Post-harvest sown catch crops – results from two years of organic field trials

Post-harvest sown catch crops should be sown as early as possible in order to obtain maximum biomass and nutrient uptake in the harvested crop, as biomass production decreased by 2-3.5 percent per day, when time of sowing was postponed throughout August. Furthermore, the winter hardy species included in these experiments had a tendency to yield less than the non-winter hardy catch crops. These experiments imply that early sown catch crops may become a biomass supplement for organic biogas production, provided sufficient yields are obtained and costs for harvest, transportation and storage are adequately low

Fed up with Acidification: Trusting the Federal Government to Protect the Tulalip Tribes\u27 Access to Shellfish Beds

Part I of this paper discusses the threat ocean acidification poses to the Tulalip Tribes’ ability to practice and preserve its way of life. Part II examines the laws and legal structures, especially the Clean Water Act, that can simultaneously protect the Tulalip Tribes’ right to harvest shellfish at “usual and accustomed” shellfish beds and the health of Puget Sound’s waters as a whole. Finally, Part III proposes actions that can be taken at the state, tribal, and federal levels. First, the Environmental Protection Agency (EPA) should develop criteria and water quality standards relevant to ocean acidification that can be applied throughout the country. In addition, the State of Washington should apply the current standards to its coastal waters so a workable Total Maximum Daily Load (TMDL) plan can be implemented. Second, the Tulalip Tribes of Washington should be granted full status for purposes of section 303(d) of the Clean Water Act so that the Tribes can establish water quality standards and TMDL plans. Because of the Tulalip’s treaty protected interest in off-reservation shellfish beds, the water quality standards and TMDL plans should be extended to waters affecting those shellfish beds, as well. In addition, the federal government should fully fund the programs established by the Tulalip to protect their rights to shellfish. Finally, the federal government should extend funding to programs administered by the State of Washington that address ocean acidification on a state-wide level

Blandsæd, højere udbytter i vårbyg og efterafgrøder

Årets forsøgsresultater (2012)med nye dyrkningsstrategier tegner lovende i forhold til at kunne opnå højere og mere stabile udbytter i den økologiske planteproduktion

Probabilistic state preparation of a single molecular ion by projection measurement

We show how to prepare a single molecular ion in a specific internal quantum state in a situation where the molecule is trapped and sympathetically cooled by an atomic ion and where its internal degrees of freedom are initially in thermal equilibrium with the surroundings. The scheme is based on conditional creation of correlation between the internal state of the molecule and the translational state of the collective motion of the two ions, followed by a projection measurement of this collective mode by atomic ion shelving techniques. State preparation in a large number of internal states is possible.Comment: 4 pages, 2 figures, 2 table

Periodic orbit analysis of an elastodynamic resonator using shape deformation

We report the first definitive experimental observation of periodic orbits (POs) in the spectral properties of an elastodynamic system. The Fourier transform of the density of flexural modes show peaks that correspond to stable and unstable POs of a clover shaped quartz plate. We change the shape of the plate and find that the peaks corresponding to the POs that hit only the unperturbed sides are unchanged proving the correspondence. However, an exact match to the length of the main POs could be made only after a small rescaling of the experimental results. Statistical analysis of the level dynamics also shows the effect of the stable POs.Comment: submitted to Europhysics Letter