Fertilizers

1.

1 point

What is the primary symptom of iron chlorosis?

General yellowing of younger leaves with veins remaining green

General yellowing of younger leaves

General yellowing of older leaves with veins remaining green

General yellowing of all leaves with veins turning bronze

2.

1 point

Which plant care factor is NOT a contributor to iron chlorosis?

Springtime overwatering

Soil compaction and low soil oxygen

Maturity of the plant

Trunk girdling roots

3.

1 point

How can the pH of an alkaline soil high in calcium be lowers?

Cannot be lowered

Apply calcium

Apply sulfur

Apply lime

4.

1 point

On soils high in organic matter (4-5%), what is the routine nitrogen application rate for flower and vegetable gardens?

0

0.4 pounds nitrogen per 100 square feet

0.1 pounds nitrogen per 100 square feet

0.2 pounds nitrogen per 100 square feet

5.

1 point

What does a fertilizer formulation tell about the product?

Application rate

Ratio of nitrogen, phosphate and potash

Actual materials used in the product

Amount of nitrogen

6.

1 point

What is the analysis of a 10-10-10 fertilizer?

1:2:1

1:1:1

10-10-10

2-1-2

7.

1 point

What is the general symptom of nitrogen deficiency?

Yellowing of lower (older) leaves

Yellowing of leaves with green veins

Yellowing of upper (younger) leaves

Purplish leave color

8.

1 point

From the landscape environment, what is the major source of phosphate pollution of surface water?

Grass and leaves that get mowed or blown onto the street or hardscapes

Soil erosion from construction sites

Phosphate fertilizer being over-spread onto streets and sidewalks

Phosphate fertilizers being applied to lawns and gardens

9.

1 point

Which is a complete fertilizer?

20-20-0

34-0-0

15-0-15

5-5-5

10.

1 point

Which makes the best sample for a soil test?

A sample taken from an area in the yard where plant growth is poor.

Composite of five or more samples mixed together taken from various areas around the yard, including the lawn, the flower beds, the vegetable garden, and other different cropping areas.

Composite of five or more samples mixed together from one general area receiving the same soil treatment, like a vegetable garden.

A sample taken from an area in the yard where plant growth is good.

11.

1 point

In Colorado/Western soils, what is the routine need for phosphate and potash fertilizers?

Routinely used in that it promotes general plant growth even when not deficient

Routinely used in that it promotes rooting and flowering even when not deficient

Commonly deficient in most soils

Adequate in most soils

12.

1 point

Which simple test identifies soils prone to iron chlorosis?

Soil test for iron content

pH test

Soil test for high salts

Vinegar test for free lime

13.

1 point

Which best describes a bag of steer manure?

Manufactured fertilizer

USDA certified organic fertilizer

Organic fertilizer

Soil amendment

14.

1 point

What happens when phosphate fertilizer is applied to a garden or lawn soil?

Evaporates into the air

Leaches into ground water

Is chemically bound to the soil particles

Moves with surface rain into surface water

15.

1 point

In Western calcareous soils, what is the primary management tool for iron chlorosis?

Foliar applications of iron

Using iron fertilizers

Irrigation management

Lowering soil pH with sulfur

16.

1 point

If plant growth is limited by soil compaction, which fertilizer will improve plant growth?

Nitrogen

Potassium

Phosphate

None, correct soil compaction

17.

1 point

Which term refers to a product derived from natural sources (such as plant or animal by-products) that guarantees the minimum content of nitrogen, phosphate, and potash?

Organic fertilizer

Fertilizer

Certified organic fertilizer

Soil amendments

18.

1 point

When applying a complete fertilizer, what is the application rate based on?

Average of nitrogen, phosphate, and potash percentages in the fertilizer

Total nitrogen, phosphate, and potash percentages in the fertilizer

Nitrogen percentage in the fertilizer

The highest percentage of nitrogen, phosphate, or potash percentages

19.

1 point

Which type of problem will a routine soil test help diagnose?

Need for phosphate and potash fertilizer

Weed competition

Problems with soil compaction

Problems from over watering

Need for phosphate and potash fertilizer

Problems from over watering

Weed competition

Problems with soil compaction

20.

1 point

What is the ratio of a 34-0-0 fertilizer?

34-0-0

1:0:0

1:1:1

2:1:1