A3 transition to b horizon b horizin b horizon zone

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A3 - transition to B-horizon B horizin B-Horizon - zone of accumulation B1- transition but more like B B2 - maximum accumulation of colloids B3 - transition to C-horizon C horizin C-Horizon - weathered rock D or R horizon Bedrock 6. Know what is meant by soil texture? Loam 33.3 Clay 33.3 Silt 33.3 Sand How does soil texture relate to the general quality of the soil regarding: Tillage Water holding capacity 7. Have a basic understanding of soil nutrients as discussed in class. macro soil nutrients 20%Nitrogen (N) 10%Phosphorus (P) 10% Potassium (K) micro soil nutrients Micro - trace elements Boron on tomatoes
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soil pH pH: 0 to 7 acid 7 is Neutral 7 to 14 basic 8. In a general sense, be able to distinguish the difference between the three major soil forming processes. Podzolization Podzolization 1. Climate with strong seasonal (warm & cold) conditions and with adequate moisture (midlatitudes) 2. Soil is generally fairly rich 3. Nutrients returned to the soil by decomposition of fallen leaves C alcification 1. Arid regions (lack of water) 2. Fairly wide range in soil fertility 3. Strong accumulation of salts & minerals at the surface action of water Desert Soil - rich to poor (sometimes toxic) Prairie Soil - Rich L aterization 1. Tropical regions 2. Strong leaching 3. Impoverished soils 4. Mostly insoluble material in soil 9. What is the impact of each of the above processes on the overall quality of the soils which are produced? Podzolization C alcification L aterization 10. Know how rivers erode the landscape. Fluvial Erosion: Unchanneled flow Overland flow • Rain splash erosion Sheet Erosion Rill Erosion Gully Erosion 11. Be familiar with the different ways that a stream can transport material: solution suspension saltation traction 12. Understand what Frictional Index is and how it impacts stream velocity. Stream Erosional Power Dependent upon: 1. Velocity 2. Volume 3. Load Stream Velocity Depends on - Gradient - Volume Greater Volume = Greater Velocity [Refer to: Slide 31 of 143] Perimeter/Area=Index Cir = 3.14 x dia Perimeter = Cir ÷ 2 Area = r π 2 ÷ 2 13. Know what is meant by steam Competence and how it is calculated.
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