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    Effect of various nitrogeneous fertilizers on yield, quality and leaf nutrient contents of sugar beet (Beta vulgaris L. 'Kawemaja') [De?işik azotlu gübrelerin şeker pancarinda (Beta vulgaris L.' Kawemaja) verim, kalite ve yaprakta bazi besin elementleri kapsamina etkisi]
    (1996) Gezgin S.; Bayrakli F.; Polat H.; Özaytekin H.; Uyanöz Ş.; Zengin M.
    The effects of various nitrogeneous fertilizers; ammonium sulphate (AS), ammonium nitrate (AN) and urea, on yield, quality and some nutrient contents of leaf blades and petioles of sugar beet were investigated in the field under Konya ecological conditions. A twenty kg N/da as AS, AN and urea increased root and refined sugar yields in the following order : ammonium nitrate (AN)> ammonium sulphate (AS)> urea. The effects of AS and urea, and AS and AN were found statistically similar. On the other hand, the root and refined sugar yield with nitrogeneous fertilizers were found higher than that of control. The differences between fertilizer treatments and control (except urea for root yield) were statistically significant (p<0.05). The highest sugar, refined sugar, amino- N and root K contents were obtained with AS while AN treatment caused the highest Na content of root. Although sugar and refined sugar contents were higher with AS and urea, and lower with AN treatment compared to control, these differences were not statistically significant. Generally the N, P, K, Fe and Zn contents of leaf blades and petioles in August (about 3 months later than planting) and at harvest (early October) were found relatively higher with AS than those of AN and urea treatments. In comparison to control, only AN and urea increased leaf yield statistically significant (p<0.05).
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    Micronutrient contents in leaves of poppy cultivars grown with different boron doses
    (2011) Öztürk Ö.; Günlü H.; Gezgin S.
    Poppy (Papaver somniferum L.) requires greater quantities of boron for its metabolic needs than other cultivated species. This study was undertaken to evaluate the effects of five boron doses of 0, 1, 3, 9 and 36 kg B ha-1 (as spray of boric acid, H3BO3) in a B-rich calcareous soil (2.84 B mg kg-1) on micronutrient contents in leaves of four poppy cultivars during 2002-2003 growing season. Boron (B), iron (Fe), manganese (Mn), zinc (Zn) and copper (Cu) concentrations were measured in poppy leaves at the stage of flowering. The B concentration in the leaves was highly correlated with boron doses, i.e., the leaf B content increased in accordance with increasing B doses applied to the soil. Fe, Mn, Cu and Zn concentrations in the leaves were not changed by the different B levels, however, leaf Fe, Mn, B and Cu concentrations varied with the cultivars. Among the cultivars, Ankara 94 had the highest Mn (96.71 mg kg-1), Karahisar 96 had the highest Cu (6.21 mg kg-1), Kocatepe 96 had the highest B (73.20 mg kg-1) and Afyon Kalesi 95 had the highest Fe (127.37 mg kg-1) concentrations.
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    Micronutrient contents in leaves of sunflower cultivars grown with different boron doses
    (2010) Öztürk Ö.; Ceyhan E.; Önder M.; Harmankaya M.; Hamurcu M.; Gezgin S.
    Although boron is essential for crop growth, the amount required differs among plant species. Sunflower (Helianthus annuus L.) requires greater quantities of boron to satisfy its metabolic needs than other cultivated species. The present work was undertaken to evaluate what effects five boron doses of O, 2.5, 5.0, 7.5 and 10.0 kg B ha -1 (applied as a spray of boric acid, H 3BO 3) would have on micronutrient contents In leaves of four sunflower cultivars grown in B-deficient calcareous soils (0.19 B mg kg -1 ) during the 2001 growing season. Boron (B), iron (Fe), manganese (Mn), zinc (Zn) and copper (Cu) concentrations were measured in sunflower leaves at the flowering stage. According to the results, the B concentration in the leaves was highly correlated with boron doses, that is, the leaf B content increased in accordance with increasing B doses applied to the soil. Fe, Mn, Cu, and Zn concentrations in the leaves were not changed by the different B levels. However, leaf Mn, B and Cu concentrations varied with the cultivars. Among the cultivars, TR-4098 had the highest Mn (90.74 mg kg -1) and Cu contents (45.95 mg kg -1), while AS-615 had the highest B (83.52 mg kg -1) and Fe (202.55 mg kg -1) concentrations.