kirinyaga central district joint examination - 2013
... Differentiate between rockslide and soil creep. - Rock slide involves movement of large masses of rocks soil creep involves movement of soil / fine materials. 2mks - Rock slide occurs on a very steep slope. Soil creep on a gentle slope. 2mks - Rock slide fast speed. Soil creep has a very slow s ...
... Differentiate between rockslide and soil creep. - Rock slide involves movement of large masses of rocks soil creep involves movement of soil / fine materials. 2mks - Rock slide occurs on a very steep slope. Soil creep on a gentle slope. 2mks - Rock slide fast speed. Soil creep has a very slow s ...
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... What do the initials GMO stand for and give an example of an input trait present in some crops? genetically modified organisms; insect resistance Entomology What is the protein responsible for the hardening of the insect integument? ...
... What do the initials GMO stand for and give an example of an input trait present in some crops? genetically modified organisms; insect resistance Entomology What is the protein responsible for the hardening of the insect integument? ...
Explaining a Soil Profile
... from the interaction of such soil-forming factors as parent material, slope, native vegetation, weathering, and climate. As a soil ages, horizontal layers develop and changes result. The causes of these changes are classified as four processes: addition, loss, translocation, and transformation. Ther ...
... from the interaction of such soil-forming factors as parent material, slope, native vegetation, weathering, and climate. As a soil ages, horizontal layers develop and changes result. The causes of these changes are classified as four processes: addition, loss, translocation, and transformation. Ther ...
Soil Testing Lab
... Nations, including the United States have been built on the riches of their soils. Yet, since the beginnings of agriculture people have abused this vital, potentially renewable resource. In fact, entire civilizations have collapsed because of mismanagement of the topsoil that supported their civiliz ...
... Nations, including the United States have been built on the riches of their soils. Yet, since the beginnings of agriculture people have abused this vital, potentially renewable resource. In fact, entire civilizations have collapsed because of mismanagement of the topsoil that supported their civiliz ...
Soil Texture and Textural Class
... textural class. The relative size of particles defined as sand, silt, and clay. How to determine a soil's textural class using the textural triangle when the soil texture is known. How to estimate a soil's textural class by the "feel" ...
... textural class. The relative size of particles defined as sand, silt, and clay. How to determine a soil's textural class using the textural triangle when the soil texture is known. How to estimate a soil's textural class by the "feel" ...
AP Environmental Science Student Sample Question 4
... “such as millipedes” as a specific biotic component of the A horizon, and 1 point was earned in (b)(ii) for identifying “macronutrients such as nitrogen oxides” as an abiotic component of the A horizon. Two points were earned in part (c): 1 point was earned in (c)(i) for correctly identifying “Ferti ...
... “such as millipedes” as a specific biotic component of the A horizon, and 1 point was earned in (b)(ii) for identifying “macronutrients such as nitrogen oxides” as an abiotic component of the A horizon. Two points were earned in part (c): 1 point was earned in (c)(i) for correctly identifying “Ferti ...
When are Secondary or Micronutrients Needed for Tennessee Farm
... recommended for burley or dark tobacco when soil tests less than 1.2 pounds of boron per acre, anywhere deficiency symptoms have been noted previously or where plant analysis results show a need for boron. This is a one-time application for tobacco, to be followed with additional soil testing next s ...
... recommended for burley or dark tobacco when soil tests less than 1.2 pounds of boron per acre, anywhere deficiency symptoms have been noted previously or where plant analysis results show a need for boron. This is a one-time application for tobacco, to be followed with additional soil testing next s ...
Lesson 1
... matter) cling together in the soil, they create porous spaces that allow for the movement of water and air. Soil structure depends on the way soil particles bind together when influenced by multiple factors, including: texture, the amount of clay and humus; weather and water behavior (freezing/thawi ...
... matter) cling together in the soil, they create porous spaces that allow for the movement of water and air. Soil structure depends on the way soil particles bind together when influenced by multiple factors, including: texture, the amount of clay and humus; weather and water behavior (freezing/thawi ...
VIC - University of Washington
... • CLM-VIC simulated ET is closer to observed whereas CLM3 in general underestimates ET. The timing of base flow in CLM-VIC is consistent with the timing of the maximum soil moisture storage, whereas in CLM3 it is lagged by about two months. • The net radiation is well simulated in both models. CLM-V ...
... • CLM-VIC simulated ET is closer to observed whereas CLM3 in general underestimates ET. The timing of base flow in CLM-VIC is consistent with the timing of the maximum soil moisture storage, whereas in CLM3 it is lagged by about two months. • The net radiation is well simulated in both models. CLM-V ...
Weathering and Soil Formation
... Temperate Forest and Grassland Climates Temperate forest and grassland climates get enough rain to cause a high level of chemical weathering, but not too much that nutrients are leached out. Arctic Climates In arctic climates, as in desert climates, chemical weathering occurs very slowly. Low temper ...
... Temperate Forest and Grassland Climates Temperate forest and grassland climates get enough rain to cause a high level of chemical weathering, but not too much that nutrients are leached out. Arctic Climates In arctic climates, as in desert climates, chemical weathering occurs very slowly. Low temper ...
Chapter 2 Minerals and Rocks Lecture Notes Earth Science
... dark brown soil that is a mixture of humus, clay, and other minerals. The next layer, the B horizon, often called subsoil, usually consists of clay and other particles washed down from the A horizon, but little humus. Below that layer is the C horizon, which contains only partly weathered rock. Scie ...
... dark brown soil that is a mixture of humus, clay, and other minerals. The next layer, the B horizon, often called subsoil, usually consists of clay and other particles washed down from the A horizon, but little humus. Below that layer is the C horizon, which contains only partly weathered rock. Scie ...
Weathering and Erosion
... 6 square inches. If this cube is broken down into 8 cubes each 0.5 " on a side the total surface area increases to 24 square inches. ...
... 6 square inches. If this cube is broken down into 8 cubes each 0.5 " on a side the total surface area increases to 24 square inches. ...
Warm Up
... Biomes and Microclimate • Climate determines which organisms can survive in which biome • Conditions in temperature and precipitation can vary from the conditions ...
... Biomes and Microclimate • Climate determines which organisms can survive in which biome • Conditions in temperature and precipitation can vary from the conditions ...
Environmental Consequences of Mining
... process recovered ore. The result is the resulting mine effluent is typically a stew of hazardous acidgenerating sulphides, toxic heavy metals, waste rock impoundments and water—and it is often deposited nearby in large free-draining piles where it can pollute land and water supplies for decades to ...
... process recovered ore. The result is the resulting mine effluent is typically a stew of hazardous acidgenerating sulphides, toxic heavy metals, waste rock impoundments and water—and it is often deposited nearby in large free-draining piles where it can pollute land and water supplies for decades to ...
Weathering and Soil Formation
... Temperate Forest and Grassland Climates Temperate forest and grassland climates get enough rain to cause a high level of chemical weathering, but not too much that nutrients are leached out. Arctic Climates In arctic climates, as in desert climates, chemical weathering occurs very slowly. Low temper ...
... Temperate Forest and Grassland Climates Temperate forest and grassland climates get enough rain to cause a high level of chemical weathering, but not too much that nutrients are leached out. Arctic Climates In arctic climates, as in desert climates, chemical weathering occurs very slowly. Low temper ...
Forms of energy involved in soil formation
... Therefore, the question arises: How much soil is formed with time, under different climatic, geological, topographical, hydrological and biotic conditions, under the influence of human activities, including climate change. An international research group on critical zone processes is targeting this ...
... Therefore, the question arises: How much soil is formed with time, under different climatic, geological, topographical, hydrological and biotic conditions, under the influence of human activities, including climate change. An international research group on critical zone processes is targeting this ...
Soil Biodiversity
... undisturbed forest floor and mineral soil (e.g., by avoiding intense burning or excessive mechanical site preparation). Some types of organisms, such as the underground mushrooms, need an intact community of mammals, particularly small mammals, to disperse spores from areas where colonies of the fun ...
... undisturbed forest floor and mineral soil (e.g., by avoiding intense burning or excessive mechanical site preparation). Some types of organisms, such as the underground mushrooms, need an intact community of mammals, particularly small mammals, to disperse spores from areas where colonies of the fun ...
Corn Suitability Rating (CSR) Background and Update
... Another key feature is the use of simple weighted average values for each soil map unit in Iowa. There are more than 10,000 soil map units in Iowa, and they are more complex than many users of soil surveys realize. A typical soil map unit routinely contains a dominant soil series and one or two mino ...
... Another key feature is the use of simple weighted average values for each soil map unit in Iowa. There are more than 10,000 soil map units in Iowa, and they are more complex than many users of soil surveys realize. A typical soil map unit routinely contains a dominant soil series and one or two mino ...
Tillage
Tillage is the agricultural preparation of soil by mechanical agitation of various types, such as digging, stirring, and overturning. Examples of human-powered tilling methods using hand tools include shovelling, picking, mattock work, hoeing, and raking. Examples of draft-animal-powered or mechanized work include ploughing (overturning with moldboards or chiseling with chisel shanks), rototilling, rolling with cultipackers or other rollers, harrowing, and cultivating with cultivator shanks (teeth). Small-scale gardening and farming, for household food production or small business production, tends to use the smaller-scale methods above, whereas medium- to large-scale farming tends to use the larger-scale methods. There is a fluid continuum, however. Any type of gardening or farming, but especially larger-scale commercial types, may also use low-till or no-till methods as well.Tillage is often classified into two types, primary and secondary. There is no strict boundary between them so much as a loose distinction between tillage that is deeper and more thorough (primary) and tillage that is shallower and sometimes more selective of location (secondary). Primary tillage such as ploughing tends to produce a rough surface finish, whereas secondary tillage tends to produce a smoother surface finish, such as that required to make a good seedbed for many crops. Harrowing and rototilling often combine primary and secondary tillage into one operation.""Tillage"" can also mean the land that is tilled. The word ""cultivation"" has several senses that overlap substantially with those of ""tillage"". In a general context, both can refer to agriculture. Within agriculture, both can refer to any of the kinds of soil agitation described above. Additionally, ""cultivation"" or ""cultivating"" may refer to an even narrower sense of shallow, selective secondary tillage of row crop fields that kills weeds while sparing the crop plants.