Replant diseases of apple in the Netherlands

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Cosmological parameters from SDSS and WMAP

We measure cosmological parameters using the three-dimensional power spectrum P(k) from over 200,000 galaxies in the Sloan Digital Sky Survey (SDSS) in combination with WMAP and other data. Our results are consistent with a ``vanilla'' flat adiabatic Lambda-CDM model without tilt (n=1), running tilt, tensor modes or massive neutrinos. Adding SDSS information more than halves the WMAP-only error bars on some parameters, tightening 1 sigma constraints on the Hubble parameter from h~0.74+0.18-0.07 to h~0.70+0.04-0.03, on the matter density from Omega_m~0.25+/-0.10 to Omega_m~0.30+/-0.04 (1 sigma) and on neutrino masses from <11 eV to <0.6 eV (95%). SDSS helps even more when dropping prior assumptions about curvature, neutrinos, tensor modes and the equation of state. Our results are in substantial agreement with the joint analysis of WMAP and the 2dF Galaxy Redshift Survey, which is an impressive consistency check with independent redshift survey data and analysis techniques. In this paper, we place particular emphasis on clarifying the physical origin of the constraints, i.e., what we do and do not know when using different data sets and prior assumptions. For instance, dropping the assumption that space is perfectly flat, the WMAP-only constraint on the measured age of the Universe tightens from t0~16.3+2.3-1.8 Gyr to t0~14.1+1.0-0.9 Gyr by adding SDSS and SN Ia data. Including tensors, running tilt, neutrino mass and equation of state in the list of free parameters, many constraints are still quite weak, but future cosmological measurements from SDSS and other sources should allow these to be substantially tightened.Comment: Minor revisions to match accepted PRD version. SDSS data and ppt figures available at http://www.hep.upenn.edu/~max/sdsspars.htm

In memoriam Dr. Oostenbrink

Am 4. Januar 1979 verstarb MICHIEL OOSTENBRINK nach langer Krankheit in seinem Heim in Wageningen im Alter von 57 Jahren. Er war seit 1957 Direktor des Departments für Nematologie und Dozent an der Landwirtschaftlichen Universität Wageningen. An dieser Universität absolvierte Dr. OOSTENBRINK auch sein Studium. Im Jahre 1950 promovierte er mit einer beispielhaften Untersuchung über den Kartoffelnematoden. Seine Ergebnisse und Schlußfolgerungen führten zu gesetzlichen Bestimmungen über die Fruchtfolge im Hinblick auf diesen gefährlichen Schädling in Kartoffelkulturen

Proefbedrijf Nagele: goede start van de Ontwikkeling Bedrijfs-Systemen (OBS)

Reportage over de stand van zaken bij het Project Ontwikkeling Bedrijfssytemen (OBS, de voormalige Drie Organische Stofbedrijven te Nagele) waar bedrijfsvergelijkingen (van economische en oecologische aspecten) worden uitgevoerd van een gangbaar akkerbouwbedrijf, een biologisch dynamisch landbouwbedrijf en een "geintegreerd" bedrijf waar elementen van beide landbouwmethoden gecombineerd worde