Comparing conventional and improved organic vegetable rotations, yields and nitrogen husbandry [PDF]
, 2010 During 2005 to 2009 three approaches to organic vegetable rotations were compared to a conventional rotation in an interdisciplinary project. The organic rotations differed in their reliance on animal manure vs.
Kristensen, Hanne L. +1 more
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Estimating Production Risk and Inefficiency Simultaneously: An Application to Cotton Cropping Systems [PDF]
By using a stochastic frontier framework, the mutual effect of input use on production risk and inefficiency is investigated. Disentangling this mutual effect proves important for empirical reasons, at least when applied to west Tennessee cotton systems ...
Frechette, Darren L. +2 more
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Field emissions of N2O during biomass production may affect the sustainability of agro-biofuels [PDF]
, 2011 Field emissions of N2O during cultivation of bioenergy crops may counterbalance a considerable part of the avoided fossil CO2 emissions that are achieved by fossil fuel ...
Ambus, Per +7 more
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Development of disease control strategies for organically grown field vegetables (DOVE) (OF0168) [PDF]
, 2002 This is the final report of Defra project OF0168 (DOVE). The attached main report starts with a more detailed and comprehensive Executive Summary, from which this text has been extracted.
Gladders, Dr Peter
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Ratio of natural isotopes of nitrogen. I. Primary results: soils of Dombes [Translation from: Revue d'Ecologie et de Biologie du Sol 14, 279-287, 1977] [PDF]
, 1980 Utilization of the heavy isotope of nitrogen as a tracer has found numerous applications in soil biology. It allows better definition of different stages of the nitrogen cycle, in particular the immobilization-mineralization cycle.
Chalamet, A. +2 more
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Improving the Availability of Organic Forage Seed in Wales [PDF]
, 2004 The EU regulation requiring organic farmers to use 100% organic herbage seed is looming closer. Currently they are ‘enjoying’ a derogation from this because suitable seed is not available. For 2004 seeds mixtures had to contain at least 50% organic seed.
Marshall, Athole, McCalman, Heather
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Economic Potential of Substituting Legumes for Synthetic Nitrogen in Warm Season Perennial Grasses used for Stocker Cattle Grazing [PDF]
Stocker cattle grazing warm season perennial grasses is an important economic activity in the southern Great Plains. Substantial increases in the price of nitrogen fertilizer is negatively affecting forage producers’ profitability.
Biermacher, Jon T. +8 more
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Samuel Vetch, Colonial Enterpriser
The William and Mary Quarterly, 1960 Bruce T. McCully, G. M. Waller
openaire +3 more sources
Dynamic Economic Analysis of Perennial Energy Crops - EffectS of The CAP Reform on Biomass Supply in Greece [PDF]
Energy from the biomass of perennial crops can offset emissions of greenhouse gases from fossil fuel combustion and increase energy self sufficiency.
Uwe A. Schneider, Vassilis Lychnaras
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