Cortés and Pizarro are associated with the conquest of great American Indian empires. the exploration of North American territory. the establishment of Spanish missions.

crop rotation kepy different plants in the soil instead of once constintly. when switching out plants you have different nutrients being absorbed at different speeds and different roots growing differently therfore the spoil and water flow have to adapt and carry fresh nutrients to carry the constant changes that were going on in the soil.

in the 1950s, country music came into its own before rock-n-roll took off in the 60s while jazz and classical music continued to innovate