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Displaying 1431 - 1435 of 1605Changes in CO₂ emissions after crop conversion from continuous maize to alfalfa
Mitigation strategies for the reduction of carbon dioxide emissions are the central focus of the Kyoto Protocol and international scientific efforts. Agriculture plays a substantial role in the balance of the most significant greenhouse gases (CO₂, N₂O, CH₄), mostly attributed to management practices. In this study, we present data on the effects of a conversion from a cropland (Zea mays L.) to N₂-fixing grassland (Medicago sativa L.) on C cycle in an agricultural area of Northern Italy.
yield gap of global grain production: A spatial analysis
Global grain production has increased dramatically during the past 50years, mainly as a consequence of intensified land management and introduction of new technologies. For the future, a strong increase in grain demand is expected, which may be fulfilled by further agricultural intensification rather than expansion of agricultural area. Little is known, however, about the global potential for intensification and its constraints.
Accuracy and cost of models predicting bird distribution in agricultural grasslands
Numerous agro-environmental indicators have been developed to assess the impact of farming systems on biodiversity. They can be combined into logistic models for predicting the presence of species of ecological interest. In general, several models are available for a given species and their practical value depends on their accuracy and the cost of measurement of their input variables.
changing profile of water traders in the Goulburn-Murray Irrigation District, Australia
This paper examines the changing profile of water traders (both allocation and entitlement traders) in the Goulburn-Murray Irrigation District in Australia, and examines the efficiency of the water allocation and entitlement markets from 1998-99 to 2003-06. The results suggest that the profile of traders in the early and mature stages of the water allocation market differ greatly. In addition, the profile of allocation traders is significantly dissimilar from that of water entitlement traders at all stages of water market development.
Effect of land management and soil texture on seasonal variations in soil microbial biomass in dry tropical agroecosystems in Tanzania
Soil microbes are an essential component of most terrestrial ecosystems; as decomposers they are responsible for regulating nutrient dynamics, and they also serve as a highly labile nutrient pool. Here, we evaluated seasonal variations in microbial biomass carbon (MBC) and nitrogen (MBN) as well as microbial activity (as qCO₂) for 16 months with respect to several factors relating to soil moisture and nutrients under different land management practices (plant residue application, fertilizer application) in both clayey (38% clay) and sandy (4% clay) croplands in Tanzania.