منابع مشابه
Sulfur Fertilization of Alfalfa in the Mountain Valleys of Southern Idaho1/
Areas of S deficiency are still being identified in the Pacific Northwest even though S has been applied to some soils in this region for at least 50 years. Recent studies dealing with the S fertilization of legumes for the Northwest have been conducted by Pumphrey and Moore (1965a, 1965b) in northeastern Oregon; Smith, et al., (1968) in western Montana; Dawson (1969) on pasture legumes in west...
متن کاملUsing Soil and Water Conservation Contests for Extension: Experiences from the Bolivian Mountain Valleys
Soil and water conservation (SWC) contests among farmer groups were organized in five rural villages in the Bolivian mountain valleys. The contests were aimed at quickly achieving widespread sustainable results. This article analyzes the effectiveness of these contests as an extension tool. Mixed results were obtained. In three villages, participation rates in the SWC activities introduced in t...
متن کاملLifting of Ambient Air by Density Currents in Sheared Environments
Two aspects of vorticity associated with cold pools are addressed. First, tilting of horizontal vortex tubes by the updraft at a gust front has been proposed as a means of getting near-ground rotation and hence a tornado. Theory and a numerical simulation are used to show that this mechanism will not work because warm air parcels approaching the gust front decelerate in strong adverse pressure ...
متن کاملquaternary evolutions of mountain valleys by using contour lines case study (sabalan mountains)
condition of contour lines in topographic maps, explains more geomorphologic issues such as effective processes in the land forms found in nature. change in the curvature of the transverse profile of a valley in mountainous areas, the peak of the mountain range, also reflect the geomorphologic features and expresses the tectonic events and climate changes occurring in the region. these changes ...
متن کاملModelling photochemistry in alpine valleys
Road traffic is a serious problem in the Chamonix Valley, France: traffic, noise and above all air pollution worry the inhabitants. The big fire in the Mont-Blanc tunnel made it possible, in the framework of the POVA project (POllution in Alpine Valleys), to undertake measurement campaigns with and without heavy-vehicle traffic through the Chamonix and Maurienne valleys, towards Italy (before a...
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ژورنال
عنوان ژورنال: Science
سال: 1910
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.31.798.577