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Displaying 596 - 600 of 1605Collective management on communal grazing lands: Its impact on vegetation attributes and soil erosion in the upper Blue Nile basin, northwestern Ethiopia
Collective action, on communal grazing land, has evolved in the highlands of northwestern Ethiopia to mitigate the problems of feed shortage and land degradation due to overgrazing. The exercise is liked by farmers for improving the availability of natural pasture during the long dry season when other feed sources get depleted. However, large portions of the communal grazing lands are still managed under free grazing throughout the year.
Forecasting crop yield using remotely sensed vegetation indices and crop phenology metrics
We used data from NASA's Moderate Resolution Imaging Spectroradiometer (MODIS) in association with county-level data from the United States Department of Agriculture (USDA) to develop empirical models predicting maize and soybean yield in the Central United States. As part of our analysis we also tested the ability of MODIS to capture inter-annual variability in yields. Our results show that the MODIS two-band Enhanced Vegetation Index (EVI2) provides a better basis for predicting maize yields relative to the widely used Normalized Difference Vegetation Index (NDVI).
Trade-offs between land use intensity and avian biodiversity in the dry Chaco of Argentina: A tale of two gradients
Studies to assess the relationship between agriculture production and biodiversity conservation usually focus on one gradient ranging from a natural reference land cover type (typically forest) to an intensive productive land use. However, many semi-arid ecoregions such as the dry Chaco are characterized by a mosaic of different land covers, including natural grasslands and woody vegetation with different degrees of transformation, frequently aimed at meat production.
effects of the Common Agricultural Policy on exit strategies and land re-allocation
This paper investigates how farm-households would dispose of farms following a decision by the farm-household to exit from farming, and in particular when a decision is made to sell the land The paper builds on data from a survey of stated intentions carried out in 9 EU countries at the beginning of 2009, using a probit Heckman model, where the model is applied to explain stated intentions to sell land in the case of farm-households that have decided to exit from farming activities, under two extreme Common Agricultural Policy (CAP) scenarios.
Afforestation and reforestation projects in South and South-East Asia under the Clean Development Mechanism: Trends and development opportunities
This paper contributes to identification of key trends, opportunities and constraints for development of afforestation/reforestation projects (AR) under the Clean Development Mechanism (CDM). It reports on analysis of survey results particularly addressing CDM-AR projects in South and South-East Asia (SSEA), and on knowledge obtained from both (i) experts in SSEA countries and (ii) developers, investors and consultants in the Annex I countries. Despite a wide variety of opinions, respondents from both groups expressed a number of similarities in their vision.