Agricultural Science Past Exam Questions Soil Science
... (i) Explain the following terms as used in the context of plant growth in soil; 1. field capacity, 2. permanent wilting point, 3. available water. (ii) The following table shows the water content of three soil samples. 1. What is the percentage of available water in sample A? 2. Which sample would b ...
... (i) Explain the following terms as used in the context of plant growth in soil; 1. field capacity, 2. permanent wilting point, 3. available water. (ii) The following table shows the water content of three soil samples. 1. What is the percentage of available water in sample A? 2. Which sample would b ...
soil makeup
... Soil Components • Solid portions (50 percent of soil volume) ▫ Mineral matter 45 percent of the soil Inorganic material originating from rock. Determine the soil’s ability to hold water and ...
... Soil Components • Solid portions (50 percent of soil volume) ▫ Mineral matter 45 percent of the soil Inorganic material originating from rock. Determine the soil’s ability to hold water and ...
Rangeland Succession Noteguide
... These plants die, and they add more nutrients to the soil. Shrubs and tress can then survive. Insects, small birds, and mammals begin to inhabit. ** What was once bare rock now supports a variety of life. ** We manage forces that cause these changes. Forces of Ecosystem Change Immigration ...
... These plants die, and they add more nutrients to the soil. Shrubs and tress can then survive. Insects, small birds, and mammals begin to inhabit. ** What was once bare rock now supports a variety of life. ** We manage forces that cause these changes. Forces of Ecosystem Change Immigration ...
What is Soil?
... EXTRA-Surface area -Ask the students to predict which will have more surface are: a bucket with several large balls or a bucket of the same size with many small balls. -Demonstrate surface area with square objects, have students refine prediction -Demonstrate with different size balls, make the conn ...
... EXTRA-Surface area -Ask the students to predict which will have more surface are: a bucket with several large balls or a bucket of the same size with many small balls. -Demonstrate surface area with square objects, have students refine prediction -Demonstrate with different size balls, make the conn ...
Soil Conservation
... Contour Plowing • Contour plowing=farmers plow their fields along the curves of a slope. • This helps slow the runoff of excess rainfall and prevents it from washing the soil away. ...
... Contour Plowing • Contour plowing=farmers plow their fields along the curves of a slope. • This helps slow the runoff of excess rainfall and prevents it from washing the soil away. ...
Topic 5.3 Soil Degradation
... Generally commercial industrialised food production systems reduce soil fertility more than small-scale subsistence farming ...
... Generally commercial industrialised food production systems reduce soil fertility more than small-scale subsistence farming ...
System Type: Septic Tank to Soil Absorption Trenches
... Advantages: Septic tank to soil absorption trenches are passive, simple and low maintenance systems. They can effectively treat sewage and there performance has been extensively studied. They are also a reasonably priced system where soil conditions permit their installation. Disadvantages: These sy ...
... Advantages: Septic tank to soil absorption trenches are passive, simple and low maintenance systems. They can effectively treat sewage and there performance has been extensively studied. They are also a reasonably priced system where soil conditions permit their installation. Disadvantages: These sy ...
Soils rich in
... • It is the upper layer of the soil, which is nearer to the surface. It is the top soil. • This layer includes organic litter such as fallen leaves and twigs which helps in preventing erosion, holding moisture and in decaying to form a rich soil know as HUMUS. • It provides nutrients for the surviva ...
... • It is the upper layer of the soil, which is nearer to the surface. It is the top soil. • This layer includes organic litter such as fallen leaves and twigs which helps in preventing erosion, holding moisture and in decaying to form a rich soil know as HUMUS. • It provides nutrients for the surviva ...
Soil Texture Lab
... 9. Now that you have determined the type of soil samples that you have, use the soil texture by feel chart below and see if you get the same answers. ...
... 9. Now that you have determined the type of soil samples that you have, use the soil texture by feel chart below and see if you get the same answers. ...
Types of Organic Matter (SOM) - NRCS
... Age of the carbon, size of the carbon fractions, and total content of the organic matter present will cause differences. All Illinois soils contain organic matter! Naturally occurring dark prairie soils contain more organic matter than light colored timber soils. ...
... Age of the carbon, size of the carbon fractions, and total content of the organic matter present will cause differences. All Illinois soils contain organic matter! Naturally occurring dark prairie soils contain more organic matter than light colored timber soils. ...
Compacted Zone In Soil - NRCS
... The size and continuity of pores controls whether larger microbes, such as protozoa, can prey upon bacteria and fungi. Smaller pores favor bacteria and smaller predators over fungi and larger predators. Arthropods are severely affected by compaction. The predatory species of nematodes is also affect ...
... The size and continuity of pores controls whether larger microbes, such as protozoa, can prey upon bacteria and fungi. Smaller pores favor bacteria and smaller predators over fungi and larger predators. Arthropods are severely affected by compaction. The predatory species of nematodes is also affect ...
Landforms from Erosion and Deposition by Gravity Quiz
... a) can be triggered by earthquakes. b) are common on gradual slopes in desert environments. c) are sudden falls of rock. d) all of the above e) a and c, but not b 3) The gradual movement of soil d ...
... a) can be triggered by earthquakes. b) are common on gradual slopes in desert environments. c) are sudden falls of rock. d) all of the above e) a and c, but not b 3) The gradual movement of soil d ...
soils webquest - cloudfront.net
... 4. What is the common process occurring in the B Horizon? Why do you think the B Horizon is sometimes called the “Zone of Accumulation”? 5. How are the C & R Horizons related? Part D. Properties of Soils (Link #5 – use google to search for answers 1. What are the four most important properties of so ...
... 4. What is the common process occurring in the B Horizon? Why do you think the B Horizon is sometimes called the “Zone of Accumulation”? 5. How are the C & R Horizons related? Part D. Properties of Soils (Link #5 – use google to search for answers 1. What are the four most important properties of so ...
Heuchera Peach Flambe
... Dig a hole approximately twice the size of the container. Remove plant and place into the hole so the soil level is the same as the surrounding ground. Fill in the hole and push down firmly and water in thoroughly. ...
... Dig a hole approximately twice the size of the container. Remove plant and place into the hole so the soil level is the same as the surrounding ground. Fill in the hole and push down firmly and water in thoroughly. ...
soil
... • Soil is a complicated material that exhibits complex behavior • Soils are encountered in a seemingly infinite number of forms • Spatial variability may be substantial even at a given site • Boring and sampling gives a very incomplete description • Behavior often governed by “defects” • soil mechan ...
... • Soil is a complicated material that exhibits complex behavior • Soils are encountered in a seemingly infinite number of forms • Spatial variability may be substantial even at a given site • Boring and sampling gives a very incomplete description • Behavior often governed by “defects” • soil mechan ...
Soils
... Topography Drier, well drained soils are often found in sloping hillsides. Erosion is often a problem here and can lead to lose of topsoil. ...
... Topography Drier, well drained soils are often found in sloping hillsides. Erosion is often a problem here and can lead to lose of topsoil. ...
Appendix A: Soil Classification Soil is a complex material whose
... Rock fragments may be included within soils of various textures. Based on size and shape, the rock fragments in the Colorado-Lower Gila Watershed are categorized as gravels (spherical or cube like, 2-75 mm diameter), cobbles (spherical or cube like, 75-250 mm diameter), and flagstones (flat and 150 ...
... Rock fragments may be included within soils of various textures. Based on size and shape, the rock fragments in the Colorado-Lower Gila Watershed are categorized as gravels (spherical or cube like, 2-75 mm diameter), cobbles (spherical or cube like, 75-250 mm diameter), and flagstones (flat and 150 ...
This dataset consists of 3 GIS maps that indicate the soil biomass
... This dataset consists of 3 GIS maps that indicate the soil biomass productivity of grasslands and pasture, of croplands and of forest areas in the European Union (EU27). The degree to which the soil carries out its biomass production service was evaluated on the basis of soil properties under prevai ...
... This dataset consists of 3 GIS maps that indicate the soil biomass productivity of grasslands and pasture, of croplands and of forest areas in the European Union (EU27). The degree to which the soil carries out its biomass production service was evaluated on the basis of soil properties under prevai ...
VERT-EXPERT “TRADITION”: Organic Mineral “Slow Release
... Proteins, soluble sugars and humic evolution of the components all act upon both the rhizosphere (bacteria developing around the roots) and the mycorrhizae (through symbiosis between soil fungi and roots). The selection of “Premium” ingredients develops the biomass and the biological soil activity . ...
... Proteins, soluble sugars and humic evolution of the components all act upon both the rhizosphere (bacteria developing around the roots) and the mycorrhizae (through symbiosis between soil fungi and roots). The selection of “Premium” ingredients develops the biomass and the biological soil activity . ...
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.