Discussion
For ameliorating acidic situations in lawns, lime should be applied at the rate of:
Answer: C
The key gives 200 to 300 g per square metre of lime to correct acidity in lawns. I could not confirm the figure from a source, so this rests on the key.
50-100 g is too little to correct acidity, and the larger rates, 550-850 g, are more than the key allows.
Lime raises the pH of acid soil. The key gives 200 to 300 g per square metre for lawns, and the rates of 550-850 g are above it.
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