the phytoplankton structure and dynamics were analysed in relation to abiotic variables inpaso de las piedras reservoir, argentina. phytoplankton driving forces were explored using a functionalapproach. a total of 15 functional groups were identified among which d, p, h1, f, j and c were the mostimportant. a canonical variate analysis indicated that the categorization of the species in function...

abstract plants growth and development and physiological activities occur in a certain air temperature range. spit of this fact that zero temperature named as a freezing temperature, in agriculture meteorology, freezing happen in lower temperature which is different for plants that lead to their tissues damage. early autumn freezing cause damage to harvesting of cotton and sugar beet and affect...

Introduction: For this investigation we have used neutron spectroscopy data gathered with HEND/GRS instrument onboard Mars Odyssey. Starting from 2002 this mission passed through primary and several extended phases accumulating enormous data volume. During this mission one has been proved that orbital mapping of neutron flux from martian surface (instruments HEND, NS and GRS) is powerful method...

abstract the goal of this experiment was to save apricot flowers from late spring frost damage. this experiment was conducted during 2007-2008 to examine the effect of application of different concentrations of gibberellic acid in two forms pure (ga3) and impure (berelex) at (0, 50, 100, 200, 300 mgl-1) at 23 august and 23 september to delay flowering in apricot asgarabad cultivar. a factorial ...

The Balkan peninsula is a transitional zone, in terms of bioclimatic conditions, with an extended and dynamic agricultural sector. Its potential peril due to climate change socioeconomic factors. To assess evaluate the agrometeorological conditions related trends which affect widely cultivated wheat maize, big dataset high spatiotemporal analysis was utilized. thermal indices Growing Degree Day...

In this study, the influence of the East Atlantic/Western Russia teleconnection pattern on the hydroclimatology of Europe, from mid-winter to late spring, is investigated. The influence of EAWR on the variability of precipitation (PP), temperature (TT) and standardized precipitation-evapotranspiration index (SPEI) is investigated on the base of correlation and stability maps. It is shown that E...

Highlight: Two tallgrass prairie areas burned annually for 20 (grazed) nnd 48 (un. grazed) years ar different fimeS showed differences in soil chemical and physical properties. Winter, early-spring, and mid-spring burned ungrared plots were generally higher in soil pH, organic ma~fer, and K than late-spring burned or unburned plots. Late-Jpring and winter burning lowered soil N on ungrazed and ...