Root Characteristics and Soil Conditions - Test Questions

1. Chapter 3 - Sample Test Questions 1. Most of the fine absorbing roots are typically found near the soil surface because a. Roots grow where conditions are favorable. b. Roots need UV light to drive respiration c. The ph of the soil is generally higher near the surface d. Phosphorous and potassium are more available

2. Chapter 3 - Sample Test Questions 2. Microrganisms tend to congregate in the rhizosphere, in part, because a. Sugar exudates from the root tips are a source of food. b. Mycorrhizae fix nitrogen and make it available. c. Root hairs tend to collect cations essential to microorganisms growth. d. Bacteria preferentially feed on the meristem tissue at the root tips.

3. Chapter 3 - Sample Test Questions 3. If a planting hole in a clay soil site is backfilled with sandy soil a. Drainage will be improved, helping the tree to establish. b. Nutrients will be more available to the newly established roots within the planting hole c. Water will drain very slowly out of the planting hole d. The improved texture of the backfill will reduce the chances of girdling roots forming later

4. Chapter 3 - Sample Test Questions 4. When soil is compacted: a. Micropores combine to form macropores b. Soil aggregates are broken up, giving the soil a finer texture c. A high water content will reduce the damaging effects d. Total pore space and the percentage of macropores are reduced

5. Chapter 3 - Sample Test Questions 5. A characteristic of sandy soils in arid regions is that they a. Tend to become alkaline, and salts build up due to the lack of heavy rainfall b. Tend to become acid because basic ions leach out c. Are fine in texture due to the high sand content d. Have a high water-holding capacity because rainfall is scarce