Plant Nutrition: Essential Knowledge for Gardeners

Question 1

Which fertiliser application method involves applying nutrients directly to plant leaves?

Accepted Answer

Foliar feeding

Answer

Broadcasting

Answer

Side-dressing

Answer

Banding

Question 2

Nitrogen primarily contributes to which aspect of plant growth?

Accepted Answer

Leaf and stem growth

Answer

Root development

Answer

Fruit and seed production

Answer

Enhancing soil acidity

Question 3

Organic fertilisers are derived from:

Accepted Answer

Animal or plant materials

Answer

Chemical compounds

Answer

Liquid solutions

Answer

Granular formulations

Question 4

Which of the following is a slow-release fertiliser?

Accepted Answer

Osmocote

Answer

Urea

Answer

Ammonium nitrate

Answer

Liquid seaweed

Question 5

Which of these is NOT a macronutrient, needed in large amounts for plant growth?

Accepted Answer

Copper

Answer

Nitrogen

Answer

Phosphorus

Answer

Potassium

Question 6

Which fertiliser type provides immediate nutrient availability?

Accepted Answer

Liquid fertiliser

Answer

Organic fertiliser

Answer

Granular fertiliser

Answer

Slow-release fertiliser

Question 7

What is the purpose of using a foliar spray fertiliser?

Accepted Answer

To provide nutrients directly to plant leaves

Answer

To improve soil drainage

Answer

To control pests and diseases

Answer

To stimulate root growth

Question 8

Which of the following is **NOT** a primary macronutrient essential for plant growth?

Accepted Answer

Calcium

Answer

Nitrogen

Answer

Phosphorus

Answer

Potassium

Question 9

Which type of fertiliser gradually releases nutrients over time, providing sustained nourishment to plants?

Accepted Answer

Controlled-release fertiliser

Answer

Liquid fertiliser

Answer

Granular fertiliser

Answer

Foliar fertiliser

Question 10

Which of the following is a typical symptom of phosphorus deficiency in plants?

Accepted Answer

Purpling of leaf veins

Answer

Yellowing of older leaves

Answer

Stunted growth

Answer

Wilting

Question 11

Which method is commonly used to apply foliar fertilisers?

Accepted Answer

Sprinkling

Answer

Watering

Answer

Injecting

Answer

Broadcasting

Question 12

Which type of fertiliser is specifically formulated to promote optimal root growth and development?

Accepted Answer

Phosphorus-based fertiliser

Answer

Nitrogen-based fertiliser

Answer

Potassium-based fertiliser

Answer

Magnesium-based fertiliser

Question 13

What is the key ingredient found in organic fertilisers?

Accepted Answer

Composted plant material

Answer

Industrial chemicals

Answer

Inorganic mineral salts

Answer

Synthetic nitrogen compounds

Question 14

Which method of fertiliser application involves spreading it evenly over the soil surface?

Accepted Answer

Broadcasting

Answer

Banding

Answer

Foliar feeding

Answer

Injection

Question 15

Which of the following is a potential negative consequence of excessive fertiliser application?

Accepted Answer

Nutrient burn

Answer

Enhanced plant growth

Answer

Delayed flowering

Answer

Reduced susceptibility to pests

Question 16

What is the primary function of nitrogen in plant growth and development?

Accepted Answer

Supporting photosynthesis

Answer

Promoting root development

Answer

Enhancing fruit production

Answer

Increasing drought tolerance

Question 17

Which of the following factors has no influence on the rate at which fertilisers are released into the soil?

Accepted Answer

Plant variety

Answer

Soil temperature

Answer

Soil pH

Answer

Fertiliser particle size

Question 18

What is the main benefit of using slow-release fertilisers?

Accepted Answer

Releasing nutrients gradually over an extended period

Answer

Providing an immediate burst of nutrients

Answer

Preventing nutrient leaching

Answer

Improving soil structure

Question 19

What is the optimal soil pH range for most garden plants?

Accepted Answer

6.0-7.0

Answer

5.0-6.0

Answer

7.0-8.0

Answer

8.0-9.0

Question 20

What is the recommended application method for controlled-release fertilisers that gradually release nutrients over time?

Accepted Answer

Mixing into the soil

Answer

Sprinkling around the plant base

Answer

Dissolving in water and applying directly

Answer

Foliar feeding

Question 21

Which of the following symptoms is a common indicator of nitrogen deficiency in plants?

Accepted Answer

Yellowing leaves

Answer

Stunted growth

Answer

Brown leaf tips

Answer

Blossom-end rot

Question 22

When is the most suitable time to fertilise most garden plants to support their growth and health?

Accepted Answer

Early spring

Answer

Late summer

Answer

Autumn

Answer

Winter

Question 23

Which type of fertiliser comes in a concentrated liquid form that requires dilution in water before application?

Accepted Answer

Liquid

Answer

Granular

Answer

Organic

Answer

Slow-release

Question 24

Which macronutrient plays the primary role in plant growth and development?

Accepted Answer

Nitrogen

Answer

Phosphorus

Answer

Potassium

Question 25

Which of these is NOT a method of applying fertiliser?

Accepted Answer

Foliar spraying

Answer

Broadcasting

Answer

Banding

Question 26

Which of the following is NOT a type of inorganic fertiliser?

Accepted Answer

Compost

Answer

Ammonium nitrate

Answer

Potassium chloride

Question 27

What does the NPK ratio represent in fertilisers?

Accepted Answer

The percentage of nitrogen, phosphorus, and potassium

Answer

The acidity or alkalinity of the fertiliser

Answer

The shelf life of the fertiliser

Question 28

What is the primary advantage of using slow-release fertilisers?

Accepted Answer

Continuous nutrient supply over an extended period

Answer

Reduced risk of nutrient burn

Answer

Minimal leaching into groundwater

Question 29

Which of the following is NOT a potential negative impact of excessive fertiliser use on soil health?

Accepted Answer

Improving soil structure

Answer

Altering soil pH levels

Answer

Reducing soil biodiversity

Answer

Increasing soil salinity

Question 30

Which of the following is NOT a primary macronutrient essential for plant growth?

Accepted Answer

Calcium

Answer

Nitrogen

Answer

Phosphorus

Answer

Potassium

Question 31

Nitrogen-based fertilisers primarily promote the growth of which plant part?

Accepted Answer

Leaves

Answer

Roots

Answer

Flowers

Answer

Fruits

Question 32

Which method of application is best suited for liquid fertilisers?

Accepted Answer

Foliar spraying

Answer

Soil drenching

Answer

Granular application

Answer

Banding

Question 33

What is the optimal pH range for the majority of garden plants?

Accepted Answer

6.5-7.5

Answer

4.5-5.5

Answer

5.5-6.5

Answer

7.5-8.5

Question 34

Which of the following is an indicator of nitrogen deficiency in plants?

Accepted Answer

Yellowing of leaves

Answer

Stunted growth

Answer

Wilting

Answer

Blossom end rot

Question 35

How often should fertilisers be applied to most annual plants?

Accepted Answer

Every two weeks

Answer

Every week

Answer

Every month

Answer

Every season

Question 36

Within the context of plant growth, which of the following is considered a macronutrient?

Accepted Answer

Nitrogen

Answer

Calcium

Answer

Boron

Answer

Zinc

Question 37

Organic fertilisers are primarily derived from:

Accepted Answer

Animal manures

Answer

Synthetic chemicals

Answer

Mineral deposits

Answer

Fossil fuels

Question 38

Which method is commonly used to apply liquid fertilisers?

Accepted Answer

Foliar spraying

Answer

Root feeding

Answer

Banding

Answer

Broadcast spreading

Question 39

The N:P:K ratio in a fertiliser primarily indicates:

Accepted Answer

Proportion of nitrogen, phosphorus, and potassium

Answer

Acidity level

Answer

Micronutrient content

Answer

pH of the soil

Question 40

How often is it generally recommended to conduct a soil test?

Accepted Answer

Every 3-5 years

Answer

Annually

Answer

Only when fertilising a new lawn

Answer

Never

Question 41

What is the primary process by which fertilisers contribute to plant growth?

Accepted Answer

Nutrient uptake

Answer

Photosynthesis

Answer

Respiration

Answer

Transpiration

Question 42

Excessive fertiliser use can have potential environmental impacts. Which of the following is a primary concern?

Accepted Answer

Water pollution

Answer

Air pollution

Answer

Soil degradation

Answer

Reduced biodiversity

Question 43

Which of the following is NOT essential for plant growth?

Accepted Answer

Calcium

Answer

Hydrogen

Answer

Oxygen

Answer

Carbon

Question 44

What is the transfer of pollen from the anther to the stigma known as?

Accepted Answer

Pollination

Answer

Fertilisation

Answer

Germination

Question 45

Which type of fertiliser provides nutrients to plants over an extended period?

Accepted Answer

Slow-release fertiliser

Answer

Water-soluble fertiliser

Answer

Granular fertiliser

Answer

Organic fertiliser

Question 46

What is the primary benefit of using a soil test kit?

Accepted Answer

Determine soil nutrient levels

Answer

Measure soil moisture content

Answer

Identify soil pH

Answer

Detect soil-borne diseases

Question 47

What vital role does nitrogen play in plant growth?

Accepted Answer

Promotes leaf growth and chlorophyll production

Answer

Enhances root development

Answer

Improves water retention

Answer

Increases fruit production

Question 48

What is the scientific term for the union of male and female gametes in fertilisation?

Accepted Answer

Syngamy

Answer

Respiration

Answer

Pollination

Answer

Germination

Question 49

What common symptom indicates that a plant may need additional nutrients?

Accepted Answer

Yellowing leaves

Answer

Healthy flowers

Answer

Strong stems

Answer

Abundant fruit production

Question 50

How frequently is it recommended to fertilise established plants?

Accepted Answer

Every 4-6 weeks

Answer

Yearly

Answer

Monthly

Answer

Weekly