4.4 Nutrients

Why is a monitoring system important for ensuring proper nutrition in greenhouse crops?

• To prevent nutrient deficiencies
• To optimize growth rate
• To maximize profitability
• To prevent nutrient toxicity

Which of the following is NOT an essential micronutrient for plant growth?

• Boron
• Iron
• Calcium
• Manganese

What is the main difference between macronutrients and micronutrients?

• Macronutrients are found in the soil, while micronutrients are found in the air.
• Macronutrients are organic, while micronutrients are inorganic.
• Macronutrients are essential in larger quantities, while micronutrients are essential in smaller quantities.
• Macronutrients are essential for plant growth, while micronutrients are not.

What are appropriate levels of nutrients for optimal plant growth?

• High levels of macronutrients and low levels of micronutrients
• Low levels of macronutrients and high levels of micronutrients
• Equal levels of macronutrients and micronutrients
• Varies depending on the type of plant

What are the essential nutrients for plant growth?

• Macronutrients
• Nonfertilizer nutrients
• Carbon, hydrogen, and oxygen
• Micronutrients

Which of the following is NOT an essential macronutrient for plant growth?

• Nitrogen
• Manganese
• Phosphorous
• Calcium

What role do pH and soluble salts play in nutrient availability for plants?

• They only affect macronutrient availability
• They only affect micronutrient availability
• They have no effect on nutrient availability
• They can slow or kill a greenhouse crop

How can you identify and address nutrient deficiencies in plants?

• Through analysis of growing medium
• Through visual diagnosis
• Through analysis of foliage
• All of the above

Why are micronutrients important for plant growth and what can happen with excessive amounts?

• Micronutrients are not important for plant growth
• Micronutrients are only important for certain types of plants
• Excessive amounts of micronutrients can lead to nutrient deficiencies
• Excessive amounts of micronutrients can lead to toxicity

How do the nutritional requirements of greenhouse plants differ from other agricultural crops?

• Greenhouse plants do not require any additional nutrients
• Greenhouse plants have lower nutritional requirements
• Greenhouse plants have the same nutritional requirements
• Greenhouse plants have higher supplemental nutritional requirements