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Articles by Mehmet Arslan
Total Records ( 8 ) for Mehmet Arslan
  Bihter Zaimoglu , H.Halis Arioglu and Mehmet Arslan
  A two-year field study was conducted to determine the effects of different seed quality on plant stand and seed yield. Mixing dead seeds ranging from 5 to 50% into high quality seeds, eleven different seed qualities were created. The study was planted in the experimental field of Cukurova University on a silt loam soil in a Randomized Complete Block Design with three replications. Dead seed rate had significant affect on the number of plant per hectare. The highest plant population was obtained from no dead seed added treatment and the lowest was obtained from 50% dead seed added treatment in both years. Pod number and seed number per plant increased with the decreasing number of plant per hectare. Seed yield was positively correlated with seed quality and number of plant per hectare. The highest seed yields were obtained from 10% dead seed added treatments with the plant densities of 128900 and 127864 ha-1 in 2003 and 2003, respectively. Seed yield increased with the increasing plant density upto a maximum level and declined when plant density was increased further. Results showed that use of high quality certified seeds are required to obtain adequate plant number per unit area for maximum yield. It is recommended that certified seed must be used to reduce the risk of stand establishment failure to ensure full seed yield.
  Sevgi Caliskan , Mehmet Arslan , Halis Arioglu and Necmi Isler
  The effects of planting method (row and broadcast) and plant population (102 000, 127 500, 170 000, 255 000 and 510 000 plants ha-1) on yield and yield components of sesame were studied under irrigated conditions in the East Mediterranean region of Turkey during 2002 and 2003. Seed yield and yield components of sesame were significantly affected by planting methods. The row planting had positive effects on yield and yield components and produced around 34% higher seed yield comparing to broadcast planting in both years. The population density also significantly affected to all growth and yield parameters. Plant height, branch number, capsule number, capsule length, seed number per capsule, seed weight, seed yield and protein content decreased with the increasing plant population in both years, except for seed yield, harvest index and oil content. The highest seed yield was obtained from 510 000 plants ha-1 in 2002 and 2003 with 1633 and 1783 kg ha-1, respectively.
  Mehmet Arslan , Ilhan Uremis and Ahmet Uludag
  Maintaining weed-free period longer than required for optimum seed yield increases cost of crop production. A two-year study was conducted to determine the critical weed-free period for double-cropped soybean to obtain maximum seed yield. The experimental design was Randomized Complete Blocks with three replications. Seed yield varied between 1289.3 and 4778.3 kg ha-1 in 2002 and between 1007.3 and 3980.0 kg ha-1 in 2003. The highest and the lowest seed yield were obtained from weed-free and weedy control treatments, respectively in both years. Seed yield exponentially increased with the increasing weed-free period in 2002 and 2003. Seed yield increase in increased period of weed-free plots was resulted from increased pod and seed number/plant. The result of present study showed that double-cropped soybean must be kept weed-free from emergence till physiological maturity to obtain maximum seed yield.
  Ilhan Uremis , Mehmet Arslan and Ahmet Uludag
  The objectives of this study were to determine the effects of weed infestation on seed yield and yield components of double-cropped soybean and to determine critical time of weed removal after emerging that double-cropped soybean can tolerate before yields are reduced. Eleven weed duration periods were created by removing weeds by weekly intervals after emergence. Plants grown in different weed duration plots were examined and compared with weedy and weed-free controls. The experimental design was Randomized Complete Blocks with three replications. Plants grown in weedy control plots had taller plant heights than weed-free control and the other weedy plots. Branch number, node number, pod number and seed number per plant decreased when the duration of weed infestation increased. Maximum soybean seed yield was obtained when plots were kept weed-free, followed by weedy 1 Week After Emerging (WAE). In weedy control plots, seed yield was reduced. The result of present study showed that 1-week delay in removing of weeds significantly reduces seed yield in double-cropped soybean.
  Leyla Gulluoglu , Halis Arioglu and Mehmet Arslan
  This study was carried out to determine the effects of four Plant Growth Regulators (PGRs) (Atonik, GA3, Cytozyme Crop Extra and Megahix), two nutrient complexes (Biomaster and Kinetic) and a see weed extract (Maxicrop) on pod-shattering rate and yield loss of both main and double-cropped soybean grown in a prolonged hot and dry condition in 2002 and 2003. The soybean cultivar was A 3935. The experimental design was randomized complete block with four replications. Application of PGRs remarkably lowered the shattering rates and seed yield losses only for main-cropped soybean. The lowest shattering rates and yield losses were obtained from Atonik and Cytozyme applications until 10 days after R8 growth stage for main-cropped soybean. The positive effects of PGRs on shattering rate and yield losses were decreased with the increasing delay of harvest. The results of the current study showed that seed yield losses of main-cropped soybean could be alleviated by the application of Atonik, Megahix and Cytozyme. However application of PGRs was not suggested for double-cropped soybean if the scope was to reduce yield losses caused by pod shattering.
  Filiz Ayanoglu , Mehmet Arslan and Avni Hatay
  This study was conducted to determine the best harvesting stage, harvesting hours and drying method of lemon balm grown at two sites with different altitudes to obtain the highest essential oil yield. The experimental design was an Randomized Complete Block Design in a split-split plot arrangement with four replications comparing three harvesting stages (before flowering, at flowering and after flowering), three harvesting hours (6 am, 12 and 7 pm) and three drying methods (sun drying, shadow drying and fresh leaves). Essential oil content was between 0.064 and 0.073% in the lemon balm grown in Sinanli and it varied from 0.08-0.14% the lemon balm grown in Batiayaz. Essential oil content was affected from harvesting stages, harvesting hours and drying methods in both locations. When the harvesting stages were in consideration, the highest oil content was obtained before flowering in Sinanli, whereas the highest oil content was obtained after flowering in Batiayaz. The most suitable harvesting hours were in the morning (6 am) in Sinanli and in the evening (7 pm) in Batiayaz. The highest oil content was obtained from shadow drying in both locations. β-caryophllene and germacrene-d were the major volatiles, whereas, neral and geranial, the important essential oil components of lemon balm, were found in low quantities, while the other important component citronellal was not detected in the lemon balm grown in both locations.
  Leyla Gulluoglu , Halis Arioglu and Mehmet Arslan
  A two-year study was conducted to determine the effects of some Plant Growth Regulators (PGRs) and nutrient complexes on biomass weight, seed yield and yield components of both main and double cropped soybean grown under hot and dry conditions. The experimental design was Randomized Complete Block with four replications. Atonik, Biomaster, GA3, Kinetic, Maxicrop, Cytozyme and Megahix were used as plant growth regulators. The soybean cultivar was A3935 (MG III). Application of PGRs had different effects on biomass weight, seed yield and yield components of both main and double cropped soybean. The highest biomass weight (1054.0 g-2) was obtained from Maxicrop and the lowest (891.8 g-2) was obtained from Megahix applied plots in main cropped soybean. Under double crop conditions, however, the highest biomass weight (857.6 g-2) was obtained from Cytozyme and the lowest (780.0 g-2) was obtained from control. Application of PGRs increased the seed yield and yield components of soybean under both main and double cropped conditions. The highest seed yield was obtained from Atonik with 3876 kg ha-1 for main crop soybean and 47 kg ha-1 for double cropped soybean. The lowest seed yields were obtained from no chemical applied control plots of both main and double cropped soybean with 3386 and 838 kg ha-1, respectively. Application of Atonik, Cytozyme and Maxicrop could be suggested to alleviate heat stress and increase seed yield of both main and double cropped soybean grown under hot and dry conditions.
  Ilhan Uremis , Mehmet Arslan and Ahmet Uludag
  The objective of the current study was to determine the allelopathic potential of six Brassica species widely cultivated in Turkey which are round white radish (Raphanus sativus L.), garden radish (Raphanus sativus L.), black radish (Raphanus sativus L. var. niger), little radish (Raphanus sativus L. var. radicula), turnip (Brassica campestris L. ssp. rapa) and rapeseed (Brassica napus L. ssp. oleifera DC.) cultivar Westar on the germination and seedling growth of cutleaf ground-cherry using shoot powder extracts. Allelopathic effects of shoot powder extracts of six Brassica species at various concentrations (2, 4 and 8%) on cutleaf ground-cherry (Physalis angulata L.) were investigated under laboratory conditions. There were differences among Brassica species for allelopathic inhibition of cutleaf ground-cherry seed germination and seedling growth. Shoot powder extracts of Brassica species exhibited marked differences in the inhibition of cutleaf ground-cherry seed germination. Inhibition on seedling growth was not as much as inhibition on germination. The inhibitory effects of shoot powder extracts on cutleaf ground-cherry seed germination and seedling growth increased as their concentrations increased. These results imply that Brassica species have great potential for cutleaf ground-cherry control. However, more research is needed under field conditions to investigate allelopathic potential and practical applications.
 
 
 
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