Silt

Soil Erodibility Factor (K) The soil erodibility factor (K), a measure of the susceptibility of soil to erosion under standard conditions, is a function of the percentage of silt and coarse sand, the soil structure, the permeability of the soil, and the percentage of organic matter. Wischmeier et al. (1971) defined the soil erodibility factor mathematically and Foster et al. (1996) converted the equation into the following SI unit equation: The soil erodibility factor (K) is determined for each…

territories; Upper Egypt, which consisted of the nile itself; and Lower Egypt, which consisted of the territory known to us today as the Nile River Delta. Even in a desert environment, Egypt was known for its thriving agriculture industry thanks to fertile silt, the yearly flooding of the Nile, and their technological and industrial advancements in irrigation and canal building. In terms of government, the civilization of Egypt operated under dynastic rule. There were 31 separate dynasties in…

Introduction Historical fiction is a genre of text which identifies the true based context of historical events. The novel Pharaoh, by Jackie French, is a perfect representation of this specific genre of writing. In this perfect example based in ancient Egypt, the protagonist Narmer conquers the land and joins the society of Egypt to one civilization. Through this, the lives of the citizens of Egypt change and sculpt around many things such as farming, trade, religion, and geography. The role…

So, if just one part of a reef fails or dies, all of these animals and many more die. Now that you see how many creatures are affected by pollution, let’s get into the pollution itself. Over ¼ of coral reefs are threatened by onshore activities. There are six main forms of pollution that worry scientists the most. They are: • Pesticides; many pesticides and fertilizers find their way into our oceans. This may not sound too bad, but they boost the growth rates of the algae, which blocks much…

The Pinturas Formation (Middle Miocene) includes a sedimentary succession exposed at the Río Pinturas valley, Santa Cruz province, Argentina. It is separated in three members. The lower and the upper ones were dominated by ashfall episodes with paleosol formation during stability times; while the middle member is represented by desert eolian deposits. Mentioned palaeosols bears a moderately diverse ichnofauna. Trace fossils presents are Coprinisphaera murguiai, C. ispp., Loloichnus baqueroensis,…

How Many Dynasties? It depends. The word dynasties could mean a lot of things. Amazingly, nobody can make a clear cut number of dynasties, because many questions arise. Was the Han one or two dynasties. Was the Xin really a dynasty, even though it was wedged between the Eastern and the Western Han periods. Were the Three Kingdoms of the same country anymore? The Shun dynasty only lasted a few weeks before the Manchus took over and formed the Qing, so does it count as a dynasty? More…

People depended on the yearly flood of the Nile to water crops. Fields in the Nile floodplain covered in water and fertilized by a new batch of silt, this season was Akhet, or the flood season. It lasted from mid-June to mid-October. The next season was Peret, the planting and growing season, which went from mid-October to mid-February. In this season waters receded, but the Nile was high enough…

oil in the basin. The basin itself is constituted, as described by Biddle et al ( 1991), has a cumulative thickness greater than 9 km and consists primarily of of middle Miocene to Holocene age sediments ( Hayba, 1995). Mainly consisting of sand, silts, and clays, the source rock of hydrocarbons found…

A rare species of fish nearing extinction The rare species of the spotted handfish is nearing extinction after roaming this earth for more that 55 million years. It is said their population decrease is due to pollution, people capturing them for pets and much more. So help keep this species alive. What makes these little fish so special is evident in their name. As their name suggests The spotted handfish (Brachionichthys hirsutus) is one of the world's most endangered marine fish. This…

the sand. Clay is also another type of soil, unlike sand clay can hold water and nutrients very well. Though clay can also hold toxins in the soil, this means that the clay can prevent the entrance of chemicals that could possibly kill the plants. Silt is made when you mixed clay and sand together, this means that it has the properties of both sand and clay which makes it ideal to use it in a…