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Öğe Effect of farmyard manure and mineral fertilization on growth and yield of early potato (Solanum tuberosum) under the Mediterranean conditions in Turkey(Indian Soc Agronomy, 2004) Caliskan, ME; Kilic, S; Gunel, E; Mert, MA field experiment was conducted during the winter and spring months of 2000 and 2001 at Hatay, Turkey (36degrees 39. N, 36degrees 40' E), to study the effects of farmyard manure (0, 10, 20, 30, 40 and 50 tonnes/ha) and mineral fertilization (no or 200-90-90 kg/ha N-P-K respectively) on growth and yield of early potato (Solanum tuberosum L.) crop. Mineral fertilization significantly increased values of morphological traits and tuber yield, while it had negative effect on dry matter content of tuber. The application of farmyard manure also had positive effects on growth and yield with or without mineral fertilization. The farmyard manure also increased the efficiency of mineral fertilization. Tuber yield increased as the farmyard manure levels increased under non-mineral fertilized conditions while no significant increase obtained from 40 and 50 tonnes manure/ha rates in mineral-fertilized plots. Aplication of farmyard manure significantly increased the dry-matter content of tuber and this was more evident in mineral fertilized plots.Öğe Effect of sowing dates on phenological development, yield and oil content of sunflower (Helianthus annuus) in a Mediterranean-type environment(Indian Soc Agronomy, 2002) Caliskan, ME; Gungel, E; Cagar, A; Mert, MThe effect of sowing time on phenological development, seed yield and oil content of sunflower (Helianthus annuus L.) was studied under the restricted irrigation conditions in Hatay, Turkey (36degrees 39' N, 36degrees 40' E) in 1998 and 1999. Sunflower cultivars ('C 207' and 'Istranca') were sown at 2-week intervals from 1 March to 15 July, with 2 supplemental irrigations. Delaying in sowing shortened the period for emergence, head initiation, and total duration. Seed yield increased until 1 April and then decreased greatly with further delay in sowing both cultivars. The higher oil contents were also recorded with earlier-sown sunflower crop.Öğe Genotypic and phenotypic relationships of lint yield, fibre properties and seed content in a cross of two cotton genotypes(Taylor & Francis As, 2005) Mert, M; Akiscan, Y; Gençer, O[Abstract Not Available]Öğe Inheritance of resistance to Verticillium wilt (Verticillium dahliae) in cotton (Gossypium hirsutum L.)(Blackwell Verlag Gmbh, 2005) Mert, M; Kurt, S; Gencer, O; Akiscan, Y; Boyaci, K; Tok, FMVerticillium wilt, caused by Verticillium dahliae Kleb., is a major constraint to cotton production in almost all countries where cotton is cultivated. Developing new cotton cultivars resistant to Verticillium wilt is the most effective and feasible way to combat the problem. Little is known about the inheritance of resistance to Verticillium wilt of cotton, especially that caused by the defoliating (D) and nondefoliating (ND) pathotypes of the soil-borne fungus V. dahliae. The objective of this study was to determine the inheritance of resistance in cotton against both pathotypes of V. dahliae. Crosses were made between the susceptible parent 'Cukurova 1518' and each of four resistant parents PAUM 401, PAUM 403, PAUM 405 and PAUM 406 to produce F-2 generations in 2002 and F-2:3 families in 2003. Disease responses of parent and progeny populations to the D and ND pathotypes were scored based on a scale of 0-4 (0, resistant; 4, susceptible). F-2 populations inoculated with the D pathotype showed a 3 : 1 (resistant : susceptible) plant segregation ratio. Tests of F-2:3 families confirmed that resistance was controlled by a single dominant gene. In contrast, analysis of data from F-2- and F-2-derived F-3 families suggested that resistance to the ND pathotype is controlled by dominant alleles at two loci.Öğe Irrigation of cotton cultivars improves seed cotton yield, yield components and fibre properties in the Hatay region, Turkey(Taylor & Francis As, 2005) Mert, MWater stress limits cotton ( Gossypium hirsutum L.) growth and development. Physiological and morphological differences among cultivars influence the impact of water stress on yield and fibre quality. This response is important for selecting the best cultivars for irrigated and non-irrigated conditions. The objective of this research was to investigate the effects of water stress on six cotton cultivars under irrigated and non-irrigated conditions on a clay soil in Hatay, the Eastern Mediterranean region of Turkey during the 2001 and 2002 cotton growing seasons. Seed cotton yield and the other yield related traits varied significantly among cultivars under non-irrigated conditions. Mid-early (Stoneville 453 and Deltapine 5690) and mid-late (Maras 92 and GW Teks) cultivars were more affected by water stress than early cultivars ( Deltapine 20 and Nazilli 143). Growing cotton under non-irrigated conditions resulted in the production of shorter and weaker fibre with reduced micronaire. The fibre properties of cultivars were inconsistently affected by non-irrigated and irrigated conditions throughout two years, indicating variability inherent in cotton fibre.Öğe Response of cotton (Gossypium hirsutum L.) to different tillage systems and intra-row spacing(Elsevier Science Bv, 2006) Mert, M; Aslan, E; Akiscan, Y; Çaliskan, METhe earliness is of great importance to cotton production in Mediterranean-type environments due to detrimental effects of autumn rainfall on lint quality. However, farmers commonly avoid early sowing due to risks of cold soil temperature and waterlogging after sowing in spring. Ridge-tillage system is one approach to increase soil temperature and mitigate adverse effects of waterlogging. The ridge-tillage system is also advantageous in reducing inputs in tillage operations. However, a limited experimental data are available about the effects of ridge-tillage system on earliness of harvesting, lint yield and quality of cotton in the Mediterranean-type environments. Thus, the objective of this study was to determine how ridge-tillage (RT)planting system and intra-row spacing affect cotton lint yield, earliness and fiber quality compared with conventional tillage (CT)-planting system. Field experiments were conducted on a clay soil (Vertisol) in Hatay province (36 degrees 39N-36 degrees 40'E, 83 in a.s.l.) in the Eastern Mediterranean Region of Turkey during 2000 and 2001. The experiment was laid out as a split-plot with three replications with tillage systems as main plots and intra-row spacings (13, 17, 21 and 25 cm) as subplots. The effects of tillage systems on lint yield and earliness were inconsistent among years. The RT-planting system resulted in 13.5% higher lint yield and 14.5% more earliness in 2001 when abundant rainfall occurred after sowing, while significant effects of tillage systems were not observed in 2000. The intra-row spacings significantly affected lint yield and earliness in both years. The earliness increased with closer spacing, while the highest lint yield was obtained from 17 cm intra-row spacing in both years. However, the fiber quality parameters were not significantly affected by tillage systems, intra-row spacings and tillage system x spacing interaction in both years. Finally, the results suggest that RT-planting system with 17 cm intra-row spacing can be used in cotton production instead of CT-planting system in the Eastern Mediterranean Region of Turkey. Ridging in 17 cm intra-row spacing also seems to be suitable to mechanical harvesting. (C) 2005 Elsevier B.V. All rights reserved.
