Fertilizers & Nutrients

What macronutrient is present in the soil in an organic form and is broken down

by soil microbes and chemical reactions?

• Nitrogen

• Phosphorous

• Potassium

• Calcium

What macronutrient deficiency causes small, thin plants with purplish foliage,

sterile seeds and plants that are slow to mature?

• Calcium

• Phosphorous

• Potassium

• Magnesium

What macronutrient excess will delay flowering, cause stems to grow too long,

reduce quality of fruits, and lower resistance to disease?

• Nitrogen

• Phosphorous

• Potassium

• Calcium

What three nutrients are included in a complete fertilizer?

• Nitrogen, Potassium, Iron

• Nitrogen, Phosphorous, Potassium

• Phosphorous, Calcium, Iron

• Phosphorous, Potassium, Magnesium

What macronutrient is responsible for the strength of the plant?

• Nitrogen

• Calcium

• Potassium

• Magnesium

What macronutrient can decrease water requirements, increase disease resistance, reduce winterkill, and promote fruit color?

• Calcium

• Nitrogen

• Potassium

• Magnesium

You noticed plants have yellowing of the edges of the leaf, progressing toward the inside of the leaf. What primary macronutrient deficiency is the most likely cause?

• Nitrogen

• Potassium

• Phosphorous

• Magnesium

Leaves of the plants have become light green and growth appears stunted. What primary macronutrient deficiency is the most likely cause?

• Nitrogen

• Potassium

• Phosphorous

• Magnesium

What are the secondary Macronutrients?

• Calcium, Potassium, Iron

• Magnesium, Calcium, Iron

• Iron, Boron, Calcium

• Magnesium, Sulfur, Calcium

What secondary macronutrient deficiency will cause young leaves to turn light green and stalks to become long and slender?

• Sulfur

• Calcium

• Magnesium

• Potassium