5 Written Questions

1. Plinthite accumulation, very dense layer of oxides in tropical areas
2. jarosite, a pale yellow mineral
3. NO3-, NH4+, Proteins, amino acids
4. plowed, A
5. the status of soil with respect to the amount and availability to plants of elements to the growth of plants

5 Matching Questions

1. w
2. C
3. R
4. soil productivity
5. d

1. a Consolidated Rock
2. b Physical root restriction: naturally occurring or man-made unconsolidated material, very compacted layers
3. c Weak clay accumulation, B
4. d the capacity of a soil for producing a specified plant under a specified system of management.
5. e Parent Material (unconsolidated)

5 Multiple Choice Questions

1. a three-dimensional vertical soil prism
   1. paleosol
   2. soil tessera
   3. soil profile
   4. soil conservation
2. nutrient absorbtion through root extension
   1. soil conservation
   2. reduction
   3. oxidation
   4. Root interception
3. highly decomposed, only with O Horizon
   1. a
   2. k
   3. i
   4. q
4. A soil formed on a landscape in the past with distinctive morphological features resulting from a soil-forming environment that no longer exists at the site
   1. pedology
   2. Potassium
   3. s
   4. paleosol
5. a combination of all management and land-use methods that safeguard the soil against deterioration by natural or man-induced factors
   1. soil conservation
   2. soil profile
   3. illuviation
   4. Root interception

5 True/False Questions

1. n → Na+ accumulation, B or C in arid soils

   True        False

2. y → gypsum, B or C arid areas

   True        False

3. g → Gleying: Bluish color, very wet B and C horizons

   True        False

4. Coenzyme → O2, H2O, CO2 carbohydrates

   True        False

5. Glacial Till → the downward movement of clay and humus in suspension or solution from a layer or layers of soil

   True        False