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My main research focus is the field storage of sugar beets, but incorporates harvest questions. Topics of current interest include: - thermodynamics and fluid dynamics of field stores - beet mechanical properties - pressures in harvest and post-harvest storage and handling - crop physiology and quality - modelling of harvest and post-harvest systems
The rate of airflow through a sugar beet clamp is central in the thermodynamic processes that occur during storage. It determines the rate at which ambient air and the air inside the clamp exchange through advection, and the rates at which heat and moisture transfer between the beets and the air. Computational Fluid Dynamics (CFD) is a method comm...
Rates of harvest damage in various vegetable crops has been linked to soil water content at harvest and the resulting cell turgor. Casual observation in sugar beet suggests that rates of surface cracking at harvest are similarly linked to soil water content. The rates of damage during harvest and handling of sugar beet has also been linked to their...
Long term storage of sugar beets in clamps can be challenging due to high accumulation of degree days, frost or excessive moisture. This may cause an increased growth of molds, spread of rots, and rates of respiration , which in turn leads to high sugar losses during storage. With support from the agricultural European Innovation Partnership (EIP-A...
Methodology for analysing textural properties of sugar beet roots in the laboratory has previously been established. It has been shown to be reliable and of value in exploring relationships between textural properties, damage rates, and storability of varieties. In this paper, a methodology for the assessment of textural properties in-field, prior...
There is some evidence that sugar beet root tissue strength affects damage susceptibility and storage losses. This study aimed at analyzing the effect of N application and of irrigation on tissue strength of sugar beet varieties, on root composition, and on root tip breakage and storage losses. For this purpose, field trials in six replicates with...
What is the role of temperature in the long-term storage of sugar beets, including on the sugar loss mechanisms of respiration and rot. Rates of mechanical damage are also considered.
OBJECTIVES 1. Investigate the size of impact stresses that sugar beets may be exposed to during harvest and transport: Force, contact area, & pressure; Differences between beet types; Differences between beet size 2. Further develop assessment method, inc.converting dynamic to static
CONCLUSIONS • The correspondence between the handheld and the laboratory penetrometers was high • The magnitude of values from the handheld penetrometer were most similar to Puncture resistance • The rank order of pressures recorded in season with the handheld penetrometer was stable over time
In the absence of financial information on Australian mohair enterprises we aimed to determine the gross margins (per dry sheep equivalent, DSE) and their relationships with farm inputs, productivity and mohair quality in Australian mohair enterprises. Using established Victorian Farm and Sheep Monitor Project protocols we collected data for the fi...
This research and education program (https://www.slu.se/en/education/programmes-courses/doctoral-studies/externally-employed-doctoral-students/) was installed as part of the Swedish National Food Strategy (https://www.government.se/information-material/2017/04/a-national-food-strategy-for-sweden--more-jobs-and-sustainable-growth-throughout-the-country.-short-version-of-government-bill-201617104/). Strategic aims are production of sustainable and healthy food with low input of fossil raw materials. Use of antibiotics and herbicides as well as food waste should be minimised. At the same time, Swedish industry should be competitive on the global market. Highly qualified people are required to solve these challenges. Industrial doctoral students with roots in both corporate and academic world will become the future leaders in food industry.
A thermal camera mounted on a drone will be used to complement ground sourced readings in two projects: using plant volatiles to attract natural enemies of aphids common in sugar beets, and modelling temperature in sugar beet clamps. The project runs over the 2020 season.
To investigate management options that allow the clamp (field-store) temperature to be maintained within the ideal range, given the Swedish climate.