Bu çalışma Tokat-Kazova şartlarında Başçiftlik Beyazı patates çeşidinde farklı azot dozları ve organik gübre uygulamasının verim ve kalite özelliklerine etkisini belirlemek amacıyla yapılmıştır. Araştırma 2016 ve 2017 yıllarında Tesadüf Blokları Deneme Desenine göre üç tekerrürlü olarak yürütülmüştür. Araştırmada azot dozları 0 (kontrol), 10, 15, 20, 25, 30 kg N/da ve tek doz organik gübre (300 kg/da) olacak şekilde uygulanmıştır. İncelenen özellikler; bitki boyu, ana sap sayısı, ocak başına yumru verimi, ortalama yumru ağırlığı, ocak başına yumru sayısı, dekara yumru verimi, kuru madde oranı, nişasta oranı ve pazarlanabilir yumru oranıdır. İncelenen özelliklerden ana sap sayısı ve ocak başına yumru sayısı hariç, diğer tüm özellikler organik gübre ve azot dozlarından önemli şekilde etkilenmiştir. Dekara yumru verimi en düşük kontrolde (0 kg N/da) 2772,1 kg/da iken, en yüksek 3961,8 kg/da ile 20 kg N/da uygulamasından elde edilmiştir. Organik gübre (300 kg/da) uygulamasında ise 3083,7 kg/da yumru verimi alınmıştır. Uygulanan N dozları yumru iriliğini belli bir doza kadar artırmış, ortalama yumru ağırlığı 25 kg N/da uygulamasında 95,2 g ile en yüksek olmuştur. Artan azot dozları denemenin ilk yılında 20 kg N/da, ikinci yılında ise 30 kg N/da dozunda en yüksek verim seviyesine ulaşmıştır. Her ne kadar organik gübre uygulamasından (3083,7 kg/da) kontrol uygulamasına (2772,1 kg/da) göre daha iyi sonuç alınmış ise de dekara yumru verimini artırmak için azotlu gübre uygulaması yapılmasının gerektiği ve iki yılın ortalamasına göre 20 kg/da azot uygulamasının (3961,8 kg/da) yapılması önerilmiştir.

Bu çalışmanın amacı, Trakya Bölgesi’nde iklim değişikliğinin buğday bitkisinin verimine etkisini modellemektir. Bu amaçla, çiftçi tarlasından alınan 2020-2021 dönemi buğday verim değeri, aynı yıla ait iklim verileri kullanılarak LINTUL model ile hesaplanan verim değeri ile karşılaştırılarak kalibre edilmiş ve daha sonra HadGEM2-ES ve MPI-ESM-MR küresel iklim modellerinin RCP4.5 ve RCP8.5 senaryolarından elde edilen iklim verileri ile 2031-2040, 2041-2050, 2051-2060, 2061-2070 ve 2071-2080 dönemleri için verim değerleri tahmin edilmiştir. Ekim ve hasat tarihleri değiştirilmeden iki şekilde verim tahmini yapılmıştır: Birincisinde, ortalama en düşük ve en yüksek sıcaklık, solar radyasyon ve yağış değişimi dikkate alınarak verim hesaplaması yapılmıştır. İkincisinde ise solar radyasyon değerleri 2004-2021 dönemi için sabit tutulurken, ortalama en düşük ve en yüksek sıcaklık ve yağış değişimleri hesaba katılmıştır. Birinci yaklaşımda, HadGEM2-ES modelinin RCP4.5 ve RCP8.5 senaryoları için tahmin edilen verim değişimleri sırasıyla %1,5-%7,5 ve -%7,5-%7,5 arasında hesaplanırken, MPI-ESM-MR modeli için yine aynı sırayla %9,0-%13,4 ve %3,0-%16,4 arasında simüle edilmiştir. İkinci yaklaşımda, HadGEM2-ES modelinin RCP4.5 ve RCP8.5 senaryoları için tahmin edilen verim değişimleri sırasıyla %4,5-%9,0 ve -%7,5-%7,5 arasında hesaplanırken, MPI-ESM-MR modeli için yine aynı sırayla %10,4-%13,4 ve %4,5-%19,5 arasında tahmin edilmiştir. Verim tahminlerinde sıcaklık ve yağışla birlikte solar radyasyonun etkisinin de mutlaka göz önünde bulundurulması gerektiği; Türkiye’nin diğer bölgelerinin aksine iklim değişimi ile verimin genelde artış yönünde olacağı tahmin edildiğinden gıda güvencesi için Trakya Bölgesi tarım arazilerinin değişimine izin verilmemesi gerektiği sonucuna varılmıştır.

Agriculture must be necessary and sustainable for the continuity of human beings. For sustainable agriculture, productive crops can be made with good irrigation in productive crops and conscious irrigation in good irrigation. A survey was conducted with 111 producers in the central district of Tokat province to determine the factors affecting conscious irrigation and conscious irrigation. In the research, first of all, the socio-demographic structure of the producers was determined: it was determined that the producers with an active working population had a low level of education. In the second part of the research, irrigation information was tried to be determined and it was observed that most of the producers were doing salman irrigation. In the third part of the research, irrigation awareness was tried to be determined by using the scoring method of the producers and it was determined that 24% of the producers were in the category with a high level of awareness. In the last part, the factors affecting irrigation awareness were determined with the help of the ordered probit model. As a result, it has been determined that there is a linear relationship between the level of awareness of the producers, their educational status and membership in the irrigation union.

Tahini is a food product that is frequently preferred both directly and as a main ingredient in various ready-to-eat food products and is consumed with interest, especially in the Middle East geography. Its reputation has recently spread across continents to countries like Canada and the United States of America. Tahini was subjected to a number of analyses to ascertain its physicochemical and microbiological quality within the context of the study since it is a highly consumed product with high consumption and demand values. In this context, tahini samples of 10 different brands were collected from producers and commercially sold markets in Balikesir and Bursa. Samples were taken from two different lot numbers for each company. As a result of the analyzes made on the tahini samples, it was determined that the total oil amount of the samples changed between 49.76-58.7%, the salt amount changed between 0.001-0.0027%, the ash amount was between 1.02%-1.28%, and the moisture value was between 1.1-1.5%; as a result of microbiological cultivations in which the presence of yeast and mold were analyzed, an average of 75 CFU/g viability was determined, while Escherichia coli, which was screened as an indicator of fecal contamination, Staphylococcus aureus and Salmonella spp, which are pathogenic microorganisms, were not found to be contaminated in all tahini samples. One of the tahini samples was not found in accordance with the Turkish Food Codex Tahini Communiqué (TFC) in terms of the amount of oil. It is concluded that 90% of the samples were manufactured in line with the TFC when the results of the chemical and microbiological analyses were combined.

Different brewing methods can lead to changes in the physicochemical properties of green tea. In this study, the physicochemical properties of green tea brewed with different amounts (5, 7.5 and 10 grams) and times (5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, and 60 minutes) were investigated. Green tea produced by Çaykur was used in the study. Mineral analysis of green tea samples was performed with ICP-OES, and color analysis was performed with Minolta Spectrophotometer. The antioxidant activity was assessed using the DPPH method and the total phenolic content was determined using the Folin–Ciocalteu method. In terms of mineral content, it was determined highest levels of mineral content (mg/kg) for Al, Ca and Mg (10 g-25 minutes); Fe, Mn and Na (10 g-25 minutes); and B (10 g-50 minutes) as 16.005, 4.099, 24.075, 0.120, 13.855, 1.320 and 0.164, respectively. It was determined lowest levels of mineral content (mg/kg) for Al, Ca, Mg, and Mn (5 g-5 minutes); B and Fe (5 g-10 minutes), and Na (5 g-15 minutes) as 2.756, 1.193, 3.324, 1.23, 0.025, 0.002 and 0.48, respectively. In terms of color, it was determined that the lowest and highest L* values are 39.97 (10 g-45 minutes) -54.23 (5 g-35 minutes), lowest and highest a* values are -2.24 (5 g-5 minutes) (-4.70) (7.5 g-35 minutes) and lowest and highest b* values are 4.91 (5 g-5 minutes)- 23.98 (10 g-60 minutes). The antioxidant activity value (inhibition %) in green tea was found to be the range of 28.51 % (5 g, 45 minutes)- 47.95 (10 g- 40 minutes), and the total phenolic content (mg GAE/mL) was found to be the range of 15.99 (5 g, 5 minutes)- 35.61 (10 g, 15 minutes). The findings determined that green tea brewed with different amounts and times showed statistical differences in terms of color, mineral content, antioxidant activity, and total phenolic content.

Purslane (Portulaca oleracea L.) is an edible wild plant that is widely grown in the world, including Türkiye. Purslane plant, which is an important component of Mediterranean cuisine, can grow spontaneously in nature. Stress conditions can directly or indirectly affect its growth and development in the environment in which it is grown. In the current study, stress conditions of soil organic matter content, irrigation water amount and irrigation water salinity were investigated in pot experiments. The experiments were carried out in a 72 m2 greenhouse established on the Dokuz Eylül University Tınaztepe Campus. From the variables, soil organic matter was applied as 1%, 1.8% (control), 3% and 5% on a dry weight basis. 15 purslane seeds were planted in each pot and left to germinate. Irrigation water amounts were chosen as 100%, 75%, 50%, 30%, 15% of the field capacity. The last variable in the application was determined as the salinity of the irrigation water; the conductivity of the applied irrigation waters were control (tap water-about 0.5 mS/cm), 4 mS/cm, 8 mS/cm, 16 mS/cm. All pots were prepared in four repetitions and the study was carried out with a total of 320 pots. Experiments were carried out for 90 days from the first planting. In the study, it was observed that the increase in organic matter increased plant germination. Statistical evaluation was also made and the effects of irrigation water amount and salinity were also evaluated according to principal component analysis. As the field capacity decreased, decreases were observed in plant growth, but this was mostly observed at 30% and 15% field capacity. The negative effects of salinity on plant growth were observed at 8 mS/cm and 16 mS/cm values.

The aim of this study was to determine the relationships of udder surface temperature (UST) with milk components, and somatic cell count (SCC) in dairy cows during the hot season. The study was carried out with 115 lactating dairy cows (Holstein, Simmental, and Holstein × Simmental) at a private dairy farm in Samsun, Turkey, with monthly visits. The UST was measured from the udder surface before cleaning and milking. At the same time, a portable cell counter and an automatic milk analyzer were used to determine the components and the SCC of the raw milk. The UST values of the cows changed significantly. Increased UST had an adverse effect on milk solids-non-fat (SNF), protein, lactose, and density levels. LogSCC values of cow groups with UST ≤35.0°C, 35.1-36.0°C, >36.0°C were found to be 4.475±0.0803, 4.774±0.1244, and 4.981±0.1491 respectively. The UST negatively correlated with SNF, protein, lactose, density, and freezing point, but positively correlated with LogSCC. As a result, performing UST measurements before milking may be beneficial to monitor udder health and to obtain high quality milk.

This study was performed to determine the effect of hatching system (house and hatcher) and egg weight (heavy and light) on pip-hatch time, hatchability and some gosling quality traits. A total of 389 eggs (fertile of candling) from 2-year-old Turkish Native Goose were used in the study. Before the incubation process, all eggs were individually numbered and weighed. Eggs were divided into heavy (≥160 g) and light (