A farmer applies calcium hydroxide to a field in order to reduce its acidity. If the farmer then puts ammonium nitrate fertiliser onto the same field straight after the calcium hydroxide, the two substances react. Why does this reaction reduce the effectiveness of the fertiliser?
- AIt makes ammonia gas, so less nitrogen is absorbed by the soil.
- BIt makes an acid, making the soil acidic again.
- CIt makes nitrogen gas, so less nitrogen is absorbed by the soil.
- DIt makes the fertiliser too strong, stopping the plants growing so well.