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Vertisols: Usually mollic epipedon; high in shrinking and swelling clays; >30% clay to a depth of 50 cm; deep cracks (called gilgai) form when soil dries; form from parent material high in clay (e.g., shales, basins, exposed Bt horizons of old soils); 2.4% of global and 1.7% of U.S. ice-free land.
The word "Gelisol" comes from the Latin gelare meaning "to freeze", a reference to the process of cryoturbation that occurs from the alternating thawing and freezing characteristic of Gelisols. In the World Reference Base for Soil Resources [1] (WRB), most Gelisols belong to the Cryosols. In soil taxonomy, Gelisols key out before the Histosols ...
Distribution of Gleysols. A gleysol or gley soil is a hydric soil that unless drained is saturated with groundwater for long enough to develop a characteristic gleyic colour pattern.
Histosols form whenever organic matter forms at a more rapid rate than it is destroyed. This occurs because of restricted drainage precluding aerobic decomposition, and the remains of plants and animals remain within the soil. Thus, Histosols are very important ecologically because they, and Gelisols, store large quantities of organic carbon.
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A percolation test consists of digging one or more holes in the soil of the proposed leach field to a specified depth, presoaking the holes by maintaining a high water level in the holes, then running the test by filling the holes to a specific level and timing the drop of the water level as the water percolates into the surrounding soil.
Officials have so far recovered 44 packages, allowing them to be “delivered to their rightful owners.” Lewis was charged with grand theft, illegal dumping and organized scheme to defraud.
Billionaire Frank McCourt told Yahoo Finance he is still interested in acquiring TikTok if it isn't able to overturn a federal law that demands the Chinese-owned social media app be sold to a US ...