Agriculture was the foundation of the Ancient Greek economy. Nearly 80% of the population was involved in this activity. Background Most Greek language agricultural texts are lost, except two botany texts by Theophrastus and a poem by Hesiod. The main texts are mostly from the Roman Agronomists: Cato the Elder's De agri cultura, Columella's De re rustica, Marcus Terentius Varro and Palladius. Varro mentions at least fifty Greek authors whose works are now lost. Attributed to Mago the Carthaginian, the agricultural treatise Rusticatio, originally written in Punic and later translated into Greek and Latin, is now lost. Scholars speculate whether this text may have been an early source for agricultural traditions in the Near East and Classical world. Ancient Greek agronomy was also influenced by Babylonian agriculture through the work of 4th century writer Vindonius Anatolius who influenced the 7th century writer Cassianus Bassus. Bassus' Eclogae de re rustica was excerpted in the Geoponika, a surviving Byzantine text created during the reign of Constantine VII Porphyrogenitus and later translated into Arabic, Syriac and Armenian. Agricultural products Farm During the early time of Greek history, as shown in the Odyssey, Greek agriculture - and diet - was based on cereals (sitos, though usually translated as wheat, could in fact designate any type of cereal grain). Even if the ancients were aware of the better nutritional value of wheat, the growing of barley was less demanding and more productive. Attempts have been made to calculate Attica grain production in the period, but results have not been conclusive. It did not take long for demand to outpace production capabilities, as arable land was limited. The "tightness" of the land ( / stenokhôría) also explains Greek colonization, and the importance Anatolian cleruchies would have for the Athenian empire in controlling grain provision. On the other hand, the Greek land was well suited for olive trees, which provided olive oil. The growing of olive trees dates back to early Greek history. Olive plantations are a long-term investment: it takes more than twenty years for the tree to provide fruit, and it only fruits every other year. Grapes also do well in the rocky soil, but demand a lot of care. Grapes have been grown since the Bronze Age. These core crops were augmented by vegetable gardens (cabbage, onion, garlic, lentils, chick pea, beans) and herb gardens (sage, mint, thyme, savory, oregano). Orchards included those of