Why is it important for horticulture students to understand NPK ratios?

Understanding NPK Ratios and Fertilizers

Interactive Video
•
Horticulture
•
9th - 12th Grade
•
Hard

Patricia Brown
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
To reduce water usage
To ensure proper nutrient supply
To improve plant aesthetics
To increase soil pH
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What does the 'P' in the NPK ratio represent?
Elemental phosphorus
Phosphorus pentoxide
Potassium
Potassium oxide
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a fertilizer with an NPK ratio of 33-10-5, what percentage of the product is nitrogen?
33%
5%
50%
10%
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How much phosphorus pentoxide is in a 40-pound bag with an NPK ratio of 33-10-5?
4 pounds
2 pounds
13.2 pounds
10 pounds
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the molecular weight of phosphorus pentoxide (P2O5)?
78 grams per mole
142 grams per mole
62 grams per mole
94 grams per mole
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What percentage of a P2O5 molecule is phosphorus?
44%
62%
83%
78%
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
In a 50-pound bag with an NPK ratio of 20-5-15, what is the percentage of filler?
40%
60%
20%
15%
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