Exercise 6: Nutrient Management

Question 1

FATE OF NUTRIENT ELEMENTS IN SOIL

Answer 1

1. crop removal
2. run-off and erosion
3. fixation/immobilization
4. leaching
5. volatilization

Question 2

FERTILIZER GRADE

Answer 2

1. oxide basis
2. elemental basis

Question 3

FILLER

Answer 3

1. no fertilizer element
2. completes weight of mixed fertilizer

Question 4

ORGANIC FERTILIZERS FROM PLANTS AND ANIMALS

Answer 4

1. farm manure
2. crop residues
3. green manure

Question 5

ORGANIC FERTILIZERS FROM SYNTHETIC MATERIALS

Answer 5

1. urea
2. calcium cynamide

Question 6

CHARACTERISTICS OF NATURAL ORGANIC FERTILIZERS

Answer 6

1. low element content
2. slow availability
3. limited supply
4. promote good physical condition

Question 7

INORGANIC FERTILIZERS FROM MINERAL DEPOSITS

Answer 7

1. lime
2. potash
3. phosphate rock

Question 8

INDUSTRIALLY MANUFACTURED INORGANIC FERTILIZER

Answer 8

1. urea

Question 9

CHARACTERISTICS OF INORGANIC FERTILIZERS

Answer 9

1. high element content
2. readily soluble
3. fast nutrient release
4. undesirable physical condition
5. unlimited supply

Question 10

FERTILIZER CLASSIFICATION BASED ON NUMBER

Answer 10

1. single element
2. incomplete
3. complete

Question 11

FERTILIZER MANAGEMENT

Answer 11

1. nutrient requirement of crop
2. amount of nutrient that soil can supply