The long-term agronomic performance of organic stockless rotations

This report was presented at the UK Organic Research 2002 Conference. Two long-term experiments were established with the aim of evaluating the agronomic and economic performance of organic stockless rotations. In total, four different rotations were evaluated at two sites in the south (Elm Farm Research Centre) and east (ADAS Terrington) of England. All of the rotations included either a one or two-year red clover green manure crop to provide nitrogen for subsequent crops and it was found that this was sufficient to support three or four years of arable cropping. Over a period of eleven years at EFRC and five years at ADAS Terrington, there was no evidence of a decline in crop yield, although there were significant year-to-year variations. Crop yields were generally equivalent to or greater than average organic yields. Levels of soil available P and K was maintained at both sites at non-limiting levels. Pest and diseases were not problematic, but perennial weeds posed the most significant problem

The Economic Impact of Deafness

The purpose of this paper was to determine the economic impact of deafness over a 40-year work life. Information provided by the U.S. Internal Revenue Service made it possible to estimate the lifetime earnings of 4,398 deaf adults who had a wide variety of educational backgrounds. Data on the U.S. population as a whole (matched on age and education), extracted from U.S. Bureau of the Census publications, were used for purposes of comparison. Results indicate that the economic cost of deafness is great. Over the course of a lifetime deaf people earn between $356,000 and$609,000 less than their comparably educated hearing counterparts. Overall differences between deaf and hearing persons would be increased further by virtue of the fact that hearing people are more likely to receive some college education, and are thus more likely to enjoy attendant higher salaries. As an afterword, some of the non-economic costs of deafness are noted

An Analysis Of The Duties And Responsibilities Of The California Elementary School Vice-Principal

The purpose of this study was to determine California elementary vice principals\u27 perceptions of the actual time allocated to their duties, the time that should be given to their duties, and their level of responsibility for each of their activities

Book Review

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The Effect of Postsecondary Education on the Occupational Attainments of Deaf Adults

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