نتایج جستجو برای: during different historic periods
تعداد نتایج: 3229969 فیلتر نتایج به سال:
According to the latest EU regulations it is necessary cut down consumption of chemically based pesticides. Several research programmes are focussed on study secondary metabolites plants, which have antimicrobial or antifungal activity against microbial phytopathogens. Other reasons for using natural biocides growth resistance phytopathogens several pesticides; broaden attacks significant agric...
The link between unemployment and pension accumulations is conceptually straightforward; periods of unemployment lead to lower pension contributions, and thus to lower accumulations. However, impacts on accumulation may differ as a result of the timing and frequency of unemployment spells. We hypothesize that unemployment is more likely during periods in which the equities market experiences gr...
Socio-hydrology is the science of human influence on hydrology and the influence of the water cycle on human social systems. This newly emerging discipline inherently involves a historic perspective, often focusing on timescales of several centuries. While data on human history is typically available for this time frame, gathering information on the hydrological situation during such a period c...
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