Genetic variation in dry matter production, water use efficiency and survival under drought in four Acacia species studied in Baringo, Kenya
Total dry matter productivity, transpiration rate and their ratio, called water use efficiency, WUE, of 6-month-old potted seedlings of 4 dryland Acacia species were compared under irrigation in Baringo. Genetic variation in water use was measured
by lysimetry and compared with productivity and survival to determine the ecophysiological basis of variation. Evidence is presented correlating dry matter productivity with dehydration avoidance ability due to low conductance to water vapour, enhanced root
This study concerns the carbon isotope variations in organic matter from the Kashiru peat deposits, which span at least the last 40,000 yr. The δ13C values of total organic matter (TOM) were determined in order to estimate the relative abundances
Annual flows of energy, matter, and money were collected for the Ait Mizane tribe in the Imlil region of the High Atlas. Social and environmental pressures increasingly impinge on the system. - (DWG)
of silt+clay, coarse particles and organic matter. The aim of this paper is to provide a quantification and a spatial description of possible differences in soil status that can be linked to wind erosion.
-differentiated soil profiles is limited due to slope instability and restricted water avaibility. Susceptibility to erosion is high due to steep slopes, high silt and/or fine sand contents and low organic matter contents. Erosion control is being attempted
because of the incongruence between the logical assessment and the empirical subject matter, is here considered as the basis for the application of the evolutionary epistomological theory which not only recognises this incongruence but also clarifies
of the surface landforms is needless if only morphology matters, though it becomes necessary when the genesis and age of the relief are considered. - (L'A.).
the glacial-derived sediment of interest from material from other sources. Organic matter content is shown to be a good inverse indicator of sedimentation rates at two different time-scales.
126 soil and sedimentary rock samples from landslides and undisturbed weathering profiles were analysed for plasticity, shear strength, grain size distribution, clay mineralogy, carbonate content and content of organic matter. Spatial statistics
This study is a logical continuation of the recent trend toward the multiproxy investigation of environmental change in Atlantic Canada, the purpose of which is to study the organic matter, coarse sand, pollen, macrofossil, and chironomid content