Reclamation of Prime Agricultural Land after Surface Mining Mineral Sands from the Virginia Coastal Plain: Variability in Physical and Chemical Properties and Productivity of Tailings

1995 ◽  
Vol 1995 (1) ◽  
pp. 175-185 ◽  
Author(s):  
M. H. Stolt ◽  
J. C. Baker ◽  
D. C. Martens ◽  
J. R. McKenna
Keyword(s):  
Coastal Plain ◽  
Agricultural Land ◽  
Chemical Properties ◽  
Surface Mining ◽  
Physical And Chemical Properties ◽  
Physical And Chemical ◽  
And Chemical Properties

scholarly journals Physical and Chemical Properties of Soil in the Sahelian Region: Case Study in Nioro du Rip, Senegal

2020 ◽  
pp. 73-82
Author(s):  
Landing Biaye ◽  
Fary Diome ◽  
Seybatou Diop ◽  
Modou Mbaye ◽  
Djibril Tine ◽  
...  
Keyword(s):  
Agricultural Land ◽  
Organic Matter Content ◽  
Chemical Properties ◽  
Principal Component ◽  
Fertility Level ◽  
Physical And Chemical Properties ◽  
Limited Information ◽  
Geochemical Composition ◽  
Physical And Chemical ◽  
And Chemical Properties

The locality of Nioro du Rip is facing intense erosion, loss of agricultural land, soil pollution and soil degradation. Today, there is limited information about the soil physical and chemical properties in the locality. In this work, we describe the main essential factors or mechanism that control the evolution of the soil in the study area. The physical and chemical properties of soils encountered along a NE-SW transect in are analyzed in this paper. The statistical analysis results revealed low structural stability of soils in general, due to their low organic matter content and exchangeable bases and their predominantly silty texture. A net trend towards acidification, which is more pronounced in the lower-bottom and terrace soils, provides information on the conditions that are increasingly unfavorable to agricultural development. The multivariate principal component analysis (PCA) identified the preponderance of two factors among the four primarily involved in soil geochemical composition. These include a mineralization process (expressed through the first principal component (PC1), which causes soils to be rich in elements (Ca2+, K+,C, N, MO) controlling their structure and fertility level;  The PC2 axis expresses the spatial differentiation phenomenon of the soil granulometric composition: soils forming cluster poles according to their textural affinity in the projection of the plane formed by these two components , with on one side the sandy-dominated soils of the shallows and terraces and on the other the clay-dominated soils of the plateau and the slope. A clear reversal of textural polarity in the studied topo sequence that must be blamed on the strong water erosion in this area.

Soil Degradation in Argan Woodlands, South Morocco

2020 ◽  
Author(s):  
Mario Kirchhoff ◽  
Lars Engelmann ◽  
Lutz Leroy Zimmermann ◽  
Irene Marzolff ◽  
Manuel Seeger ◽  
...  
Keyword(s):  
Soil Degradation ◽  
Agricultural Land ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Total N ◽  
Argan Tree ◽  
Single Ring ◽  
Physical And Chemical ◽  
Mg Content ◽  
And Chemical Properties

<p>The argan tree (Argania spinosa) populations, endemic to South Morocco, have been highly degraded. Although the argan tree is the source of the valuable argan oil and is protected by law, overbrowsing and -grazing as well as the intensification and expansion of agricultural land lead to tree and soil degradation. Young stands cannot establish themselves; undergrowth is scarce due to the semiarid/arid climate and thus, goats, sheep and dromedaries continually browse the trees. Canopy-covered areas decrease and are degraded while areas without vegetation cover between the argan trees increase.</p><p>On 30 test sites, 60 soil samples of tree and intertree areas were studied on their soil physical and chemical properties. 36 rainfall simulations and 60 single-ring infiltration measurements were conducted to measure potential differences between tree/intertree areas in their runoff/erosion and infiltration properties. Significant differences using a t-test were found for the studied parameters saturated hydraulic conductivity, pH, electric conductivity, percolation stability, total C-content, total N-content, K-content, Na-content and Mg-content. Surface runoff and soil erosion were not statistically significant, but showed similar trends due to the higher complexity of runoff formation. The soil covered by argan trees generally showed less signs of degradation than intertree areas. With ever-expanding intertree areas due to the lack of rejuvenation of argan trees a further degradation of the soil can be assumed.</p>

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