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Prof. atılgan atılgan
Isparta University of Applied Sciences

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Journal article
Published: 10 August 2021 in Applied Sciences
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Sustainable and profitable crop production has become a challenge due to frequent weather extremes, where unstable crop yields are often followed by the negative impacts of agronomic practices on the environment, i.e., nitrate leaching in irrigated and nitrogen (N)-fertilized crop production. To study this issue, a three-year field study was conducted during quite different growing seasons in terms of weather conditions, i.e., extremely wet, extremely dry, and average years. Over three consecutive years, the irrigation and N fertilizers rates were tested for their effect on grain yield and composition, i.e., protein, starch, and oil content of the maize hybrids; soil N level (%); and nitrate leaching. The results showed that the impact of the tested factors and their significance was year- or weather-condition-dependent. The grain yield result stood out during the extremely wet year, where the irrigation rate reduced the grain yield by 7.6% due to the stress caused by the excessive amount of water. In the remainder of the study, the irrigation rate expectedly increased the grain yield by 13.9% (a2) and 20.8% (a3) in the extremely dry year and 22.7% (a2) and 39.5% (a3) during the average year. Regardless of the weather conditions, the N fertilizer rate increased the grain yield and protein content. The soil N level showed a typical pattern, where the maximum levels were at the beginning of the study period and were higher as the N fertilizer rate was increased. Significant variations in the soil N level were found between weather conditions (r = −0.719) and N fertilizer rate (r = 0.401). Nitrate leaching losses were expectedly found for irrigation and N fertilizer treatments with the highest rates (a3b3 = 79.8 mg NO3 L).

ACS Style

Monika Marković; Jasna Šoštarić; Marko Josipović; Atilgan Atilgan. Extreme Weather Events Affect Agronomic Practices and Their Environmental Impact in Maize Cultivation. Applied Sciences 2021, 11, 7352 .

AMA Style

Monika Marković, Jasna Šoštarić, Marko Josipović, Atilgan Atilgan. Extreme Weather Events Affect Agronomic Practices and Their Environmental Impact in Maize Cultivation. Applied Sciences. 2021; 11 (16):7352.

Chicago/Turabian Style

Monika Marković; Jasna Šoštarić; Marko Josipović; Atilgan Atilgan. 2021. "Extreme Weather Events Affect Agronomic Practices and Their Environmental Impact in Maize Cultivation." Applied Sciences 11, no. 16: 7352.

Journal article
Published: 10 March 2021 in Applied Sciences
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Watermark, Tensiometer and Time Domain Reflectometry (TDR) are commonly used soil water sensors in irrigation practice whose performance depends on soil type, depth and growing conditions. Here, the results of sensor performance evaluation in different soil depths as well as the field and laboratory testing in silty clay loamy soil are presented. Gravimetric soil moisture samples were taken from sensor installation depths (10, 20, 30 and 45 cm) and used as reference Soil Water Content (SWC). The measurements varied significantly (p < 0.05) across the monitoring depths. On average across the soil depths, there was a strong negative linear relationship between Watermark (r = −0.91) and TDR (r = 0.94), and a moderate negative (r = −0.75) linear relationship between SWC and Tensiometer. In general, Watermark and Tensiometer measured SWC with great accuracy in the range of readily available water, generated larger Mean Difference (MD) than TDR and overestimated SWC, while TDR underestimated SWC. Overall, laboratory testing reduced the root mean square error (RMSE, Watermark = 1.2, Tensiometer = 2.6, TDR = 1.9) and Mean Average Error (MAE, Watermark = 0.9, Tensiometer = 2.04. TDR = 1.04) for all tested sensors.

ACS Style

Monika Marković; Goran Krizmanić; Andrija Brkić; Atilgan Atilgan; Božica Japundžić-Palenkić; Davor Petrović; Željko Barač. Sustainable Management of Water Resources in Supplementary Irrigation Management. Applied Sciences 2021, 11, 2451 .

AMA Style

Monika Marković, Goran Krizmanić, Andrija Brkić, Atilgan Atilgan, Božica Japundžić-Palenkić, Davor Petrović, Željko Barač. Sustainable Management of Water Resources in Supplementary Irrigation Management. Applied Sciences. 2021; 11 (6):2451.

Chicago/Turabian Style

Monika Marković; Goran Krizmanić; Andrija Brkić; Atilgan Atilgan; Božica Japundžić-Palenkić; Davor Petrović; Željko Barač. 2021. "Sustainable Management of Water Resources in Supplementary Irrigation Management." Applied Sciences 11, no. 6: 2451.

Journal article
Published: 26 December 2020 in Turkish Journal of Agriculture - Food Science and Technology
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In this study, the effects of four different color plastic greenhouse treatments on nutrient concentrations of leaf and fruit, leaf SPAD (Soil and Plant Analyzer Development) values and some yield parameters of tomato were tried to be determined. For this purpose, plastic greenhouses with Red (RedG), Blue (BlueG), Colorless (ConG) and white Led (LedG) lighting have been used as materials in the research. The used plastic greenhouses are 3 m in width, 6 m in length, 2 m in sidewall height and 2.8 m in roof ridge height. Led lighting is; Three hours of extra lighting is planned for one hour before sunrise, 2 hours after sunset. The research was carried out in ISUBU (Isparta), Faculty of Agriculture, field area in the summer season in 2019. The nutrient elements of K, Ca, Mg, P, Cu, Zn, Mn and Fe were determined in the leaf and of the tomato plant. It has been determined that four different greenhouse treatments have a positive effect on K, Ca, Cu, Zn, Fe nutrients in leaf, and K, Ca, P, Mg nutrient in fruit. In terms of SPAD values, all treatments were determined to be higher than the control treatment. It was determined that the highest SPAD value was in BlueG treatment. When the efficiency-related values are examined; It was determined that the highest fruit number, fruit weight and yield were in BlueG treatment. BlueG treatment was followed by RedG, ConG, and LedG treatment respectively in terms of efficiency. As a result, considering the effects of four different greenhouse treatments on macro and micronutrient nutritions SPAD values, and yield values, it was concluded that the most suitable treatments for tomato cultivation in greenhouses is BlueG treatment and RedG treatment should not be ignored.

ACS Style

Atılgan Atılgan; Ibrahim Erdal; Hakan Aktaş; Eren Çetin. Effects of The Use of Colored Cover Materials and Led Lighting in Greenhouses on Plant Nutrient Concentration: Case of Tomato Plant (Solanum lycopersicum L.). Turkish Journal of Agriculture - Food Science and Technology 2020, 8, 1 .

AMA Style

Atılgan Atılgan, Ibrahim Erdal, Hakan Aktaş, Eren Çetin. Effects of The Use of Colored Cover Materials and Led Lighting in Greenhouses on Plant Nutrient Concentration: Case of Tomato Plant (Solanum lycopersicum L.). Turkish Journal of Agriculture - Food Science and Technology. 2020; 8 (12):1.

Chicago/Turabian Style

Atılgan Atılgan; Ibrahim Erdal; Hakan Aktaş; Eren Çetin. 2020. "Effects of The Use of Colored Cover Materials and Led Lighting in Greenhouses on Plant Nutrient Concentration: Case of Tomato Plant (Solanum lycopersicum L.)." Turkish Journal of Agriculture - Food Science and Technology 8, no. 12: 1.

Journal article
Published: 20 December 2019 in Turkish Journal of Agriculture - Food Science and Technology
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In this study, tomato plant, which is among the most grown vegetables in our country, was chosen as the subject of the research. In the production of tomato, Çukurova region has an increasing production potential in recent years. Therefore, Çukurova region was chosen as the study area. In this study, the long-term temperature and rainfall values of the provinces in the research area constituted the material of the study. Growing Degree-Day (GDD) method was used in the study. The base temperatures were selected for the developmental stages of the tomato plant. GDD values were calculated according to the base temperature values of tomato plant in the developmental periods. The calculated values were examined and the suitability of the provinces in the research area was determined. In line with this information, it was concluded that the province of Mersin stands out. Predetermination of crop production areas and production according to these areas will affect the yield positively. Therefore, the increase of the producer's income will also contribute to the national economy in a positive way. In addition, multiple nonlinear regression equations were developed according to the basic temperature values selected for the growth stages of tomato plant. As a result, by using these equations, it was concluded that the variables that affect GDD values of tomato plant will be informed about the development of tomato in advance.

ACS Style

Ali Yücel; Atilgan Atilgan; Hakan Aktaş. Domates (Solanum lycopersicum L.) Bitkisinin Büyüme Derece-Gün Değerlerinin Modellenmesi: Çukurova Yöresi Örneği. Turkish Journal of Agriculture - Food Science and Technology 2019, 7, 23 -28.

AMA Style

Ali Yücel, Atilgan Atilgan, Hakan Aktaş. Domates (Solanum lycopersicum L.) Bitkisinin Büyüme Derece-Gün Değerlerinin Modellenmesi: Çukurova Yöresi Örneği. Turkish Journal of Agriculture - Food Science and Technology. 2019; 7 (sp2):23-28.

Chicago/Turabian Style

Ali Yücel; Atilgan Atilgan; Hakan Aktaş. 2019. "Domates (Solanum lycopersicum L.) Bitkisinin Büyüme Derece-Gün Değerlerinin Modellenmesi: Çukurova Yöresi Örneği." Turkish Journal of Agriculture - Food Science and Technology 7, no. sp2: 23-28.