Plant Nutrients

What are the 3 nutrients required on fertilizer labels?

• NDA

• NPK

• KPH

• CHN

Select all of the following that are macronutrients.

• calcium

• zinc

• copper

• sulfur

• magnesium

Which term signifies a positive ion?

• anion

• cation

• plus ion

• minus ion

Which term signifies a negative ion?

• Anion

• Cation

• Plus Ion

• Minus Ion

What does the term fertilizer grade refer to on a label?

• fertilizer percentage

• brand name

• net weight

• NPK numbers

If you have an acidic soil, what should you add if you want to raise the pH?

• sulfur or gypsum

• salt

• lime

• calcium

If you have an alkaline soil and want to lower the pH, what would you add?

• sulfur or gypsum

• salt

• lime

• calcium

What does the term acidic mean?

• pH of 7-14; low

• pH of 7-14; high

• pH of 0-7; low

• pH of 0-7; high

What does the term alkaline mean?

• pH 7-14; high

• pH 7-14; low

• pH 0-7; high

• pH 0-7; low

What is the pH of water?

• 0

• 5

• 7

• 14