Horticulture 1 Nutrients & Fertilizers

The three primary nutrients necessary for plant growth are:

• boron, calcium, and iron.
• chlorine, sulfur, and zinc.
• magnesium, manganese, and molybdenum.
• nitrogen, phosphorus, and potassium.

Which is true of macronutrients?

• All six are listed on the fertilizer label.
• They are present in the soil in the smallest amounts.
• They are used by the plants in large amounts.
• They are used by the plants in small amounts.

Which is the analysis of an incomplete fertilizer?

• 5-10-10
• 10-10-10
• 15-0-14
• 20-10-20

Soluble fertilizers dissolve in:

• air.
• ammonia.
• hydrogen.
• water.

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

• Banding
• Foliar spraying
• Perforating
• Side-dressing

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

• Banding
• Broadcasting
• Fertigation
• Perforating

Which nutrient do plants need in the greatest quantity?

• Calcium
• Nitrogen
• Sulfur
• Zinc

Sue uses a fertilizer that promotes early formation and growth of roots and increases the plant's hardiness and disease resistance vigor. Her fertilizer will most likely contain what primary element?

• Boron
• Chlorine
• Phosphorus
• Zinc

Which elements do plants need in the smallest amounts?

• Macronutrients
• Micronutrients
• Primary elements
• Secondary elements

An advantage of organic fertilizer is that it:

• improves the physical condition of soil.
• is sterile.
• leaches quickly through the soil.
• releases into the soil rapidly.