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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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    Investigating cadmium accumulation in wheat and barley cultivars from acidic soil of central Turkey
    (Agricultural Academy, Bulgaria, 2020) Tongarlak S.; Zengin M.; Mamedov A.
    Cadmium (Cd) excess in soil represents an important problem for cereal productivity and food-chain contamination. Limited information is available on the Cd concentration in the grain of cereals, grown in acidic soils of Turkey. The objective of the study was to investigate the response of the cereal cultivars (bread wheat, durum wheat and barley) to increasing rates of cadmium (Cd) application in acidic soil using the pot experiment. In the first stage (in 2006-2007), 10 cultivars of each crop were examined for grain Cd accumulation at two application rate of Cd salt (0 and 5 mg kg-1), and nine varieties were selected for their lowest, medium and highest level of grain Cd. In the second stage (in 2007-2008), Cd accumulation in the grain and stem of the selected nine crop varieties were studied at four-application rate of Cd salt (i.e., 0, 1, 3, 9 mg kg-1). Results showed that (i) crop, cultivar and Cd application rate and their interaction had significant (p < 0.05) effect on grain or stem Cd concentration, (ii) increasing rate of Cd applications linearly (proportionally) increased Cd concentration in the stem and grain of the crops, and (iii) durum wheat genotype accumulated 2-3 fold more Cd in the grain or stem than bread wheat or barley (i.e. durum wheat > bread wheat >barley). The differences between Cd concentrations of the crops, and their cultivars were mostly considerably at higher Cd application rates (3 and 9 mg kg-1). Grains of Ekiz (bread wheat), Meram-2002 (durum wheat) and Bulbul (barley) cultivars accumulated lowest amount of Cd. In all Cd treatments grains Cd concentration of the cultivars were higher (0.3-8.7 mg kg-1) than acceptable level. Cadmium proportional bioavailability to crops can be associated with the soil characteristics (e.g. moderate acid reaction, low clay and organic matter content) and Cd application rate. © 2020, Agricultural Academy, Bulgaria. All rights reserved.