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Optimizing Strip-Till and No-Till Systems for Corn

Recent developments in biofuel demand and the rapid adoption of modern transgenic hybrids are changing production systems towards more corn after corn, more intensive tillage, higher plant populations, and ever higher crop residue levels at harvest. Meeting society’s needs for food, feed, and fuel from grain corn, and in the future from corn stover, requires continued refinement of tillage syst...

Macropore flow estimations under no-till and till systems

Till Axel och Knut

Norlund, F. 2018. Psychological distress in coronary heart disease. Risk indicators, treatment and cardiovascular prognosis. Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Medicine 1412. 75 pp. Uppsala: Acta Universitatis Upsaliensis. ISBN 978-91-513-0192-1. The aims of this thesis were to: (1) explore factors associated with emotional distress; (2) investigate psy...

Geochemical Partitioning in Till

and Vagners (1971, 1972) expressed this phenomenon elegantly by introducing the concept of "terminal mode" for the optimum grain size to which a mineral can be reduced, given the force and energy typically available in the glacial environment. Thus, hard, uncleaved or poorly cleaved minerals such as quartz, fcldspar, garnet, pyrite and magnetite dominate either the medium or the fine sand fract...

On the rheology of till

The deformation of subglacial till is instrumental in causing certain glacier surges, the motion of rapid ice streams in ice sheets, and ice sheet surges which are associated with Heinrich events, and consequent rapid climatic shifts, during the last ice age. It may also be the means whereby drumlins are formed, and these in turn may act as a brake on large scale ice flow. It is therefore impor...