The wheat cultivated surfaces, where no chemical fertilizers and treatments against pests and diseases were applied, keep extending in Greece and in many other countries. Five varieties were cultivated, two varieties of Triticum durum (Athos und Simeto) and three of Triticum aestivum vulgare (Gegora, Dio and Dropia), on three agrifonds (without manure, fertilized with 10 t/ha and fertilizer with 20t/ha manure). The average crop results for the three agrifonds obtained for the Greek varieties of Triticum aestivum vulgare - Gregora and Dio - were of between 4100 and 4200, of between 3400 and 3700 for the “durum” varieties Athos and Simeto and of more than 3700 kg/ha for the Dropia variety created in Fundulea. As an average for the five varieties studied we noticed that, by applying 10 t manure/ha, the yield increased with 32%. By doubling the manure doses, the yield increase was of 60%. The yield differences of 943 kg/ha, respectively of 1767 kg/ha, are very significant.

wheat; bio crop; varieties; manure

Presentation: oral