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    Effects of application boron on yields, yield component and oil content of sunflower in boron-deficient calcareous soils
    (ACADEMIC JOURNALS, 2008) Ceyhan, Ercan; Onder, Mustafa; Ozturk, Ozden; Harmankaya, Mustafa; Hamurcu, Mehmet; Gezgin, Sait
    The study was conducted to investigate the effects of five boron ( B) doses; 0, 2.5, 5.0, 7.5 and 10.0 kg B ha(-1) in B-deficient calcareous soils on yield and some yield components of four sunflower genotypes. Genotypes have shown variations with respect to their responses to B applications. AS-615 and Coban had the highest seed yield (3.75 and 3.23 t ha(-1), respectively) at 7.5 kg B ha(-1), whereas S-288 and TR-4098 yielded 4.17 and 3.28 t ha(-1), respectively, at 0 kg B ha(-1). Therefore, S-288 and TR-4098 can be indicator genotypes for B toxicity. The other genotypes appeared to have high sensitivity to B deficiency. For AS-615 and Coban, application at 7.5 kg B ha(-1) level was found to be sufficient for adequate grain yield, whereas further B levels might have detrimental effects on grain yield.
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    Response of common bean (Phaseolus vulgaris L.) cultivars to foliar and soil applied boron in boron-deficient calcareous soils
    (ACADEMIC JOURNALS, 2008) Harmankaya, Mustafa; Onder, Mustafa; Hamurcu, Mehmet; Ceyhan, Ercan; Gezgin, Sait
    Yield losses in common bean (Phaseolus vulgaris L.) may occur due to boron (B) deficiency when the susceptible cultivars are grown in calcareous boron deficient soils. The study was therefore aimed at investigating the effects of three B doses: control (0.0 kg ha(-1)), soil application (3.0 kg ha(-1)) and foliar fertilization (0.3 kg ha(-1)) on yield and some yield components of six common bean genotypes in the B deficient soil (with available 0.19 mg B kg(-1)). Plant height, pods per plant, seeds per pod, seed yield, protein content, 100-seed weight and B concentration in leaf were studied. Yield was obtained higher B applied genotypes than those of check. Applications both of soil and foliar B increased yield average of 10 and 20%, respectively. Genotypes had the highest seed yield when B was foliar applied indicating that soil factors affected available B. The highest seed yield was obtained from Karacasehir-90 with 4078.2 kg ha(-1). Yunus-90 was found to be B tolerant, while the other genotypes appeared to be highly B sensitive. The result showed that B deficiency in common bean might lead to significant yield losses and foliar application should be advised.