Research on the Effects of NPK (Chemical fertilizer) and Organic Fertilizers Used for Some Cotton Species (Gossypium hirsutum L.) Grown in Semi-arid Climate Conditions on Growing Crops, Growing Crop Elements and Sustainable Agriculture

Organic agriculture is a controlled and conditional system that protects the humankind, the environment and the whole ecosystem by preventing sentetic pesticides that cause serious illnesses and contaminate the soil, the air, the water and our food. In order to popularize organic agriculture this study was carried out by using ST-468 and BA-119 cotton varieties at NPK (Chemical fertilizer), Cattle manure, Pigeon manure, and control parcels at Ak？akale Vocational High School of Harran University of Organic Agriculture conditions in 2013 and 2014. It is found that according to used organic and chemical fertilizers, plant height varies between 105,46 cm (control) and 116,48 cm (pigeon manure); boll number per plant-1 varies between 19,10 (control) and 31,03 (NPK); average boll weight varies between 5,43 g (control) and 6,18 g (Cattle manure); average seed cotton boll weight varies between 4.33 g (control) and 4,82 g (Cattle manure); seed cotton yield varies between 3240,26 kg ha-1 (control) and 4420,45 kg ha-1 (NPK fertilizer); monopodial branch number varies between 3,51 (pigeon manure) per plant-1 and 4,16 per plant-1 (Cattle manure); number plant-1 boll number per plant-1 varies between 12.13 (control) and 15.12 (NPK); First sympodial branch node number varies between 6,96 (Cattle manure) and 9.60 (Pigeon manure) number plant-1 ginning ratio varies between 40,88% (control) and 42,99 % (pigeon manure); 100 seed weight varies between 9,93 g (control)and 10,41 g (NPK). It is confirmed that the use of organic and NPK (chemical fertilizers) has dramatic effects and statistical differences on plant height, boll number, boll weight and yield