منابع مشابه
Antimony bioavailability: knowledge and research perspectives for sustainable agricultures.
The increasing interest in urban agriculture highlights the crucial question of crop quality. The main objectives for environmental sustainability are a decrease in chemical inputs, a reduction in the level of pollutants, and an improvement in the soil's biological activity. Among inorganic pollutants emitted by vehicle traffic and some industrial processes in urban areas, antimony (Sb) is obse...
متن کاملCoexistence or contradiction? GM crops versus alternative agricultures in Europe
Agricultural biotechnology (agbiotech) has intersected with a wider debate about ‘sustainable agriculture’, especially in Europe. Agbiotech was initially promoted as an alternative which would avoid or remedy past problems of intensive agriculture, but such claims were soon challenged. Agbiotech has extended the dominant agri-industrial paradigm, while critics have counterposed alternatives cor...
متن کاملPolicy frameworks for increasing soil fertility in Africa: debating the alternatives A Future Agricultures Consortium debate
Everyone is agreed that one of the central components of achieving an „African Green Revolution‟ is to tackle the widespread soil fertility constraints in African agriculture. To this end, AGRA – the Alliance for a Green Revolution in Africa – has launched a major new „Soil Health‟ programme aimed at 4.1 million farmers across Africa, with the Bill and Melinda Gates Foundation committing $198 m...
متن کاملBiodiversity of Micromycetes Isolated from Soils of Different Agricultures in Kazakhstan and Their Plant Growth Promoting Potential
The comparative analysis of different taxonomic groups of microorganisms isolated from dark chernozem soils under different agricultures (alfalfa, melilot, sainfoin, soybean, rapeseed) at Almaty region of Kazakhstan was conducted. It was shown that the greatest number of micromycetes was typical to the soil planted with alfalfa and canola. Species diversity of micromycetes markedly decreases as...
متن کاملCompression d'images par SVD et sur-approximation des composantes de chrominance
RÉSUMÉ. Dans cet article, nous présentons un nouveau schéma de compression d’image en couleurs qui effectue une approximation de la matrice des valeurs singulières. L’image doit être convertie dans l’espace luminance / chrominance avant d’être traitée comme dans le cas de la norme JPEG 4 : 2 : 0. Notre algorithme repose sur un sous-échantillonnage de la chrominance, puis une sur-approximation d...
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ژورنال
عنوان ژورنال: VertigO
سال: 2015
ISSN: 1492-8442
DOI: 10.4000/vertigo.15852