Nutrient Cycling and the Soil Food Web in Plant Growth

The video explains nutrient cycling, where plants use photosynthesis to create sugars and carbohydrates, but rely on soil nutrients for complete nutrition. Decomposed organic matter releases nutrients, which are absorbed by plants, continuing the cycle. The Soil Food Web, involving bacteria and fungi, enhances nutrient availability, reducing the need for fertilizers. This approach benefits farmers economically and environmentally by increasing yields and reducing pollution. For more information, visit soilfoodweb.com.

What do plants combine with sunlight during photosynthesis to produce sugars?

• Carbon dioxide

• Oxygen

• Water

• Nitrogen

What happens to organic matter when it falls to the soil surface?

• It evaporates

• It is decomposed by microorganisms

• It remains unchanged

• It is absorbed by plants

Which of the following is NOT a nutrient found in the parent material?

• Potassium

• Nitrogen

• Phosphorus

• Helium

How do plants control nutrient cycling in the root zone?

• By absorbing sunlight

• By releasing specific compounds into the soil

• By growing deeper roots

• By reducing photosynthesis

What is the role of predatory microorganisms in the Soil Food Web?

• They decompose organic matter

• They consume bacteria and fungi

• They produce sugars

• They absorb sunlight

What is a major benefit of the Soil Food Web for farmers?

• Reduced yields

• Higher costs

• Increased need for fertilizers

• Increased profits

What percentage of inorganic fertilizers is typically absorbed by crops?

• 80%

• 60%

• 40%

• 20%

What environmental issue is caused by the runoff of inorganic fertilizers?

• Desertification

• Soil erosion

• Algal blooms

• Deforestation

How does the Soil Food Web benefit the environment?

• By increasing fossil fuel use

• By reducing nutrient pollution

• By promoting deforestation

• By increasing water usage

What is a key advantage of restoring the Soil Food Web?

• Higher fossil fuel consumption

• Nutrient-rich food production

• Increased fertilizer dependency

• Decreased plant resilience