Influence of Extreme Displays of Climatic Changes on Efficiency of Agricultural Crops

Repeatability and dynamics of probability of various type of droughts, and also estimation of their intensity on hydrothermal factor for the 120-year-old period (1891–2010гг is shown.). The agrometeorological characteristic of the most severe droughts is given. Decrease in productivity of grain crops and total gathering of grain in the Saratov area in years with various types of droughts is resulted

The Late Cretaceous Deposits of Potassium Soils at the Gremyachinsk Field

The authors consider the compound of the late cretaceous deposits opened up in the bore hole number 13, 62 at the Gremyachinsk field of the potassium soils in the Volgograd region. According to the sediment basins evolution from the epicontinental basins (cenoman, turon-cognacian) to the subpelagic basins (cenonian) the lithotipe which form in the late cretaceous level the regular repeated layers of the terrigenous, carbonate, argillaceous-siliceous deposits are characterized