lecture 24 - plants and soil Flashcards
1
Q
why are essential elements important?
A
- needed for completion of life cycle
- part of any molecule / constituent of plant
- absence leads to deficiency symptoms
2
Q
by analyzing dry matter of plants we can determine:
A
- composition
- concentration
3
Q
many ions accumulate inside cells at …
A
higher concentrations than soil
4
Q
examples of plants that contain large amounts of specific elements:
A
- mustard family contain large amounts of sulfur and use it in synthesis of oils
- horsetails accumulate silicon in cell wall
5
Q
what are the functions of essential elements, in plants?
A
- structural
- enzymatic
- regulatory
- ionic
6
Q
soil is …
A
- inorganic material containing minerals and weathering of rocks
- organic materials containing bacteria, fungi, algae, lichens, and bryophytes, as well as plants/animals, and decomposition returning organic material to soil
7
Q
what consists of approx. 50% of soil volume?
A
air and water - proportion determined by moisture levels
