Keith W. Jaggard

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T h e PROSPECT leaf optical properties and SAIL canopy reflectance models were coupled and inverted using a set of 96 AVIRIS (Airborne Visible~Infrared Imaging Spectrometer) equivalent spectra gathered in afield experiment on sugar beet plots expressing a large range in leaf area index, chlorophyll concentration, and soil color. In a first attempt, the(More)
By 2050, the world population is likely to be 9.1 billion, the CO(2) concentration 550 ppm, the ozone concentration 60 ppb and the climate warmer by ca 2 degrees C. In these conditions, what contribution can increased crop yield make to feeding the world? CO(2) enrichment is likely to increase yields of most crops by approximately 13 per cent but leave(More)
It is important to understand and evaluate the environmental impacts of all crops if we are to develop more sustainable production systems. Understanding the impact of sugar beet (Beta vulgaris) is particularly important as there are alternative crops that can be used for sugar production and also because there is growing interest in its potential as a(More)
As any reader might expect, the clarity of the contributions varies greatly. Some contributors produced papers which are easy to read and understand, even if English is not their mother tongue others have not even addressed their title, and therefore their papers are placed in inappropriate sections or are not appropriate to this volume at all . The(More)
Sugar beet is spring-sown for sugar production in most sugar beet-growing countries. It is grown as a vegetative crop and it accumulates yield (sugar) from very early in its growth cycle. As long as the sugar beet plants do not flower, the sugar accumulation period is indefinite and yield continues to increase. This paper reviews the success of the sugar(More)
In the UK sugar beet is grown on contrasting soils that vary both in their nutritional status and water-holding capacities. Water shortage and low nitrogen reduce canopy growth and dry matter production, which is compensated in part by an increase in the fraction of assimilates partitioned to storage. Conversely, high nitrogen and ample water encourage(More)
(247 articles) environmental science Articles on similar topics can be found in the following collections Email alerting service here right-hand corner of the article or click Receive free email alerts when new articles cite this article-sign up in the box at the top By 2050, the world population is likely to be 9.1 billion, the CO 2 concentration 550 ppm,(More)
Volume 72 No. 2 Summer 2004 The EU Sugar Regime is under review to decide the future of beet sugar production in Europe. The review will also consider the impact of sugar beet production on the European environment and in anticipation of this, the BBRO commissioned research to evaluate the direct environmental impacts of the activities used to produce a(More)
Precision irrigation requires the mapping of within-field variations of water requirement. Conventional remote sensing techniques provide estimates of water status at only shallow soil depths. The ability of a water sensitive crop, sugar beet, to act as an intermediate sensor providing an integrated measure of water status throughout its rooting depth is(More)
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