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Estimation of Canopy Area of Fruit Trees Using Light Unmanned Aerial Vehicle (UAV) and Image Processing Methods Texte intégral
2020
Adil Koray Yıldız | Hakan Keles | Servet Aras
Some vegetative properties measured in fruit trees are important indicators in examining of plant growth calculation, estimation of leaf area index in evapotranspiration, fertilizer requirement etc. These measurements reflect the effects of the cultivation treatments in many areas of commercial growing and scientific studies. One of the most important measurements is the status of the canopy development. Canopy width, area and volume can be measured with some calculations. However, more technological equipment may be needed to reduce work and labor, and to make the results more precise and clearer. Recently, unmanned aerial vehicles, which have become widespread, have a wide potential for use in agriculture. By using image processing methods, it is possible to make more objective and high accuracy evaluations much faster. In this study, the images of the apple trees (Malus domestica Borkh) cultivar Golden grafted onto MM106 rootstock, were taken by light unmanned aerial vehicle to calculate the canopy area and then these images were analyzed using image processing methods for calculating canopy areas. Both circular and elliptical calculation methods were used. The area calculations with image processing methods were compared with the areas obtained manually. Comparisons were made by regression analysis. For the most successful method R value was 0.9662 for elliptic area and 0.9346 for circular area which was calculated by image processing. The results demonstrated that the image processing can be an alternative method to determine the canopy area according to accuracy ratios.
Afficher plus [+] Moins [-]Application of Principal Component Analysis for Gene Sequences (cDNA microarrays) Texte intégral
2020
Yalçın Tahtalı | Zeynel Cebeci
In this study, principal component analysis has been applied on data comprising of 6675 gene and 20 sequence collected by using cDNA microarray technology from livers of mice used in toxicology studies in certain time periods. Forming of gene groups from similar expression profiles and description of related genes which are implemented by similar component loads among the groups have been explained by using this cDNA technology. Besides that, interpretation and decomposition of factors (components) from correlation matrix which belongs to same data group have been explained. Some of the methods developed for minimizing the data set to fewer components which can explain the whole data structure have been evaluated. According to methods, if we assume that the first 9 eigen values are enough to describe the whole variance, then in this case, it is thought that it is good enough to describe the whole variance by using 9 eigen values with a variance loss of 20,79% instead of describing the whole variance by using 20 eigen values.
Afficher plus [+] Moins [-]Investigation of Grain Characters of Some Bean Varieties in Eastern Anatolian Conditions Texte intégral
2020
Leyla İdikut | Tolga Karabacak
In this study, it was aimed to investigate the quality characteristics of different dry beans (Önceler 98, Göynük 98, Yunus 90, Topçu, Aras 98, Alberto, Bermaz, Noyanbey 98, Akman 98, Göksün, Karacaşehir 98) cultivars. The research, which was planned to be 20 plants per square meter and 4 repetitions, was conducted in Eastern Anatolia (Elazig) between May and September in 2017. The grain number per plant, grain weight per the plant, 100 grain weight, protein, starch and oil ratios of bean varieties were examined. At the end of the study, the number of grains per plant, grain weight of plant, 100 grain weight, protein, starch and fat ratio of beans varieties was between 25.45-159.85 piece, 19.00-51.15 g, 21.18-49.62 g, 24.65-28.24%, 40.80-46.31% 1.02-1.77% respectively. The highest values were determined for protein ratio (%) on Noyan Bey 98 cultivar and for grain weight of plant, starch ratio, fat ratio (%) on Göynük 98 cultivar among bean varieties.
Afficher plus [+] Moins [-]Effects of Honey Sales Performed via Television Commercials on Consumers’ Buying Behavior Texte intégral
2020
Dilek Kabakcı | Soner Çankaya | Gökhan Akdeniz | Engin Derebaşı
Honey is the most known and consumed bee product by consumers. Therefore, from the past to the present, the investigation of the factors affecting the supply and consumption of honey has been on the agenda of the researchers. For this purpose, in our survey study, the effects of honey sales carried out via television channels (commercials) on consumers were investigated. According to the survey results, it was determined that 87.91% of consumers had a negative view about honey sales performed via television, 3.54% had a positive opinion, and 8.55% had no opinion on the issue. It was found that 5.83% of consumers bought honey through television commercials, and the education, income, gender and number of individuals in their households have an effect on the tendency to buy honey. Regarding the exposing of companies selling fake or adulterated honey by the Ministry of Agriculture and Forestry, results showed that this situation positively affected 54.53 of consumers in terms of trust in honey positively, affected 13.30% of consumers negatively, and did not affect 13.30% of consumers in any way. As a result, deceptive honey commercials lead to consumer abuse and create an environment of distrust of honey. In order to minimize speculation on honey, it is seen necessary to increase deterrent penalties for businesses that lead to unfair competition.
Afficher plus [+] Moins [-]Organic Grape Production and Producer Status in Adıyaman Province; Example of Besni District Texte intégral
2020
Aybüke Kaya | Songül Bay
This study was carried out to evaluate the socio-economic structure and organic farming activities of grape producers in Besni. A face-to-face survey was conducted with producers producing organic grapes. Data were obtained by interviewing a total of 50 producers. The number of organic products grown between 2005 and 2018 increased from 205 to 213 in Turkey. The number of producers engaged in cultivation in this area has increased more than 5 times compared to 2005. It reached nearly 80.000 in 2018. The area of organic vegetable production increased from 203.811 to 626.884 hectares in Turkey. While the production area increased 2.5 times, the production amount increased almost 4 times. Today, a variety of products in organic vegetable production, planting area, the number of farmers has increased in Turkey. The findings were obtained education level of the producers, the number of individuals in the family, record keeping, annual total income, newspaper reading, grape yield, grape cultivation area, property and rental land, credit usage, weed control, organic farming knowledge level, organic farming by using variables such as thoughts and grape variety. There are serious differences between conventional agriculture and organic farming. The family structure is effective in production activities. It has been determined that the thoughts of organic farming have changed depending on the age and experience of the producers. Organic grape producers have turned to organic farming due to their desire to sell their products at higher prices with state supports. Also, it has been suggested that organic farming is important in terms of the sustainability of living life all over the world. Increasing producer income and environmental awareness are among the main reasons for the transition to organic farming.
Afficher plus [+] Moins [-]How Do Foliar Application of Melatonin and L-Tryptophan Affect Lettuce Growth Parameters Under Salt Stress? Texte intégral
2020
Fatih Hancı | Gizem Tuncer
The aim of this study was to investigate the effects of exogenous Melatonin (100, 300 and 500 µM) and L-tryptophan (125, 250, 375 ppm) applications on some growth parameters of lettuce plants grown under salt stress. The study was carried out under semi-controlled greenhouse conditions in spring (March/April) season. The exogenous applications to lettuce plants were carried out two times as foliar spraying. Salt stress was generated by adding NaCl (0 mM, 100 mM, 200 mM) to irrigation water. The complete randomized design was used with three replications in this experiment. At the end of the study, it was found that the highest doses of exogenous applications had the highest effect on the parameters of the number of leaves, salinity necrosis, fresh leaf weight, fresh root weight, and total surface area of lettuce plants under 200 mM salinity condition. When the effects of the subtract on these values were compared, the effect of melatonin was found to be more pronounced. Leaf width, leaf length, and leaf surface temperature values were not affected by the external application. These values only changed depending on salt concentration. As a result of the study, it was concluded that the application of 500 µM melatonin significantly increased salt tolerance in lettuce plants. However, in order to reach a more general conclusion, the dose ranges and genotype/variety numbers should be increased.
Afficher plus [+] Moins [-]Determination of Salt Tolerance Levels of Some Radish Cultivars and Evaluation of the Effectiveness of Salicylic Acid on Germination in Saline Conditions Texte intégral
2020
Kamile Ulukapı | Ayşe Gül Nasırcılar | Zehra Kurt
This study was conducted to determine tolerance levels of different radish varieties (white, black, red, little red radish) under salt stress conditions and to evaluate the effectiveness of exogenous salicylic acid (SA) application on germination and vegetative development. For this purpose; germination percentage (%), germination time (day), germination index calculated, and then number of leaves, shoot length (cm), root length (cm), leaf width (cm), leaf length (cm), stem diameter (mm), plant fresh and dry weights (g) were measured. Radish seeds were germinated at control, 100 mM, 150 mM and 200 mM salt concentrations. Salt stress did not inhibit germination at a high level but negatively affected the vegetative growth of plants. According to the results of the statistical analysis of the data obtained, 150 mM was determined as the threshold value. Then, SA was applied to seeds treated with 150 mM salt concentration at different doses (0.25, 0.50, 0.75, 1.00 mM). SA had a positive effect on germination in saline conditions in general and it was concluded that 0.50 mM SA could be applied for germination percentages in all cultivars. However, 1 mM SA inhibited the germination of big red and little red radish cultivars, causing sudden and severe germination losses (10%, 8%, respectively). The effects of SA on vegetative growth parameters differed by cultivar and it was found to be inhibitory in terms of vegetative growth characteristics of white radish cultivar. On the other hand, 0.50 mM SA in black and big red, 0.75 mM SA in little red cultivar gave promoting results for vegetative growth.
Afficher plus [+] Moins [-]Screening and Selection of Media Components for Protease Production by Bacillus sp. EBTA6 Using Plackett–Burman Design Texte intégral
2020
Fikriye Alev Akçay | Ayşe Avcı
In this study, effects of medium components and inoculum size on the protease production by Bacillus sp. EBTA6 that was isolated from a home-made Tarhana sample were investigated. The cell-free supernatant of bacterium cultured on a shaking incubator for 24 h was used to test protease activity as the response. With a total number of 11 factors, 12 different experiments were run and the highest experimental protease activity was measured as 2280.4 U/mL. Results were analyzed statistically by ANOVA and the most efficient factors were detected as yeast extract, dipotassium phosphate, casein, and peptone with a contribution of 93.78, 2.19, 1.96, 1.31%, respectively. For validation of the selected factors, a further experiment was performed by using of yeast extract (9.98 g/L), dipotassium phosphate (1.27 g/L), casein (8.69 g/L), and peptone (9.88 g/L) obtained from the design equation. The experimental response was found as 2411.4 U/mL which was only 5.5% higher than the predicted response showing that the model was applicable.
Afficher plus [+] Moins [-]Systematic review: Effect of Irrigation Water Quality and Deficit Irrigation on Crop Yield and Water Use efficiency Texte intégral
2020
Lelisa Endalu Tura | Tasisa Temesgen Tolossa
The main purpose of this paper is to review on the effect of irrigation water quality and deficit irrigation on crop yield and water use efficiency. Low quality water for irrigation can impose a major environmental constraint to crop productivity. If salts become excessive, losses in yield will result. To prevent yield loss, salts in the soil must be controlled at a concentration below that which might affect yield. Irrigation application below the full evapotranspiration requirement is termed as deficit irrigation. Deficit irrigation consists of deliberately applying irrigation water in amounts below the plant’s water requirements. Deficit irrigation can be applied at certain periods during the crop’s growing season or throughout its growing season. Yield reductions also occur in a number of crops when subjected to water stress. Yield reductions depend on the crop’s sensitivity to water stress at its various growth stages. In order for deficit irrigation to be an economically viable practice, the revenue lost due to yield reduction should be lower than savings in total cost of production. The goal of deficit irrigation is to increase crop water use efficiency by reducing the amount of water that is applied or by reducing the number of irrigation events. The interaction effects of water quality and DI illustrated that when the two types of stresses; saline and DI were coupled together, a serious reduction occurred on total dry biomass and total yield. The interaction effects of water quality and deficit irrigation illustrated that when the two types of stresses; saline and deficit irrigation were coupled together, a serious reduction occurred on total dry biomass and total yields.
Afficher plus [+] Moins [-]Sitotoksik Analizlerin Su Kalitesi Değerlendirmeleri Üzerine Etkinliğinin Belirlenmesi Texte intégral
2020
Nuray Emin | Ekrem Mutlu | Ayşegül Emin Güzel
Tarafımızdan yürütülen çalışmalarda in vitro kültürlerde mezankimal kök hücreleri ve endotelyal hücre hatları kullanılarak suyun IC50 değeri tespit edilerek hücreler üzerindeki pozitif ve negatif etki dozları belirlenmektedir. Buradan elde edilen sonuçlara bağlı olarak, gerekli olması durumda tüm organizmadaki etkileri deney hayvanları üzerinde in vivo olarak incelenebilmektedir. Bu amaçla genç wistar sıçanları deney gruplarına (deney ve kontrol) ayrılarak, su ihtiyaçları 3 ila 6 ay süre ile çalışma alanından temin edilen su örnekleri ile karşılanmaktadır. Belirli zaman noktalarında her bir gruptaki deneklerden kan ve idrar numunesi alınarak rutin biyokimya analizleri ile hemogramı analizlenerek değişimler kaydedilmektedir. Ayrıca aylık periyotlarla örneklemdeki denekler sakrifiye edilerek endojen dokuların genel muayenesi yapılarak histolojik ve kimyasal analizler için karaciğer, böbrek ve kalp dokusundan örnekler alınmaktadır. Doku örneklerinin bir kısmı mikrodalga kullanılarak homojenizat haline getirilir ve element içeriğindeki değişimler ICP_OES ile tayin edilmektedir. Diğer kısmı ise %10’luk formaldehitte tespit edildikten sonra dondurarak kesit alma yöntemine göre 5 um’lik ince kesitleri alınarak histopatalojik olarak incelenmektedir. Bu çalışmalar göstermişti ki su analizlerinde kullanılan bilindik yöntemler çok kıymetli olsa da sitotoksik analiz yöntemiyle yapılan su kalitesi çalışması su kalitesinin direkt canlı doku üzerinde etkilerinin gözlenmesi açısından güvenilirlik sağlamaktadır. Sunulan çalışmada, sonuçlarının çarpıcılığı nedeniyle İncesu Havzasından alınan su numuneleri için yürütülen in vitro sitotoksisite çalışmaları örnek olarak verilmiştir. Elde edilen sonuçlar ışığında in vitro sitotoksisite testlerinin rutin su kalitesi analizlerine eklenmesi gerektiği önerilmektedir.
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