以下为句子列表：
英文: However for P supply, DAP was found superior source and rock phosphate tended to be equally effective source of P in acid laterite soil.
中文: 不过对于磷素供应来说，磷酸二铵是最好的来源，磷矿粉在酸性红壤土上同样有效。
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英文: We make superphosphate by reacting rock phosphate with sulphuric acid.
中文: 我们使磷酸盐岩同硫酸发生化学反应制造过磷酸钙。
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