Horticulture 1 Unit 6 Test

The three primary nutrients necessary for plant growth are:

• boron, calcium, iron

• chlorine, sulfur, zinc

• magnesium, manganese, molybdenum

• nitrogen, phosphorus, potassium

What is the function of nitrogen in plant growth?

• makes seeds

• produces a healthy green color

• produces a yellow color in leaves

• protects plants against winterkill.

An advantage of organic fertilizer is that it:

• improves the physical condition of the soil

• is sterile

• leaches quickly through the soil

• releases into the soil rapidly.

Sandy drills holes about 15" under her peach tree. She then puts granular fertilizer in the holes and backfills with soil. Which fertilization method is she using?

• banding

• foliar spraying

• perforating

• side-dressing

Angel selects a fertilizer that will promote good green growth for the leaves and stems of her houseplants. The fertilizer will most likely contain the primary element:

• chlorine

• copper

• nitrogen

• zinc

A common sympton of a plant that has phosphorus deficiency is:

• cupped or curled leaf tips

• a purplish color in older leaves

• rotting fruit on young plants

• yellow leaves with green veins

Which nutrient do plants need in the greatest quantity?

• calcium

• nitrogen

• sulfur

• zinc

If Nina fertilizes and irrigates her plants at the same time, which fertilization method is she using?

• banding

• broadcasting

• fertigation

• perforating

Which is the analysis of incomplete fertilizer?

• 5-10-10

• 10-10-10

• 15-0-14

• 20-10-20

Which group includes micronutrients?

• carbon, hydrogen, oxygen

• copper, manganese, zinc

• nitrogen, phosphorus, potassium

• sulfur, magnesium, water