1,747 research outputs found
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
Reuse of polyethylene fibres from discarded fishing nets as reinforcement in gypsym-based materials
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
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