Phosphorus

Question 1

There are _ nutrients essential for plant growth and crop production

Answer 1

17

Question 2

Micronutrients include (bcc)

Answer 2

Boron

Chloride

Copper

Question 3

Molybdenum, zinc, nickel are _ nutrients

Answer 3

Micro

Question 4

Carbon, hydrogen, oxygen are obtained from (2)

Answer 4

Air

Water

Question 5

Phosphorous is essential for plants to

Answer 5

Harvest suns energy and convert it into growth and reproduction

Question 6

Without an adequate supply of P, plant growth is

Answer 6

Diminished

Question 7

Without an adequate supply of P, plant maturity is

Answer 7

Delayed

Question 8

Without an adequate supply of P, yields are

Answer 8

Reduced

Question 9

Phosphorus is returned to soil when

Answer 9

Plants die

Question 10

When P is returned to soil, it can be used by (2)

Answer 10

Soil microorganisms

Other plants

Question 11

P cycle continues until it becomes fixed in

Answer 11

Sedimentary rocks at the bottom of the sea

Question 12

P is released from sedimentary rocks at the bottom of the sea when

Answer 12

Rock surfaces and is weathered

Question 13

Nutrient uptake by crops depends on

Answer 13

Nutrient supply in soil

Question 14

Nutrient uptake by crops depends on root _ area

Answer 14

Surface

Question 15

Nutrient uptake by crops depends on root _

Answer 15

Activity

Question 16

Roots are able to absorb only nutrients that

Answer 16

Come into contact with living or active cells

Question 17

P uptake is dependent on

Answer 17

Condition of plant’s root system

Question 18

Nutrients contact root system by three mechanisms (3)

Answer 18

Diffusion

Mass flow/bulk flow

Root interception

Question 19

Diffusion is the

Answer 19

Movement of molecules through the soil

Question 20

(Diffusion) _ determines how long it takes for nutrients to reach the roots (2)

Answer 20

Size of particles

Moisture levels

Question 21

_ provide a more direct path to the roots surface (2) (diffusion)

Answer 21

Higher water content

Smaller soil particle size