Understanding Cation Exchange Capacity: Key to Soil Fertility and
Sustainability
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Cation exchange capacity (CEC) is a fundamental property of soils and
natural materials, determining their ability to hold and exchange
positively charged ...
Monday, March 07, 2016
Plovdiv ancient city
It was founded by Philip II of Macedon, the father of Alexander the Great. Plovdiv is in modern day Bulgaria. The city has many Roman ruins.
The ubiquitous Thracians settled Plovdiv around 5000 BC. Their fortress, at Nebet Tepe in the old town, was called Eumolpias. Philip II of Macedon extended the settlement, humbly naming it Philipopolis in342 BC.
In the earliest centuries AD the Romans installed their administration in the city and the Peninsula. They built a very hard fortress and included in it 3 of the city hills.
The most impressive of Roman ruins is an amphitheater that once seated 3,000 spectators until Attila the Hun (406-453) rode through and destroyed a portion of it.
The proto-Bulgar Krum seizied it in 815 and renamed ir Pupulden, making it an important strategic outpost of the First Bulgarian Empire (681-1018).
In 14th century the Turks captured the city and it grew into an administrative and military center.
Plovdiv ancient city
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