Final answer:
Two disadvantages of the ridge and furrow greenhouse are soil erosion and water loss.
Step-by-step explanation:
Two disadvantages of the ridge and furrow greenhouse are:
- Soil erosion: The grid system encourages farmers to plow their fields in straight lines, regardless of the topography of the fields. This practice can increase soil erosion.
- Water loss: The grid system can also lead to water loss as it does not consider the natural contour of the land.