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'nitrogen' 
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K. Ponder ; J. Pritchard ; R. Harrington ; J. Bale | 2000Effects of nitrogen deficiency in hydroponically grown barley seedlings (Hordeum vulgare L.) on the development and reproduction of the aphid Rhopalosiphum padi (L.) (Hemiptera: Aphididae) were investigated. Plant growth was significantly reduce[...]
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article/chapitre/communication
W. Jeschke ; P. Baumel ; N. Rath ; F. Czygan ; P. Proksch | 1994A recently developed empirically based modelling technique was used to quantify uptake, flow and utilization of C and N in Lupinus albus L., uninfected and parasitized by Cuscuta reflexa Roxb. plants over a 12 d period during flowering and early[...]
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W. Jeschke ; N. Rath ; P. Baumel ; F. Czygan ; P. Proksch | 1994Nodulated Lupinus albus L. was grown on quartz sand in the greenhouse and supplied with a N-free culture solution. Half the plants were infected with Cuscuta reflexa Roxb. at 33 DAS. An empirically based modelling technique was developed to quan[...]
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O. Bonato ; F. Schulthess ; J. Baumgartner | 1999A population model for maize growth and development driven by temperature, solar radiation, soil water and soil nitrogen is presented. A time-varying distributed delay model is used to describe the dynamics of the attributes number, biomass and [...]
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J. Hibberd ; W. Quick ; M. Press ; J. Scholes ; W. Jeschke | 1999Orobanche species are holoparasites which are very efficient sinks for host-derived solutes. Here, we report the use of direct measurements of xylem sap solute concentrations and water fluxes, together with a modelling procedure to calculate ele[...]
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Francis Eugene Clark, Auteur ; T. Rosswall, Auteur | Stockholm [SWE] : Swedish Natural Science Research Council | Ecological bulletins, ISSN 0346-6868 | 1981
article/chapitre/communication
article/chapitre/communication
S. Duffield ; R. Bryson ; J. Young ; R. Sylvesterbradley ; R. Scott | 1997The effect of nitrogen fertiliser on populations of the cereal aphids Sitobion avenae and Metopolophium dirhodum on winter wheat was investigated in a three year field experiment. Naturally occurring aphid populations were monitored on three nit[...]
