Splash and Sheet Erosion. The first step in the erosion process begins as raindrops impact the soil surface. Raindrops typically fall with a velocity of 20-30 feet per second. The energy of these impacts are sufficient to displace soil particles as high as two feet vertically. In addition‚ the impact of a rainfall on a bare soil can compact the upper layer of soil‚ creating a hard crust that inhibits plant establishment. Sheet erosion occurs as runoff travels over the ground‚ picking up and transporting
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of the centrifuge increases. The G-force increases as the speed of the centrifuge increases. Which is likely the best speed to separate the components of this soil sample? Why? The best speed to seperate the components of this soil sample would be 5000 rpm because there are only two layers so the soil is more separate in that speed. Describe in which layers you are likely to find the organic matter‚ gravel‚ sand‚ silt‚ and clay at the following speeds:
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Excellent; I couldn’ t have written a better paper myself. DIVERSITY OF PLANTS Plants evolved more than 430 million years ago from multicellular green algae. By 300 million years ago‚ trees had evolved and formed forests‚ within which the diversification of vertebrates‚ insects‚ and fungi occurred. Roughly 266‚000 species of plants are now living. The two major groups of plants are the bryophytes and the vascular plants; the latter group consists of nine divisions that have living members. Bryophytes
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Report –Soils Soil ph Soil texture Soil organic matter Soil water retention Two soil samples were consistently used for all four test completed below. The first is labelled as Valley A‚ and was obtained from a field which has been known to be uncultivated for 10 years in the valley. Valley B was obtained from a domestic garden‚ under a Magnolia tree in the same region. At times when a third sample was tested‚ the source will be indicated. Soil texture
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FIELD AND LABORATORY TESTS 8 6. SAFE BEARING CAPACITY 9 7. CONCLUSIONS AND RECCOMENDATIONS 10 1. Abstract: The appropriate scope of a geotechnical investigation is a function of the type of proposed land use or project‚ the soil/ geologic conditions of the project site‚ and type of permit or approval sought. The geotechnical consultant is responsible for targeting the scope of their investigation‚ testing‚ analyses‚ and documentation to balance these factors. References are
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Plants and animals have a lot of things in common so much in fact i couldn’t fit half of them into this essay‚ there similarities and differences span from the smallest things like cells to huge thing like the whole organism. One thing that plants and animals both have in common is the fact that they adapt‚ the main thing isn’t that they adapt though it’s why they do it. Animals‚ plants‚ and humans all share the same thing they have a will to live in different ways maybe or some might want to live
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Soil Porosity & Density Objective: To determine if the porosity of soil is related to the density. Hypothesis: I think that that the porosity of soil is related to the density because the higher the density of the sand the lower the porosity of the sand‚ which are both componets for the water to rise. Materials: • Sand and Loam samples • 2 large containers • Plastic cups • Water • Scale Procedure: Loam 1) The loam without the water was fresh ‚ it had different shades of black‚ and
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Viroids are plant pathogens that consist of a short stretch (a few hundred nucleobases) of highly complementary‚ circular‚ single-stranded RNA without the protein coat that is typical for viruses.[1] The smallest discovered is a 220 nucleobase scRNA (small cytoplasmic RNA) associated with the rice yellow mottle sobemovirus (RYMV).[2] In comparison‚ the genome of the smallest known viruses capable of causing an infection by themselves are around 2kilobases in size. The human pathogen hepatitis D is
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In the documentary Food Inc.‚ food-borne illness was one of the leading themes and also gave a story to go along with it. The director’s main argument was to show consumers where their food is coming from and the beginning stage of how it all begins‚ before getting on the table. “The Center for Disease Control estimated that each year roughly 1 in 6 Americans get sick from foodborne diseases” (CDC‚ 2016). There are many types of food-borne illnesses‚ but the one thing that they all have in common
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different concentrations of salt water effect plants. The test that will be performed will prove which concentration will have the worst effect. The hypothesis is that by measuring the plants growth each day‚ the largest concentration of salt will harm the plants the most. First‚ the plants were purchased and the water was prepared with the salt concentrations. Second‚ the plants were watered each day with the different concentrations of salt. Third‚ the plants’ growth were observed and recorded each
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