褐煤因其热值低,作为燃料效果不佳,但它含大量磷和钙,作为肥料不但能肥沃土壤,还能改善劣质土壤的结构。波兰的农业化学家1985年进行试验表明,把褐煤研碎后 Because of its low calorific value, lignite works poorly as a fuel, but it contains large amounts of phosphorus and calcium as fertilizers that not only fertilize the soil but also improve the structure of the poor soil. Polish agricultural chemists conducted experiments in 1985 to show that the lignite was crushed