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The EU 'Nitrates Directive' (Directive 91/676/EEC) and the WFD (Water Framework Directive 2000/60/EEC) introduced a series of measures designed to red...
Read moreThe duration of the flowering period and the fraction of open flowers over time were defined as functions of growing degree-days for 5 almond cultivar...
Read moreEnergy production from wind power is increasing rapidly in Europe to help combat the threats from global warming. For example, the European Commission...
Read moreThe nature of the competition which occurred in a mixture of Norwegian and Portuguese populations was studied in controlled environmental conditions. ...
Read moreThe vegetation types in 1-m2 permanent quadrats were determined annually in 1975-82 on low and moderate productivity sites of improved or unimproved F...
Read moreGrassland plots in the Serengeti National Park were burnt at the beginning of the 1986 dry season during the period of max. fire frequency. The availa...
Read moreThe performance of Phragmites australis growing on plots in an experimental field in the Netherlands is described in terms of leaf area and biomass of...
Read moreThe populations of Operophtera brumata (L.) on 8 cider apple trees of 4 cultivars were monitored from October 1972 until May 1975 in Western England. ...
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