This study was performed to search and optimize “Organic nitrogen nutrition” of California Wonder peppers grown in greenhouses. The experiment has been carried out by “Organic growing procedures” during 2009 early spring greenhouse season in the Horticultural Department of the Çukurova University in Adana. The treatments were six different nitrogen doses originated from Pattrone trade name nitrogen source that contains 10.21 % organic N. Nitrogene doses used in the experiment were 0 kg, 5 kg, 10 kg, 15 kg, 20 kg, 25 kg for per 1000m2. Pepper cultivar used in the experiment was Flemonco F1 with red fruit colour in ripeness. Plant growth parameters, leaf nitrogen analyses, fruit pomologic analyses and yield have been investigated. At the competition of the experiment, fruit yields were 2.66, 2.78, 3.33, 4.34, 5.56 ve 5.41 kg/m2 respectively from the nitrogen doses 0 kg, 5 kg, 10 kg, 15 kg, 20 kg, 25 kg for per 1000 m2, respectively. Plant growth parameters and fruit pomologial analyses shown similar trends to the yield values in the application of the different nitrogen doses. As the conclusion, in order to grow organically California Wonder type red pepper in greenhouse in early spring growing period the optimal organic nitrogen dose was determined as 20 kg/1000m2.

This study was performed to search and optimize “Organic nitrogen nutrition” of California Wonder peppers grown in greenhouses. The experiment has been carried out by “Organic growing procedures” during 2009 early spring greenhouse season in the Horticultural Department of the Çukurova University in Adana. The treatments were six different nitrogen doses originated from Pattrone trade name nitrogen source that contains 10.21 % organic N. Nitrogene doses used in the experiment were 0 kg, 5 kg, 10 kg, 15 kg, 20 kg, 25 kg for per 1000m2. Pepper cultivar used in the experiment was Flemonco F1 with red fruit colour in ripeness. Plant growth parameters, leaf nitrogen analyses, fruit pomologic analyses and yield have been investigated. At the competition of the experiment, fruit yields were 2.66, 2.78, 3.33, 4.34, 5.56 ve 5.41 kg/m2 respectively from the nitrogen doses 0 kg, 5 kg, 10 kg, 15 kg, 20 kg, 25 kg for per 1000 m2, respectively. Plant growth parameters and fruit pomologial analyses shown similar trends to the yield values in the application of the different nitrogen doses. As the conclusion, in order to grow organically California Wonder type red pepper in greenhouse in early spring growing period the optimal organic nitrogen dose was determined as 20 kg/1000m