遵照伟大领袖毛主席“对于煤的综合利用问题,要好好的研究,这是今后发展的一个重要方向”的教导,北票县对煤碱石的成分和肥效进行了分析和试验。一、表层黑色煤碱粒,带有汽状的白色体,平均含氮千分之十一点二,水解性氮占含氮量的三分之一到三分之二。相当于大粪的含 Following the teachings of Chairman Mao, the great leader, “on the comprehensive utilization of coal, we must make a good study of it, which is an important direction for future development.” Beipiao County has analyzed and tested the composition and efficiency of coal-tar soot. First, the surface of black coal alkali particles, with a vapor-like white body, with an average of eleven thousandths of nitrogen, hydrolysable nitrogen accounts for one third to two-thirds of the nitrogen content. Equivalent to the dung containing