Lecture 10 - Plant Mineral Nutrient

Question 1

essential element

Answer 1

an element needed for the completion of life cycle that is needed to perform necessary physiological functions

Question 2

_____% of plant dry mass is composed of C, O, and H

Answer 2

93

Question 3

mineral nutrients

Answer 3

elements obtained mainly from the soil

Question 4

what are the main nutrients contained in fertilizers

Answer 4

nitrogen (N), phosphorus (P), and potassium (K)

Question 5

aspects to consider to determine amount of fertilizer needed

Answer 5

type of plant, soil characteristics, cultivation practices, developmental stage, financial, interactions between nutrients, and abiotic/biotic factors

Question 6

soil characteristics that could affect how much fertilizer should be used

Answer 6

1) residual nutrients
2) rate of nutrient leaching
3) pH
4) soil particle size
5) presence of microbes

Question 7

primary macronutrients

Answer 7

N,P,K

Question 8

secondary macronutrients

Answer 8

Mg, S, Ca

Question 9

law of the minimum

Answer 9

most limiting resource determines the yield

Question 10

very mobile nutrients

Answer 10

N, P, K, Mg

Question 11

where do deficiency symptoms appear first with very mobile nutrients

Answer 11

older leaves, then it spreads

Question 12

moderately mobile nutrients

Answer 12

S, Cu, Fe, Mn, Mo, Zn

Question 13

where do deficiency symptoms appear first with moderately mobile nutrients

Answer 13

seen over entire plant

Question 14

immobile nutrients

Answer 14

B, Ca

Question 15

plants assimilate mineral nutrients mainly as _____ or ______

Answer 15

cations or anions

Question 16

hoagland nutrient solution

Answer 16

use the highest possible concentrations of nutrients without producing toxicity symptoms to promote rapid plant growth

Question 17

critical concentration of nutrients

Answer 17

the concentration of nutrients that produces max growth without any waste/extra

Question 18

what is the optimal pH range for most plants

Answer 18

5.5<pH<7.0

Question 19

cation exchange capacity

Answer 19

degree to which a soil can absorb and exchange ions

Question 19

why is pH important

Answer 19

it affects nutrient availability, soil microbes, and root growth

Question 20

what does a higher cation exchange capacity mean

Answer 20

more potential for minerals in the soil

Question 21

how does a soil particle take up nutrients

Answer 21

cations bind to negatively charged soil particles

Question 22

how do plants get nutrients from soil

Answer 22

they secrete H+ to exchange with bound cations

Question 23

Micronutrients

Answer 23

Fe, Cl, B, Mn, Na, Zn, Cu, Ni, Mo