A new study to evaluate the Illinois Soil N Test (ISNT) calls into question traditional soil fertility recommendations and promises a radical new soil-based approach that will benefit crop yields, the environment, and the bottom line for farmers.
In a forthcoming issue of the Soil Science Society of America Journal, scientists at the University of Illinois at Urbana-Champaign will outline how current nitrogen recommendations are faulty, the soybean credit is invalid, and balanced fertility makes for optimum nitrogen uptake. As well, the article highlights the importance of plant populations and crop residue management for proper usage of nitrogen fertilizers.
"Our work involved 102 on-farm nitrogen-response studies conducted throughout Illinois in six growing seasons from 1990 to 2003. A site-by site evaluation of the proven-yield method showed that current fertilizer recommendations are not only wrong, they are scientifically indefensible," said Richard Mulvaney, a professor of soil fertility.
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DNA molecules that follow specific instructions could offer more precise molecular control of synthetic chemical systems, a discovery that opens the door for engineers to create molecular machines with new and complex behaviors.
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MPQ scientists achieve long storage times for photonic quantum bits which break the lower bound for direct teleportation in a global quantum network.
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Tiny pores at a cell's entryway act as miniature bouncers, letting in some electrically charged atoms--ions--but blocking others. Operating as exquisitely sensitive filters, these "ion channels" play a critical role in biological functions such as muscle contraction and the firing of brain cells.
To rapidly transport the right ions through the cell membrane, the tiny channels rely on a complex interplay between the ions and surrounding molecules,...
The miniaturization of the current technology of storage media is hindered by fundamental limits of quantum mechanics. A new approach consists in using so-called spin-crossover molecules as the smallest possible storage unit. Similar to normal hard drives, these special molecules can save information via their magnetic state. A research team from Kiel University has now managed to successfully place a new class of spin-crossover molecules onto a surface and to improve the molecule’s storage capacity. The storage density of conventional hard drives could therefore theoretically be increased by more than one hundred fold. The study has been published in the scientific journal Nano Letters.
Over the past few years, the building blocks of storage media have gotten ever smaller. But further miniaturization of the current technology is hindered by...
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