منابع مشابه
Evolutionary ecology of mycorrhizal functional diversity in agricultural systems
The root systems of most agronomic crops are colonized by diverse assemblages of arbuscular mycorrhizal fungi (AMF), varying in the functional benefits (e.g. nutrient transfer, pathogen protection, water uptake) provided to hosts. Little is known about the evolutionary processes that shape the composition of these fungal assemblages, nor is it known whether more diverse assemblages are benefici...
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Since the late 9 0s, point sources of water-quality impairment have been reduced due to their ease of identification and the passage of the Clean Water Act in 97 . However, water-quality problems remain, and as further point-source control becomes less costeffective, attention is being directed towards the role of agricultural nonpoint sources in water-quality degradation. In a 99 US Environmen...
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Abstract Purpose - The aim of this paper is to describe the population ecology theory through fractal thinking, an emergent human operating system that is creative, adaptive, healthy, and evolutionary; furthermore, a parallel is drawn between the population ecology model and the fractal structure. Top-down hierarchies are typically characterized by command and control systems of the authority t...
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An undeniable and expensive consequence of agricultural practices is the adaptation of weeds to agricultural systems. Weeds are responsible for significant crop yield losses and for financial losses in agricultural production – in the order of 10% per year worldwide (Oerke, 2006). To address this critical problem, the discipline of weed science has expanded over the past 50 yr into an amalgam o...
متن کامل"What we need is a crop ecologist": ecology and agricultural science in Progressive-era America.
Though they are often seen as foils for each other, ecology and agricultural science co-evolved. With shared roots in late nineteenth-century botany, ecologists and agronomists fostered important connections during the Progressive era that have been largely overlooked despite a number of finely nuanced studies of ecology's origins. But if 'applied ecology' once effectively meant agriculture, ov...
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ژورنال
عنوان ژورنال: Bulletin of the Entomological Society of America
سال: 1980
ISSN: 0013-8754
DOI: 10.1093/besa/26.1.33a