this paper considers the potential problems that may militate against the adoption of organic poultry production in nigeria. factors identified include: higher risk of diseases like coccidiosis and newcastle disease, disease prevention and control / herd health management, disease containment in times of outbreak, land acquisition (land tenure system), market economies / cost-benefit ratio, pas...

in this study, several artificial neural networks (anns) were developed to estimate seed and grain corn yields in parsabad moghan, iran. the data was collected by a face-to-face interview method from 144 corn farms during 2011. the energy ratios for seed and grain corns were calculated as 0.89 and 2.65, respectively. several multilayer perceptron anns with six neurons in the input layer and one...

World meat consumption has increased considerably during recent decades at the same time as questions about the sustainability of livestock systems. The aim of the paper is to investigate whether organic meat production can be more sustainable than conventional meat production. Organic meat production is supposed to use ecological resources, such as natural grasslands and by-products with low a...

Pon Nya Mon and David W. Holland Corresponding Author Pon Nya Mon 1650 N.E. Valley Road. H1 Pullman, WA 99163 Tel/fax: 509-338-4982 E-mail: [email protected] This paper provides an Input-Output (I/O) based economic impact analysis for organic apple production in Washington State. The intent is to compare the economic “ripple” effect of organic production with conventional production. The analy...

qualitative and quantitative analyses of phyto- and zooplankton, and growth performance of cyprinus carpio linnaeus were done in earthen vats receiving compost, diammonium phosphate and vermicompost as direct application fertilizer were conducted. significant differences were observed in the diversity and abundance of plankton in response to fertilization. the highest production of fish was obt...

There was an active cycling of C and N in the sediments underlying a Halodule beaudetti meadow. Intensive C cycling was inferred from high rates of O2 uptake (131 mm01 m-' d-l), CO2 production (199 mm01 m-2 d-l) and sulfate reduction (34 mm01 m-2 d-'). Subsurface input of organic matter was indicated by the high rates of sulfate reduction and the presence of a short-lived organic pool (5 to 10 ...

sustainable development of the production in every region requires consideration of energy flow in the production system, moreover, investigating the production system inputs from environmental management point of view is of high importance. in this study energy use and greenhouse gas emissions is investigated. data were collected through interviews with 75 tea farmers and comparing the results...