Soldiers that are deployed overseas are breathing ambient air containing concentrations of fine particulate matter known to cause adverse effects to human health. A study initiated in 2008 was designed to determine the concentrations and compositions of fine particulate matter i…
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Soil fertility decline has been said to constitute a major cause of low agricultural productivity and a threat to food security in SubSaharan Africa, especially in its ecologically fragile regions. Already nutrient-poor soils, subjected to continuous cropping, wind and water ero…
Scope and methods of study. (1) Scale effects on phosphorus (P) loss and runoff depth from pastures were investigated by summarizing water quality data from 19 research projects. Spatial (area) and temporal (days after litter application) scales ranged from 0.5 to 80000 m2 and 1…
Soil loss by wind and water varies considerably in time and space making it difficult to quantify. Monitoring methods are limited by accuracy, precision and replication. The 137Cs technique overcomes many of these problems and can provide net time- integrated soil flux measureme…
The purpose of this research is to evaluate results of dilatometer tests using numerical methods such that a theoretical basis can be established for determining soil properties with this test in saturated cohesive soils. In particular, this research represents an effort to deve…
Gas permeability of unsaturated fine grained soils was investigated using a new flexible wall biaxial permeability apparatus. The apparatus is capable of measuring gas permeability by three different non-steady state methods. Gas permeability of kaolin clay, silt and cement bent…
Egypt witnesses an increasing population growth concomitant with limited water and agricultural land resources. The objectives of this study were to utilize remotely sensed data for the inventory of agricultural lands in the Nile Delta, monitoring spatial and temporal variations…
Ocurrence in groundwater and use of pesticides. Environmental distribution and fate and exposure prediction. Pesticides and human health. Possible solutions. legislation and economy.
Assessment methods for soil carbon
by Lal, R.
fromAdvances in soil science (Boca Raton, Fla.)
0
Type: Book
Soil C pool of different ecoregions; Natural and anthropogenic disturbance; Methods; Recommendations and conclusions.
