Q4b- Plant Nutrition Soils Flashcards
Which of these elements is a plant macronutrient?
All of these are macronutrients
How many essential elements are there for most plant species?
17
The primary soil horizon consists of highly weathered & chemically transformed sub-soil is the…
B Horizon
Silt-sized mineral particles are…
2-20 micrometers in diameter
A soil with mineral particles 33.3% sand, 33.3% silt, and 33.3% clay (exactly equal portions) would be categorized (see soil texture triangle) as a…
Clay Loam
Why are the soil pores critical for plant life?
they enable root penetration and aeration (oxygen absorption)
The water-state of a soil immediately after a big rain once the excess has drained away from the pore spaces is…
Field capacity
What components of soil are responsible for most of its cation exchange capacity?
Both clay minerals & organic matter
Humus, decomposing leaf litter, bacteria, fungi, small invertebrates, and plant roots are all forms of ___ in a soil.
Organic Matter
Insects trapped by Sarracenia pitcher plants are used by the plant for there…
Inorganic mineral nutrients
