care to provide adequate drainage and introduce alternative salt tolerance cropping. Fluoride and boron are within the permissible limits for human consumption and crops as per the international standards.
Rafael Rodriguezochoa - One of the best experts on this subject based on the ideXlab platform.
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effects of wetland construction on nutrient som and salt content in semi arid zones degraded by intensive Agricultural Use
Applied Soil Ecology, 2008Co-Authors: David Morenomateos, Francisco A Comin, Cesar Pedrocchi, Rafael RodriguezochoaAbstract:Abstract The aim of this study was to determine whether experimental-created wetlands affect soils by altering the levels of soil organic matter (SOM), inorganic nutrients contributed by fertilization and soil salinity/sodicity. We compared the properties of soils in permanently and intermittently flooded experimental wetlands artificially created in conventionally tilled Agricultural areas 7 years after abandonment. To assess the long-term effects of wetlands, 18 wetlands created spontaneously by flooding with water from irrigated fields were compared to nearby croplands. Experimental-created wetlands did not exhibit a significant increase in SOM, but soil salinity was reduced, and inorganic nutrients were significantly lower than they were in the reduced in regard to reference croplands. In the soils of the observational natural wetlands that formed after irrigation, SOM increased significantly, and the levels of inorganic nutrients and salinity were reduced compared to Agricultural soils. In the Ebro river Basin, 7 years of restoration might not be sufficient time for a significant accumulation of SOM but, after a prolonged period (∼40 years), SOM increased. In experimental-created wetlands, inorganic nutrients were slowly converted into SOM, but a portion of the NO 3 -N was denitrified, and some of the P was adsorbed by soil particles. Guidelines are provided for the creation of wetlands in existing and new Agricultural developments in semi-arid regions.
Francisco Moreira - One of the best experts on this subject based on the ideXlab platform.
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great bustard otis tarda habitat selection in relation to Agricultural Use in southern portugal
Wildlife Biology, 2004Co-Authors: Francisco Moreira, Rui Morgado, Stephen M ArthurAbstract:We investigated habitat selection patterns of the great bustard Otis tarda in a dynamic Agricultural landscape in southern Portugal. Combining data from 26 bustard counts with habitat mapping, we Used resource selection functions to characterise habitat selection in two areas with different Agricultural Uses. Selection patterns were compared among areas, seasons (breeding, post-breeding and winter), and flock types (male, female and mixed) during the breeding season. Seasonal differences in selection patterns generally parallelled changes in estimated food availability. Stubbles (i.e. recently harvested fields) and stream margins were preferentially selected by all bustards during the post-breeding period, whereas cereal and fallow fields were selected during winter. During the breeding season, males selected fallow fields more than other habitat types, whereas females selected cereal fields. Habitat selection seemed to be influenced by habitat availability, with birds showing stronger selection for preferred habitats in the areas where they were less available. Great bustards Used different habitat types throughout the Agricultural year, and we recommend that habitat management promotes a rotational crop system that includes cereal and fallow fields.
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great bustard otis tarda habitat selection in relation to Agricultural Use in southern portugal
Wildlife Biology, 2004Co-Authors: Francisco Moreira, Rui Morgado, Stephen M ArthurAbstract:We investigated habitat selection patterns of the great bustard Otis tarda in a dynamic Agricultural landscape in southern Portugal. Combining data from 26 bustard counts with habitat mapping, we Used resource selection functions to characterise habitat selection in two areas with different Agricultural Uses. Selection patterns were compared among areas, seasons (breeding, post-breeding and winter), and flock types (male, female and mixed) during the breeding season. Seasonal differences in selection patterns generally parallelled changes in estimated food availability. Stubbles (i.e. recently harvested fields) and stream margins were preferentially selected by all bustards during the post-breeding period, whereas cereal and fallow fields were selected during winter. During the breeding season, males selected fallow fields more than other habitat types, whereas females selected cereal fields. Habitat selection seemed to be influenced by habitat availability, with birds showing stronger selection for prefe...
C Balis - One of the best experts on this subject based on the ideXlab platform.
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bio fertilization of olive oil mills liquid wastes the pilot plant in messinia greece
International Biodeterioration & Biodegradation, 1996Co-Authors: I Chatjipavlidis, M Antonakou, D Demou, F Flouri, C BalisAbstract:Abstract A method for the biological processing of olive mills liquid wastes (OMWW) for the preparation of a product suitable for Agricultural Use is described. This method exploits OMWW as a substrate for the cultivation of dinitrogen-fixing microorganisms (Azotobacter vinelandii) capable of transforming the material into an organic liquid of high fertilizing and soil conditioning value. The results which have been obtained from the application of this bio-fertilizer for the culture of olive trees, vines and potatoes was very promising.