Question

question 10 (1 point)
what is a direct consequence of using water contaminated with pesticides for irrigation?
o a reduced erosion
o b harm to crops, soil organisms, and wildlife
o c cleaner crops
o d improved taste in food

question 11 (1 point)
which irrigation system delivers water directly to plant roots?
o a rainfed agriculture
o b drip irrigation
o c surface irrigation
o d sprinkler irrigation

question 12 (1 point)
which of the following is not a source of irrigation water?
o a groundwater
o b recycled water
o c surface water
o d seawater

Explanation:

• Question 10: Pesticides in irrigation water can be toxic. They can harm crops (by affecting their growth and metabolism), soil organisms (such as beneficial bacteria and earthworms that help with soil fertility and aeration), and wildlife (if they consume contaminated plants or water). Reduced erosion is not related to pesticide - contaminated water. Cleaner crops and improved taste in food are the opposite of what would happen with pesticide - contaminated irrigation.
• Question 11: Drip irrigation is designed to deliver water slowly and directly to the plant roots. Rainfed agriculture relies on rainfall, not an irrigation system. Surface irrigation floods the field, and sprinkler irrigation sprays water over the plants, not directly to the roots.
• Question 12: Seawater has a high salt content. Using it for irrigation would cause osmotic stress to plants (water would move out of plant cells due to the high salt concentration outside), leading to plant damage. Groundwater, recycled water, and surface water are commonly used as irrigation sources.

Answer:

• Question 10: B. Harm to crops, soil organisms, and wildlife
• Question 11: B. Drip irrigation
• Question 12: D. Seawater