from Science Daily
ScienceDaily (Nov. 12, 2012) — After emerging sometime before 1000 BC, the Maya rose to become the most advanced Pre-Columbian society in the Americas, thriving in jungle cities of tens of thousands of people, such as the one in Guatemala’s Tikal National Park. But after reaching its peak between 250 and 900 AD, the Maya civilization began to wane and exactly why has been an enduring mystery to scientists.
Writing in the Nov.-Dec. issue of theSoil Science of America Journal(SSSA-J), an interdisciplinary team led by Richard Terry, a Brigham Young University soil scientist, now describes its analysis of maize agriculture in the soils of Tikal . . . . Read Complete Report