CAPE Biology Unit 2 · 2011 · Paper 1 · Question Q4
The yield of greenhouse crops is higher than that of field crops, due to increased photosynthetic activity by the plants. Which of the following factors may contribute to this? I. Constant application of farmyard manure II. Rotation of plants III. Humid air and moist soil conditions IV. Higher than average carbon dioxide levels
- (A)I and II only
- (B)I and III only
- (C)II and IV only
- (D)III and IV only
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