Landscape Design Soil Science and Irrigation

Question 1

What are the three primary macronutrients found in most commercial fertilizers, represented by the NPK ratio?

Accepted Answer

Nitrogen, Phosphorus, Potassium

Answer

Nitrogen, Phosphorus, Calcium

Answer

Nitrate, Potash, Kelp

Answer

Niacin, Phosphate, Kieserite

Question 2

Which soil texture has the highest water-holding capacity?

Accepted Answer

Clay soil

Answer

Sandy soil

Answer

Loamy soil

Answer

Gravelly soil

Question 3

What is the 'field capacity' of soil?

Accepted Answer

The amount of water soil holds after excess drainage has occurred

Answer

The maximum amount of soil a site can hold before erosion occurs

Answer

The total weight of plants a soil can support

Answer

The depth at which soil temperature remains constant

Question 4

What does a soil percolation test measure?

Accepted Answer

The rate at which water drains through the soil

Answer

Soil nutrient levels at various depths

Answer

The compaction level of the soil surface

Answer

The presence of soil-borne pathogens

Question 5

Which irrigation system type delivers water directly to the root zone, minimizing evaporation and runoff?

Accepted Answer

Drip irrigation system

Answer

Overhead spray system

Answer

Rotary sprinkler system

Answer

Flood irrigation system

Question 6

What is 'organic matter' in soil and why is it important for landscape planting?

Accepted Answer

Decomposed plant and animal material that improves soil structure, fertility, and water retention

Answer

Synthetic nutrients added to improve fertility

Answer

The living microbial population in the soil

Answer

Rock minerals that release nutrients slowly