The first agricultural revolution was in the 16th century. By abandoning the fallowing sytem, surplus crops happened. surplus crops created leisure time. Leisure time created men of science and industry. Von Liebig discovered that extracted phosphate of lime promoted plant growth in 1840.
french scientist Pierre Berthier discovered manufactured chemical fertilizers.
Phosphate rock is the product of land with abundant lifeforms being submerged by seawater. The largest deposits are in "French" Moroco.