Study on micro-water-collecting technique in dryland field of spring maize
This paper analyses the effect of water storage and soil moisture conservation by means of micro-water-collecting technique in the dryland field of spring maize. This technique not only has the function of regulating and adjusting the amount
and distribution of field evapotranspiration, but also can raise the water use efficiency, which results in an obvious effect of increasing crop yield, especially in the dry years.
Colluvial processes and soil variation at field boundaries in County Down
To ascertain if the formation and survival of colluvium deposits, step-like in cross section, can affect soil property variation, a study was carried out in 3 fields at 3 different sites in mid-County Down. Results show that downslope changes
New dates on late Pleistocene dacitic tephra from the Mount Edgecumbe volcanic field, southeastern Alaska
New radiocarbon dates on charcoal incorporated in proximal airfall deposits indicate the largest late Pleistocene eruption from the Mt. Edgecumbe volcanic field in Southeast Alaska occurred ca. 11,250 yr B.P. The more precise dating of the principal
The AA. applied several quantitative pedologic methods to soils on dune crests in he eastern part of the Saginaw dune field. The primary goal of the study was to determine whether the dunes in this part of the Saginaw dune field stabilized
concurrently or randomly in time and space. Second, they compared the data from this part of the Saginaw dune field with that from Arbogast et al. (1997) to determine whether relative differences exist between the northwestern and southeastern parts
The European Soil Erosion Model (EUROSEM) : a dynamic approach for predicting sediment transport from fields and small catchments
The European Soil Erosion Model (EUROSEM) is a dynamic distributed model, able to simulate sediment transport, erosion and deposition over the land surface by rill and interill processes in single storms for both individual fields and small
Influence of vegetation cover on sand transport by wind : field studies at Owens Lake, California
Field studies conducted at Owens Lake, California, provide direct measurements of sand flux on sand sheets with zero to 20 per cent cover of salt grass. The results are reported here. A general empirical model provide for the relation between sand
This study examines factors affecting the spatial variability of soil infiltration in cultivated fields in a Mediterranean environment. The study area is a wine growing catchment located near the town of Roujan (Hérault). The factors affecting
variability of soil infiltration were analyzed. A simple classification of the topsoil structures is proposed. The results show that 40% of the total variance of observed infiltration rates can be explained either by differences between fields
Results from a three-year study are presented that integrate field work (in the Negev Desert of Israel), physical modeling (wind-tunnel testing at UC Davis), and numerical solutions of grain trajectories to model and explain sand transport over
a climbing dune. The numerical and experimental results have the same geometric shape and slope as those in the field.
Arid area ; California ; Evaporation ; Field experiment ; Grain size distribution ; Irrigation ; Sand ; Slope gradient ; Soil ; Soil moisture ; United States of America
, cobbles, or blocks between 2740 and 2775 m. The objectives of this study are to : evaluate the role of stone size in water conservation by comparing soil moisture under layers of stones with different sizes; replicate with an irrigation field experiment
New field investigations of the Achenheim sequence (Alsace, France) allow for the characterization of variations in the low-field magnetic susceptibility over most of the last climatic cycle, i.e., the past 130,000 yr. New stratigraphic data
The aim of this study was to determine if clear relationships could be found among magnetic susceptibility, (MS), mineral zones and field observations, so that a more practical, and more geographically encompassing system for stratigraphic division
of the Peoria Silt might be developed. The potential use of MS as a paleoclimate indicator by correlation to the marine oxygen isotope record is also addressed. The additional loess compositional data and field observations presented in this study build upon
In this paper, simple energetics modelling is used to compare velocity moment predictions with field observations of suspended sand transport rates. Separate consideration is given to transport associated with the 3 main frequency-dependent cross
-shore transport processes : that associated with the short (incident) waves, that due to the long infragravity waves, and transport associated with the mean flow. Comparison of the suspended load velocity moment predictions with field measurements