“Black soils” recently proposed by the FAO Global Soil Partnership, include fertile soils, characterized a thick, dark-colored soil horizon rich in organic matter. This study addressed concept of “black soils”, terms taxonomic relationship their corresponding types existing classifications. Similarity studies were based on calculation distances between selected groups with matter–enriched horiz...

The most common form of onsite domestic wastewater treatment in the United States is the septic system. Although the design of these systems has been well established, no systematic evaluation of septic system performance exists for sloping hardpan soils. In this paper, we develop a simple hydrologic model for assessing the probability of failure for a set of hydrologic conditions, septic loadi...

Iron deficiency chlorosis in plants is often associated with soil conditions that appear to restrict exchange of gases with the atmosphere, such as fine texture, lack of aggregation, excessive moisture, or discontinuity in the profile in the form of plowsole, hardpan, claypan, or stratified deposits. These conditions can cause CO2 to accumulate in the soil and, particularly in calcareous soils,...

The construction of highway route is influenced by geology, geotechnical, topography, and geomorphology the terrain. However, for pavement that failed structurally, a critical investigation required to ascertain cause(s) its failure, so such study can assist during rehabilitation/re-construction phase. Based on this, incessant Ondo – Ore was studied using integrated methods. Electrical resistiv...

Southeastern USA production is limited in Acrisols (Paleudults and Kandiudults) because they have high strengths and low water holding capacities. Production systems with crop rotations or deep tillage before planting were compared with less intensive management. Production systems included double-crop wheat (Triticum aestivum L.) and soybean (Glycine max L. Merr.) that were drilled in 0.19 m-r...

The broad correspondence between the sclerophyllous shrub form and the climate in mediterranean-type ecosystems indicates a climatic control over the vegetation particularly with respect to the summer drought, but all five regions are noted for nutrient deficiencies, especially Australia and South Africa. As studies of these ecosystems are completed, divergences related to the control of commun...