The objective of this study was to determine the effect of different sowing dates on pod yield and some agronomic characteristics of the ‘Virginia’-type peanut cultivar ‘Halisbey’, and to determine the optimal sowing date in the Mediterranean region. This study was conducted in 2018 and 2019 at the Experimental Research Farm of Agricultural Faculty, Cukurova University in Adana, Turkey. The seeds were sown on seven dates: March 28, April 8, April 18, April 28, May 8, May 18 and May 28 each year. The experiment included a randomized complete block design with three replications. The plants were harvested 160 days after sowing, starting on September 8 every year. Pod number and pod weight per plant, 100 seeds weight, shelling percentage, oil and protein content, pod and kernel yield per hectare were investigated. As a result, pod number and weight per plant, 100 seeds weight, shelling percentage, pods and kernel yield values were found to be the highest at the experimental variant with May 8 sowing date. While the oil content decreased by delaying the sowing date, the protein content was increased. According to a two-year average, the highest pod yield (8136 kg ha-1) and kernel yield (5711 kg ha-1) were also obtained at the experimental variant with May 8 sowing date.

– This study was conducted at the Cukurova University research farm in winter season between January and June in Cukurova Region (Adana-Turkey) in 2018. The objective of this study was to determinate the tuber yield and some agronomic characteristics of potato breeding lines and varieties grown in winter season. The experimental design was a Randomized Complete Block Design with three replications. The twenty one potato breeding lines and varieties (table and processing types) such as Agata, Agria, Alegria, Austin 2T, Doruk, Hermes, Maraton, Kutup, L.Olimpia, Laura, Markies, Nahita, Sante, Soraya, Testa 3T, Macar-140211, Macar-140607, Macar-140717, MEÇ-140209, MEÇ-140717 and Zirve were used as a plant material in this research. Tuber yield and tuber number per hill, marketable tuber percentage, tuber yield per hectare and dry matter content were investigated in this research. The tuber yield of the breeding lines and varieties varied between 12840-37930 kg ha -1 per hectare. The dry matter content of the research materials varied between 13.75% and 22.67%.

Aim : Soybean is a strategic crop plant grown to obtain edible oil and forage. Oil content and fatty acid composition of oilseeds are important consideration for breeding programs. This study was conducted to determinate fatty acid compositions of some soybean varieties grown in both main and double cropping system at the University of Cukurova, Turkey in 2013 and 2014 growing seasons. Methodology : The experiment was designed in a Randomized Complete Block with three replications. Soybean varieties Atakisi, Arisoy, Cinsoy, Adasoy, Ilksoy, Turksoy, Ataem-7, Sa 88, S 4240, Blaze and Nova (maturity group III and IV) were used as a plant material. Oil content and fatty acid (palmitic, stearic, oleic, linoleic and linolenic acids) compositions of soybean varieties were investigated. Results : According to a two-year average, the fatty acid composition of soybean varieties ranged from 10.59-12.09% for palmitic acid, 3.11-4.52% for stearic acid, 27.02-34.09% for oleic acid, 44.51-51.80% for linoleic, and 4.44-5.61% for linolenic acid in main cropped soybean. In double cropped soybean, the fatty acid composition (two-year average) of the tested varieties ranged from 10.76-12.23% for palmitic acid, 3.94-4.87% for stearic acid, 22.69-29.51% for oleic acid, 48.40-54.14% for linoleic and 5.41-6.62% for linolenic, respectively. Interpretation : The oil and oleic acid content was found higher in main cropped than double cropped growing season, but the linoleic acid content was higher in double cropped than in main cropped growing seasons.

This study was conducted as a main crop in University of Cukurova, Faculty of Agriculture Field Crops Department in 2016. The objective of this research was to determine some agronomic and quality characteristics of peanut breeding lines. In this study, 22 peanut lines (F6) belonging to Brantley (High oleic) x Halisbey (High yield) crossing were used as a plant material. The experimental design was a Randomized Complete Block with three replications. Pod number and pod weight per plant, 100-seed weight, shelling percentage, oil and protein content, saturated (Palmitic, stearic, arachidic and lignoceric acid) and unsaturated (Oleic, linoleic and linolenic acid) fatty acids percentage and pod yield per hectare values of lines were investigated. As a result, the pod number per plant of breeding lines was between 24.9-34.9 pod plant-1, pod weight was 73.3-91.2 g plant-1, 100-seed weight 118.0-148.6 g, shelling percentage was 59.5-66.9% and pod yield was 6064-9232 kg ha-1. The oil content and oleic acid percentage of breeding lines were varied between 41.20-55.95% and 51.97-80.00%, respectively.

This research was conducted as a main crop in University of Cukurova, Faculty of Agriculture Field Crops Department in 2016 and 2017 growing seasons. The objective of this study was to determine the effect of high air and soil temperature on pod yield and some yield component of peanut (Arachis hypogaea L.) breeding lines in main crop growing season in Mediterranean region in Turkey. In this study, 22 peanut lines (F6 and F7) belonging to Brantley x Halisbey crossing and NC-7 variety (st) were used as a plant material. The experimental design was a Randomized Complete Block with three replications. The main yield component such as pod number, pod weight, 100-seed weight, and pod yield per hectare values of lines were investigated. The maximum air temperature data was recorded day by day during the growing period in both years and average daily maximum air temperatures were higher in 2017 than in 2016. When the pod yield compared in 2016 and 2017, it is found that the pod yield was lower (21.5%) in 2017 than in 2016. The high air and soil temperature was negatively affected the pod yield of peanut breeding lines. It was found that the breeding lines differ in their sensitivity to high temperatures.

This study was conducted at the experimental area of the Department of Field Crops, Faculty of Agriculture, Cukurova University as a main crop in 2015. The objective of this study was to determinate the effect of harvesting dates on oil and fatty acid composition of peanut ( Arachis hypogaea L.) varieties grown in main cropped condition in Cukurova region. The experimental design was a split plot with three replications. The Halisbey, Sultan, Arioglu-2003, Osmaniye-2005, NC-7, Batem-5025, Flower 22, Flower-32, Flower-36, Brantley and Wilson peanut varieties (Virginia market type) were used as a plant material in this research. The plants were harvested at 149, 156, 163 and 170 days after sowing (DAS). Oil and fatty acids (palmitic acid, stearic acid, oleic acid, linoleic acid, linolenic acid, arachidic acid, behenic acid and lignoceric acid) content and Oleic acid to Linoleic acid ratio (O/L) of peanut varieties were investigated. As a result, the oil percentage of peanut varieties was increased from 47.8% to 50.3% when the harvesting delayed from 149 DAS to 170 DAS. While the palmitic and linoleic acid percentage was decreasing, the stearic and oleic acid percentage was increased when the harvesting delayed from 149 DAS to 170 DAS in peanut varieties. The others fatty acids were not affected by the harvesting time. 47.9% and 69.0%. The differences between the year and long term for the climatic data were not significant (Anonymous, 2015). The experiment was designed at split plot design (harvesting times as main plots and varieties as subplots) and replicated three times. The experimental site was cultivated deeply by the moldboard following the harvest of the previous crop in the autumn and then the soil was prepared by using disked-harrowed the day of planting. 250 kg ha -1 of Di-ammonium phosphate (45 kg ha -1 N, 115 kg ha -1 P 2 O 5 ) fertilizer was applied and incorporated to soil before planting. Ammonium nitrate (33%N) at the rates of 200 kg ha -1 was applied two times; before first (beginning of flowering) and second (pod formation) irrigation. Plots consisted of 4 rows 5.0 m long and 70 cm apart. The seeds were sown in line manually by hand on 5 April 2015 and with 70 x 15 cm distance. During the growing period, recommended pesticides and fungicides were applied to control insects and diseases. During the growing period, other standard cultural practices were done. The plants were harvested by hand at four different times with one week intervals (149 DAS, 156 DAS, 163 DAS and 170 DAS) at the beginning of September. tended to give peanut oil with higher stearic and oleic acid and less linoleic acid. Knauft et al. (1988) pointed out that digging delays tended to give peanut oil with higher stearic and oleic acid and less linoleic acid. Bovi (1982) Raheja et al. (1987) and Önemli (2012) reported that there was a negative correlation between oleic acid and linoleic acid. These results are in agreement with the findings of Young et al. (1972), Young and Worthington (1974), Bovi (1982), Raheja et al. (1987), Knauft et al. (1986), Hinds (1995), Dwivedi et al. (1996), Andersen and Gorbet (2002), Isleib et al. (2008), Önemli (2012), Chowdhury et al. (2015) and Gulluoglu et al. (2016a).

This study was conducted at the Cukurova University research farm as a main crop in 2013 and 2014 in Adana, Turkey. The objective of this study was to determine the effect of twin row planting pattern and plant densities on yield and yield components of peanut. The experimental design was a Randomized Complete Block Design with three replications. Halisbey (Virginia type) variety was used as a plant material in this research. The planting pattern was used as twin-row and conventional single-row. The row spacing was 70 x 25 x 70 cm, 75 x 25 x 75 cm and 80 x 25 x 80 cm for twin-row planting pattern and 70 cm for single-row pattern. Intra-row spacing of 10, 15 and 20 cm was arranged for different plants population. According to a two-year average, the highest pods yield (7833.6 kg ha(-1)) was obtained from 70 x 25 x 70 x 10 cm (21.05 plants m(-1)) twin-row planting pattern while the yield was 6688.8 kg ha(-1) in single-row planting pattern as 70 x 15 cm (9.43 plants m(-1)). The yield increase was 17.86% in 70x25x70x10, 16.70% in 75x25x75x10 and 15.79% in 80x25x80x10 twin-row pattern, compared with traditional single-row planting pattern.

Plant density is an essential agronomic practice and affects the productivity of crops.Hence, the optimum plant density to achieve the maximum productivity may vary from crop to crop, genotype to genotype and location to location.Therefore, the current research has been carried out for two consecutive seasons of 2013 and 2014 at the research station of Cukurova University and, the aim of the study was to determine the effect of plant density on seed yield and some agronomical traits in main cropped soybean production.Results of study revealed that seed yield of soybean depends on plant density and highest seed yield (5820.8 kg ha -1 ) was obtained from the 70 cm x 4 cm spacing, while the lowest mean values (3804.5 kg ha -1 ) was obtained from 70 cm x 10 cm spacing.Based on these results, it can be concluded that the maximum seed yield of soybean could be possible with the optimum planting pattern 70 cm x 4 cm or 70 cm x 5 cm for medium early (maturity group 3) varieties in main cropped soybean farming in Adana, Turkey.

This study was conducted at the Experimental Area of Cukurova University in 2015 and 2016 as a double crop growing season. The objective of this study was to determine the effect of high temperature on seed yield and some yield component of soybean [Glycine max (L.) Merr] varieties in double crop growing season in Mediterranean region in Turkey. The experimental design was a Randomized Complete Block with three replications. The Arisoy, Atakisi, Ataem-7, Umut-2002, Turksoy, Adasoy, Cinsoy, Ilksoy, Bravo, Sa-88, S.4240, Blaze, Nova, May-5312, Cetinbey, May-5414 and 34A7 varieties (belonging to maturity groups II, III, IV and V) were used as a plant material in this research. The maximum air temperature data was recorded day by day during the growing period in both years and daily maximum air temperatures were higher in 2016 than in 2015. When the seed yield compared in 2015 and 2016, it is found that the seed yield was lower (29.5%) in 2016 than in 2015. The high temperature was negatively affected the seed yield of soybean varieties. It was found that the soybean varieties differ in their sensitivity to high temperatures.

This study was conducted at the University of Cukurova, Faculty of Agriculture in 2013 and 2014 as a main and double crop growing season. The objective of this study was to compare of agronomic and quality characteristics of some peanut (Arachis hypogaea L.) varieties grown as a main and double crop. The experimental design was a Randomized Complete Block (RCBD) with three replications. The Halisbey, Sultan, Osmaniye-2005, Arioglu-2003, Batem-5025, NC-7, Flower-22, Flower-32, Flower-36, Brantley, Wilson (Virginia market type), Florispan (Spanish market type), Georgia Green (Runner market type) and Spantex (Valencia market type) varieties were used as a plant material in this research. Pod number and pod weight per plant, 100 seed weight, shelling percentage, oil and protein content, pod and kernel yield per hectare values of varieties were compared. The average pod number, pod weight per plant, fancy pod percentage, protein and oil percentage, pod and kernel yield values of peanut varieties were higher in main crop than in double crop, whereas 100 seed weight and shelling percentage were higher in double crop than in main crop growing season. According to a two-year average, the pod yield per hectare of peanut varieties varied between 3366-8796 kg ha(-1) and 3621-7094 kg ha(-1) main and double crop growing season, respectively. The average pod yield of peanut varieties were 6177 kg ha(-1) in main cropped, it was decreased to 5456 kg ha(-1) in double crop growing season. The highest pod yield was obtained from Sultan and Osmaniye-2005 varieties in both growing seasons.

This study was conducted at the Experimental area of Cukurova University in 2013 and 2014 as a main and double crop growing seasons. The objective of this study was to determine the effect of growing seasons on some agronomic and quality characteristics of soybean (Glycine max Merr.) varieties in Mediterranean Region in Turkey. The experimental design was a Randomized Complete Block with three replications. The Arisoy, Atakisi, Ataem-7, Umut-2002, Turksoy, Adasoy, Cinsoy, Ilksoy, Sa-88, S.4240, Blaze and Nova varieties were used as a plant material in this research. The investigated characteristics such as plant height, pod and branch number per plant, the lowest pod height, 1000-seed weight, oil percentage and oil yield values of soybean varieties were higher in main crop than in double crop, whereas the protein percentage values was higher in double crop. The average seed yield of soybean varieties were 4616 kg ha-1 in main crop and it was decreased to 4164 kg ha-1 in double crop growing season. The average seed yield was higher in main crop than in double crop. According to a two-year average, the seed yield per hectare of soybean varieties was varied between 4323-5377 kg ha-1 in main crop and 3194-4667 kg ha-1 in double crop growing season, and the highest seed yield was obtained from Atakisi and Arisoy varieties in both growing seasons.

This study was conducted at the Cukurova University research farm as a double crop in 2013 and 2014 in Adana, Turkey.The objective of this study was to determine the effect of row distance and plant density on yield and yield components of peanut(Arachis hypogaea L.) grown as a double crop.The experimental design was a split plot design with three replications.The Halisbey (Virginia type) variety was used as a plant material in this research.The row spacing was arranged 70 and 75 cm, and intra-row spacing of 5,10,15,20 and 25 cm was arranged for different plants population.According to a two-year average, the highest pods weight (97.57g plant -1 and 94.83 g plant -1 ) and pod number (96.4 pods plant -1 and 93.5 pods plant -1 ) per plant was obtained from 70 x 25 cm and 75 x 25 cm planting density, respectively.Pod number and pod weight per plant was increased when the plant density was decreased.Pod yield per hectare was increased when the plant density was increased.The highest pod yield (7511.9 kg ha -1 ) was obtained from 75x10 cm and the lowest (5171 kg ha -1 ) from 75x25 planting density according to a two-year average.As a result; optimum planting density was found 75x10 cm for Virginia market type varieties in double crop peanut production.

This study was conducted at the experimental area of the Department of Field Crops, Faculty of Agriculture, Cukurova University as a main crop in 2013 and 2014. The objective of this study was to determinate the effect of harvesting dates on yield and some agronomic traits, seed and oil quality of peanut (Arachis hypogea L.) grown in the Mediterranean region. The experimental design was a Randomized Complete Block Design with three replications. The Halisbey peanut variety (Virginia market type) was used as a plant material in this research. Pod yield per hectare, shelling percentage, 100-seed weight, protein and oil percentage, fatty acids (palmitic, stearic, oleic and linoleic acids) composition and oil quality (oleic acid to linoleic acid ratio, iodine value) traits were investigated. According to a two-year average, the highest pod weight (84.24 g plant-1 ) and pod number (36.83 no. plant-1 ) per plant was obtained when the plants were harvested at 180 days after planting (DAP). The shelling percentage and 100-seed weight increased when the harvesting was delayed. The highest pod (8002.6 kg ha-1 ) was obtained when the plants were harvested at 180 DAP. The oil and protein percentage ranged from 48.66-49.66% and 24.65-25.89% respectively. The oleic and linoleic acid content varied between 51.54-54.94% and 24.65-26.78%, respectively. Oleic acid to linoleic acid ratio (O/L) increased when the harvesting time was delayed.

Cukurova Universitesi Ziraat Fakultesi Tarla Bitkileri bolumu arastirma ve uygulama alaninda tesaduf bloklari deneme desenine gore 3 tekerrurlu olarak 2013 ve 2014 yillari ikinci urun yetistirme sezonunda yurutulen bu calismada, Cukurova bolgesi ikinci urun kosullarinda bazi yerfistigi cesitlerinin verim ve bazi tarimsal ozellikleri belirlenmeye calisilmistir. Arastirmada; Halisbey, Sultan, Osmaniye-2005, Brantley, Georgia Green, Wilson, NC-7, Runner, Flower-22, Flower-31 ve Flower-36 gibi yerfistigi cesitleri materyal olarak kullanilmistir. Arastirma sonuclarina gore meyve verimi 394 ile 725 kg/da arasinda degismis olup, en yuksek meyve verimi Osmaniye-2005 cesidinden elde edilmistir. En dusuk meyve verimi ise Florispan (394 kg/da) cesidinden elde edilmistir. Yerfistigi cesitlerinin yag icerikleri % 43,5 ile % 50,5 arasinda degismis olup en yuksek yag icerigi Georgia Green cesidinden ve en dusuk yag icerigi ise Flower-22 cesidinden elde edilmistir. Ic orani degerleri % 59.6 ile % 76.6 arasinda olup en dusuk deger Sultan cesidine, en yuksek deger ise Georgia Green cesidine aittir. 100 tohum agirligi yonunden ise en dusuk deger Florispan (57.7 gr/100 tohum) cesidinden, en yuksek deger ise Osmaniye-2005 (140 gr/100 tohum) cesidinden elde edilmistir.

Bu calisma; ana urun kosullarinda yetistirilen bazi yerfistigi cesitlerinin onemli agronomik ve kalite ozelliklerini belirlemek amaciyla yapilmistir. Arastirmaya konu olan denemeler 2013 ve 2014 yillarinda, C.U Ziraat Fakultesi, Tarla Bitkileri Bolumune ait arastirma alaninda kurulmus ve yurutulmustur. Denemede; Halisbey, Sultan, NC-7, Osmaniye 2005, Batem-5025, Florispan, Brantley, Wilson, Georgia Green, Ha-runner, Flower 22 (C-1), Flower 32 (C-2) ve Flower 36 (C-3) gibi farkli meyve ve tohum ozelligine sahip cesitler materyal olarak kullanilmistir. Denemeler tesaduf bloklari deneme desenine gore uc tekrarlamali olarak kurulmustur. Ekimler Nisan ayinin ilk yarisinda, hasatlar ise Ekim ayinin ilk haftasinda yapilmistir. Denemeye alinan cesitlere ait; bitki basina meyve sayisi, bitki basina meyve agirligi, meyvelerde kalite siniflamasi, 100 meyve agirligi, 100 tohum agirligi, ic orani, yag orani, ham yag verimi, protein orani ve dekara verim gibi onemli agronomik ve kalite ozellikleri incelenmistir. Iki yillik sonuclara gore denemeye alinan yerfistigi cesitlerinin kabuklu meyve verimi degerleri 366 -879 kg/da arasinda degisim gostermistir.  Dekara en yuksek verim Sultan (879 kg/da) ve Halisbey (779 kg/da) cesitlerinden elde edilmistir. Denemeye alinan yerfistigi cesitlerinin yag orani %47-51 arasinda, protein oranlari ise %24-28 arasinda degisim gostermistir.

This study was conducted at the experimental area of Department of Field Crops, Faculty of Agriculture, Cukurova University in 2013 and 2014. The objective of this study was to determine the influence of planting pattern and plant population on seed yield and yield components of soybean at late double-cropped (after 15th of July) planting in Cukurova region, Turkey. The experimental design was a Randomized Complete Block Design with three replications. The Atakisi (maturity group III) variety was used as a plant material in this research. The planting pattern was used as twin-row and conventional single-row. The row spacing was 70 x 25 x 70 cm, 75 x 25 x 75 cm and 80 x 25 x 80 cm for twin-row and 70 cm for single-row pattern. Intra-row spacing of 3, 4, 5 and 6 cm was arranged for different plants population. In this research, the plant populations varied between 31.6 and 69.9 plants m-2. According to a two-year average, the highest seed yield (4906 kg ha-1) was obtained from 80 x 25 x 80 x 3 cm (63.2 plants m-1) twin-row planting pattern while the yield was 3940 kg ha-1 in single-row planting pattern as 70 x 4 cm (35.7 plants m-1). The yield increase was 24.5% more than conventional single-row planting pattern (standard). Key words: Double-cropped, Plant population, Planting pattern, Soybean, Twin-row

İkinci ürün koşullarında yetiştirilen bazı soya çeşitlerinin önemli agronomik ve kalite özelliklerini belirlemek amacıyla yapılan bu çalışmada, farklı olgunlaşma gurubuna giren 14 farklı soya çeşidi (Nova, May 53-12, İlksoy, Arısoy, Atakişi, Atem-7, Umut-2002, Cinsoy, Sa.88, S.4240, Türksoy, Adasoy, Blaze ve Ha.16-21) materyal olarak kullanılmıştır. Araştırmaya konu olan denemeler 2013 ve 2014 yıllarında, Ç.Ü. Ziraat Fakültesi, Tarla Bitkileri Bölümüne ait araştırma alanında kurulmuş ve yürütülmüştür. Denemeler tesadüf blokları deneme desenine göre üç tekrarlamalı olarak kurulmuştur. Denemeye alınan çeşitlerin; bitki boyu, ilk bakla yüksekliği, bakla sayısı, dal sayısı, 100 tohum ağırlığı, yağ oranı, protein oranı ve tohum verimi gibi önemli agronomik ve kalite özellikleri incelenmiştir. İki yıllık sonuçlara göre denemeye alınan soya çeşitlerinin tohum verimi değerleri 321-463 kg/da arasında değişim göstermiştir. Dekara tohum verimi bakımından ilk sırayı; Arısoy (466.7 kg/da) ve Atakiş (466.2 kg/da) çeşitleri almıştır. İki yıllık ortalama değerlere göre; çeşitlerin yağ oranları %17.11-19.37, protein oranları ise %36.52-38.46 arasında değişim göstermiştir.