Contour cultivation, the establishment of contour ridges and contour hedges, the best suited way of tilling, are some of the great number of proven techniques which could be employed simultaneously for soil conservation and soil improvement. - (L'A.).
Agropedology ; Brittany ; Caesium-137 ; France ; Geochemistry ; Hedge ; Ille-et-Vilaine ; Model ; Soil erosion ; Space time
In this study, soil redistribution patterns, generated by both water and tillage erosion, were estimated in the vicinity of hedges in an agricultural landscape. Two complementary methods were employed to estimate soil redistribution from 1960
to 2010 : 137Cs conversion models and a spatially distributed soil erosion model (LandSoil model). Both methods determined that hedges affected soil redistribution patterns, which led to soil deposition or limited soil erosion uphill from hedges, even
though soil erosion rates were consistently higher than soil deposition rates. The impact of tillage on soil redistribution in the vicinity of hedges was found to be higher than that of water processes because 87% of net soil redistribution was linked
Nineteenth-century reformers who weaned geography teaching in the USA away from rote methods included R. Davidson, N. Hedges, W. Woodbridge and A. Guyot. But, in so doing, they were also uncritical in their acceptance of environmental determinism
D. D. Rudnev kak geograf i obscestvennyj dejatel'(1879-1932). (D. D. Rudnev, géographe et homme public 1879-1932)
Arctique ; Cartographie ; Géographie des régions polaires ; Histoire de la géographie ; Pecora région ; Rudnev (D. D.), 1879-1932 ; URSS d'Europe
Géographe et cartographe remarquable des 30 premières années de ce siècle, D. D. Rudnev est surtout connu pour ses recherches sur le terrain dans le Grand Nord de la Russie d'Europe. Il a dressé des cartes des régions polaires, et surtout du Nord du
Heranzas ou la creation d une ecole de cirque pour, avec et par les enfants et les jeunes de Cali, Colombie : une histoire d heritages, d inventions et d errances