GEOCHEMISTRY: To Till or Not to Till

Quaternary Geology and Till Geochemistry of the Redstone and Loomis

This pa per sum ma rizes Qua ter nary ge ol ogy map ping and till geo chem is try stud ies con ducted as part of the re gional min eral po ten tial as sess ment of the Redstone and Loomis Lake map ar eas (NTS 093B/04, 05; Fig ure 1). This study was ini ti ated to com ple ment an on go ing re gional bed rock map ping pro gram and min eral po ten tial as sess ment be ing con ducted in NTS 093C/01...

It's not over till it's over.

Case studies are presented of three HIV-infected patients, one heterosexual, one bisexual, and one homosexual, who continued to engage in unsafe sex. Western countries have seen an increase in unsafe sex practices since the early 1990s, raising the specter of a new wave of HIV infections. Increasing rates of sexually transmitted diseases are already being reported in case studies and by the Cen...

The ‘Single Till’ and the ‘Dual Till’ Approach to the Price Regulation of Airports

In October 2000 the Civil Aviation Authority (CAA) published a Position Paper on the airport quinquennial reviews 1. The paper confirmed the CAA's intention to " undertake a fundamental review of its approach to the economic regulation of designated airports " and reaffirmed its commitment to the criterion of economic efficiency in assessing trade-offs between its statutory objectives under s.3...

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