The effect of zinc fertilization on yield and quality of commercial processing tomato (Solanum lycopersicum L.) cultivars
Year 2024,
, 285 - 296, 18.09.2024
Yahya Nas
,
İbrahim Duman
Abstract
Objective: In this study, conducted in two production seasons, the effects of zinc fertilization on yield and fruit quality of processing tomato varieties (H-1015, Lalin and Kendras) were investigated.
Material and Method: Material consisted of ‘H-1015’, ‘Lalin’, and Kendras’ processing tomato varieties. The study consisted of 3 different treatments; zinc applied plots, zinc-free plots and control.
Results: The results showed that zinc application to H-1015 and Lalin cultivars gave the highest yield values compared to zinc-free and control treatments in both production seasons. While the differences between the pulp colour values L* and a/b were found to be insignificant in both years, the differences between the values of a* and b* were found to be significant in both years. Similarly, zinc fertilization had no positive effects on the TA and lycopene contents of the varieties. The differences between the fruit pH values of the varieties were found to be significant. While the differences among the Brix values were found to be significant only in 2018, the variety H-1015 showed the highest Brix values in both testing years.
Conclusion: Zinc fertilization is proposed to obtain a high yield in processing tomatoes.
Supporting Institution
Ege University Scientific Research Projects Coordination
Project Number
BAP, Project No; 2018-ZRF-003
References
- Agrawal, B., A. Shrivastava & N. Harmukh, 2010. Effect of irrigation methods and micronutrients on nutrient uptake of tomato F1 hybrid avinash-2. International Journal of Current Trends in Science and Technology, 1: 20-26.
- Ahmed, R., M. Yusoff Abd Samad, M. K. Uddin, M. A. Quddus & M. M. Hossain, 2021. Recent trends in the foliar spraying of zinc nutrient and zinc oxide nanoparticles in tomato production. Agronomy, 11: 2074. https://doi.org/10.3390/agronomy11102074
- Ali, M. R., H. Mehraj & A. F. M. Jamal Uddin, 2015. Effects of foliar application of zinc and boron on growth and yield of summer tomato. Journal of Bioscience and Agriculture Research, 6: 512-517. http: //dx.doi.org/10.18801/jbar.060115.61
- Alloway, B. J., 2009. Soil factors associated with zinc deficiency in crops and humans. Environmental Geochemistry and Health, 31: 537-548. https://doi.org/10.1007/s10653-009-9255-4
- Anonymous, 2020a. WPTC, World Processing Tomato Council. (Web page: https://www.wptc.to/) (Date accessed: 4 April 2020).
- Anonymous, 2020b. HeinzSeed Tomato. (Web page: https://www.heinzseed.com/product/100004200011/H1015-EFS) (Date accessed: 4 April 2020).
- Anonymous, 2020c. Bayer Nunhems Vegetable Seeds- Seed Catalogue. (Web page: https://issuu.com/sczorlu/docs/catalogue_lowres_2) (Date accessed: 4 April 2020).
- Anonymous, 2020d. May Seed Tomato. (Web page: http://www.may.com.tr/en/products/tomato) (Date accessed: 4 April 2020).
- Anthon, G. E., M. LeStrange & D. M. Barrett, 2011. Changes in pH, acids, sugars and other quality parameters during extended vine holding of ripe processing tomatoes. Journal of the Science of Food and Agriculture, 91: 1175-1181. https://doi.org/10.1002/jsfa.4312
- Bashir, F. & A. Manan, 2012. Efficacy of zinc with nitrogen as foliar feeding on growth, yield and quality of tomato grown under poly tunnel. Pakistan Journal of Agricultural Sciences, 49: 331-333.
- Bettiol, W., R. Ghini, J. A. H. Galvão & R. C. Siloto, 2004. Organic and conventional tomato cropping systems. Scientia Agricola, 61: 253-259. https://doi.org/10.1590/S0103-90162004000300002
- Bouyoucos, G. J., 1962. Hydrometer method improved for making particle size analyses of soils 1. Agronomy Journal, 54: 464-465.
- Cakmak, I., M. Kalaycı, H. Ekiz, H. J. Braun, Y. Kılınç & A. Yılmaz, 1999. Zinc deficiency as a practical problem in plant and human nutrition in Turkey: a NATO-science for stability project. Field Crops Research, 60: 175-188. https://doi.org/10.1016/S0378-4290(98)00139-7
- Chapman, H. D., 1965. “Cation-Exchange Capacity”. In: Black, C.A., Ed., Method of Soil Analysis, Part 2: Chemical and Microbiological Properties, ASA, Madison, 891-900.
- Davis, A. R., W. W. Fish & P. Perkins-Veazie, 2003. A rapid spectrophotometric method for analyzing lycopene content in tomato and tomato products. Postharvest Biology and Technology, 28: 425-430. https://doi.org/10.1016/S0925-5214(02)00203-X
- Dube, B. K., P. Sinha & C. Chatterjee, 2003. Effect of zinc on yield and quality of tomato. Indian Journal of Horticulture, 60: 59-63.
- Dumas, Y., M. Dadomo, G. Di Lucca & P. Grolier, 2003. Effects of environmental factors and agricultural techniques on antioxidant content of tomatoes. Journal of the Science of Food and Agriculture, 83: 369-382. https://doi.org/10.1002/jsfa.1370
- Ejaz, M., R. Waqas, M. Butt, S. U. Rehman & A. Manan, 2011. Role of macro-nutrients and micro-nutrients in enhancing the quality of tomato. International Journal of Agriculture and Veterinary Sciences, 5: 401-404.
- FAOSTAT, 2020. FAOSTAT Statistics. (Web page: http://www.fao.org/faostat/en/#data/QC/visualize) (Date accessed: 24 March 2020).
- Foolad, M. R., 2007. Genome mapping and molecular breeding of tomato. International Journal of Plant Genomics, 1-52. https://doi.org/10.1155/2007/64358
- Fridman, E., T. Pleban & D. Zamir, 2000. A recombination hotspot delimits a wild-species quantitative trait locus for tomato sugar content to 484 bp within an invertase gene. Proceedings of the National Academy of Sciences (PNAS), 97: 4718-4723. https://doi.org/10.1073/pnas.97.9.4718
- Grandillo, S., D. Zamir & S. D. Tanksley, 1999. Genetic improvement of processing tomatoes: A 20 years perspective. Euphytica, 110: 85-97. https://doi.org/10.1023/A: 1003760015485
- Gurmani, A. R., S. U. Khan, R. Andaleep, K. Waseem & A. Khan, 2012. Soil application of zinc improves growth and yield of tomato. International Journal of Agriculture & Biology, 14: 91-96.
- Haleema, B., A. Rab & S. A. Hussain, 2018. Effect of calcium, boron and zinc foliar application on growth and fruit production of tomato. Sarhad Journal of Agriculture, 34: 19-30.
- Harris, K. D. & V. Mathuma, 2015. Effects of foliar application of boron and zinc and their combinations on the quality of tomato (Lycopersicon esculentum Mill.). European Academic Research, 3: 1097-1112.
- Horneck, D. A., J. M. Hart, K. Topper & B. Koepsell, 1989. Methods of Soil Analysis Used in the Soil Testing Laboratory at Oregon State University.
- Kacar, B., 2009. Toprak analizleri. Nobel Yayın Dağıtım, Ankara, 467 s.
- Kazemi, M., 2013. Effects of Zn, Fe and their combination treatments on the growth and yield of tomato. Bulletin of Environment, Pharmacology. Life Sciences, 3: 109-114.
- Lindsay, W. L. & W. Norvell, 1978. Development of a DTPA soil test for zinc, iron, manganese, and copper. Soil Science Society of America Journal, 42: 421-428.
- Marschner, H., 2012. Marschner's Mineral Nutrition of Higher Plants, 3rd Edition, Elsevier/Academic Press. https://doi.org/10.1016/C2009-0-63043-9
- Martin, A. E. & R. Reeve, 1955. A rapid manometeic method for determining soil carbonate. Soil Science, 79: 187-198.
- McGuire, G. R., 1992. Reporting of objective color measurements. HortScience, 27: 1254-1255. https://doi.org/10.21273/HORTSCI.27.12.1254
- Mousavi, S. R. 2011. Zinc in crop production and interaction with phosphorus. Australian Journal of Basic and Applied Sciences, 5: 1503-1509.
- Nas, Y., B. Türk, İ. Duman, F. Şen & Ö. Tuncay, 2018. The effect of different type soils on fruit pH, yield and some quality properties in processing tomato production. Journal of Agriculture Faculty of Ege University, 55: 311-317. https://doi.org/10.20289/zfdergi.394142
- Nas, Y., İ. Duman & M. A. Ul, 2017. The influence of final irrigation treatments on yield and fruit quality for processing tomatoes cultivated in different soil types. Journal of Agriculture Faculty of Ege University, 54: 223-230. https://doi.org/10.20289/zfdergi.387334
- Nawaz, H., M. Zubair & H. Derawadan, 2012. Interactive effects of nitrogen, phosphorus and zinc on growth and yield of tomato (Solanum lycopersicum). African Journal of Agricultural Research, 7: 3792-3769.
- Olsen, S. R., 1954. Estimation of available phosphorus in soils by extraction with sodium bicarbonate (No. 939). US Department of Agriculture.
- Prasad, P. S., C. T. Subbarayappa, A. Sathish, & V. Ramamurthy, 2021. Impact of zinc fertilization on tomato (Solanum lycopersicum L.) yield, zinc use efficiency, growth and quality parameters in Eastern Dry Zone (EDZ) soils of Karnataka, India. International Journal of Plant & Soil Science, 33: 20-38.
- Ronga, D., E. Francia, F. Rizza, F. W. Badeck, F. Caradonia, G. Montevecchi & N. Pecchioni, 2019. Changes in yield components, morphological, physiological and fruit quality traits in processing tomato cultivated in Italy since the 1930’s. Scientia Horticulturae, 257: 108726. https://doi.org/10.1016/j.scienta.2019.108726
- Saravaiya, S. N., P. B. Jadhav, S. S. Wakchaure, N. B. Harad, N. B. Patil, S. S. Dekhane & D. J. Patel, 2014. Influence of foliar application of micronutrients on tomato (Lycopersicon esculentum Mill.) cv." Gujarat Tomato 2". International Journal of Tropical Agriculture, 32: 451-458.
- Shnain, R. S., V. M. Prasad & S. Saravanan, 2014. Effect of zinc and boron on growth, yield and quality of tomato (Lycopersicon esculentum. Mill) cv. Heem Sohna, under protected cultivation European Academic Research, 2: 78-79.
- Singh, B., S. Kasera, S. K. Mishra, S. Roy, S. Rana & D. Singh, 2017. Growth, yield and quality of cherry tomato (Lycopersicon esculentum var. cerasiforme) as influenced by foliar application of zinc and boron. Journal of Pharmacognosy and Phytochemistry, 6: 911-914.
- Soil Survey Division Staff, 1993. Soil Survey Manual. Soil Conservation Service, U.S. Department of Agriculture Handbook 18, Chapter 3.
- Sultana, S., H. M. Naser, S. Akhter & R. A. Begum, 2016. Effectiveness of soil and foliar applications of zinc and boron on the yield of tomato. Bangladesh Journal of Agricultural Research, 41: 411-418. https://doi.org/10.3329/bjar.v41i3.29712
- Swetha, K., S. Saravanan & L. N. Banothu, 2018. Effect of micronutrients on fruit quality, shelf life and economics of tomato (Solanum lycopersicum L.) cv. Pkm-1. Journal of Pharmacognosy and Phytochemistry, 7: 3018-3020.
- Ullah, R., G. Ayub, M. Ilyas, M. Ahmad, M. Umar, S. Mukhtar & S. Farooq, 2015. Growth and yield of tomato (Lycopersicon esculentum L.) as influenced by different levels of zinc and boron as foliar application. American-Eurasian Journal of Agricultural & Environmental Sciences, 15: 2495-2498.
- Vural, H., D. Eşiyok & İ. Duman, 2000. Culture Vegetables: Vegetable Growing (in Turkish). Ege University Printing House, İzmir.
- Walkley, A. & I. A. Black, 1934. An examination of the degtjareff method for determining soil organic matter, and a proposed modification of the chromic acid titration method. Soil Science, 37: 29-38.
Çinko gübrelemesinin sanayi tipi domates (Solanum lycopersicum L.) çeşitlerinde verim ve kalite üzerine etkisi
Year 2024,
, 285 - 296, 18.09.2024
Yahya Nas
,
İbrahim Duman
Abstract
Amaç: İki üretim sezonunda gerçekleştirilen bu çalışmada, çinko gübrelemesinin sanayi domatesi çeşitlerinde (H-1015, Lalin ve Kendras) verim ve meyve kalitesi üzerine etkileri araştırılmıştır.
Materyal ve Yöntem: Materyal 'H-1015', 'Lalin' ve Kendras' sanayi domates çeşitlerinden oluşmuştur. Çalışma; çinko uygulanan, çinko uygulanmayan ve kontrol olmak üzere 3 farklı parselden oluşturulmuştur
Araştırma Bulguları: Sonuçlar, H-1015 ve Lalin çeşitlerine çinko uygulamasının her iki üretim sezonunda da çinkosuz ve kontrol uygulamalarına göre en yüksek verim değerlerini göstermiştir. Pulp rengi L* ve a/b değerleri arasındaki farklılıklar her iki yılda da önemsiz çıkarken, a* ve b* değerleri arasındaki farklılıklar ise her iki yılda da önemli bulunmuştur. Benzer şekilde çinko gübrelemesi çeşitlerin TA ve likopen içeriği üzerine önemli bir etkisi olmamıştır. Çeşitlerin meyve pH değerleri arasındaki farklılıklar ise önemli bulunmuştur. Briks değerleri arasındaki farklılıklar, sadece 2018 yılında önemli çıkmakla birlikte, H-1015 çeşidi her iki deneme yılında da en yüksek briks değerlerini göstermiştir
Sonuç: Sanayi domatesinde yüksek verim elde etmek için çinko gübrelemesi önerilmektedir.
Supporting Institution
Ege University
Project Number
BAP, Project No; 2018-ZRF-003
Thanks
The authors express their gratitude to the Ege University Office of Scientific Research Projects for providing the financial support (grant number: 2018-ZRF-003) to the study. Also, the authors would like to greatly thank to H. Gül GÜLCÜOĞLU, who provided support in the conduct of the study and who opened her farm for the execution of the experiment, and to the employees of Gülcüoğlu farm, to the employees of TAT Gıda A.Ş. Torbalı Enterprise, and our colleagues who assisted in laboratory analyses.
References
- Agrawal, B., A. Shrivastava & N. Harmukh, 2010. Effect of irrigation methods and micronutrients on nutrient uptake of tomato F1 hybrid avinash-2. International Journal of Current Trends in Science and Technology, 1: 20-26.
- Ahmed, R., M. Yusoff Abd Samad, M. K. Uddin, M. A. Quddus & M. M. Hossain, 2021. Recent trends in the foliar spraying of zinc nutrient and zinc oxide nanoparticles in tomato production. Agronomy, 11: 2074. https://doi.org/10.3390/agronomy11102074
- Ali, M. R., H. Mehraj & A. F. M. Jamal Uddin, 2015. Effects of foliar application of zinc and boron on growth and yield of summer tomato. Journal of Bioscience and Agriculture Research, 6: 512-517. http: //dx.doi.org/10.18801/jbar.060115.61
- Alloway, B. J., 2009. Soil factors associated with zinc deficiency in crops and humans. Environmental Geochemistry and Health, 31: 537-548. https://doi.org/10.1007/s10653-009-9255-4
- Anonymous, 2020a. WPTC, World Processing Tomato Council. (Web page: https://www.wptc.to/) (Date accessed: 4 April 2020).
- Anonymous, 2020b. HeinzSeed Tomato. (Web page: https://www.heinzseed.com/product/100004200011/H1015-EFS) (Date accessed: 4 April 2020).
- Anonymous, 2020c. Bayer Nunhems Vegetable Seeds- Seed Catalogue. (Web page: https://issuu.com/sczorlu/docs/catalogue_lowres_2) (Date accessed: 4 April 2020).
- Anonymous, 2020d. May Seed Tomato. (Web page: http://www.may.com.tr/en/products/tomato) (Date accessed: 4 April 2020).
- Anthon, G. E., M. LeStrange & D. M. Barrett, 2011. Changes in pH, acids, sugars and other quality parameters during extended vine holding of ripe processing tomatoes. Journal of the Science of Food and Agriculture, 91: 1175-1181. https://doi.org/10.1002/jsfa.4312
- Bashir, F. & A. Manan, 2012. Efficacy of zinc with nitrogen as foliar feeding on growth, yield and quality of tomato grown under poly tunnel. Pakistan Journal of Agricultural Sciences, 49: 331-333.
- Bettiol, W., R. Ghini, J. A. H. Galvão & R. C. Siloto, 2004. Organic and conventional tomato cropping systems. Scientia Agricola, 61: 253-259. https://doi.org/10.1590/S0103-90162004000300002
- Bouyoucos, G. J., 1962. Hydrometer method improved for making particle size analyses of soils 1. Agronomy Journal, 54: 464-465.
- Cakmak, I., M. Kalaycı, H. Ekiz, H. J. Braun, Y. Kılınç & A. Yılmaz, 1999. Zinc deficiency as a practical problem in plant and human nutrition in Turkey: a NATO-science for stability project. Field Crops Research, 60: 175-188. https://doi.org/10.1016/S0378-4290(98)00139-7
- Chapman, H. D., 1965. “Cation-Exchange Capacity”. In: Black, C.A., Ed., Method of Soil Analysis, Part 2: Chemical and Microbiological Properties, ASA, Madison, 891-900.
- Davis, A. R., W. W. Fish & P. Perkins-Veazie, 2003. A rapid spectrophotometric method for analyzing lycopene content in tomato and tomato products. Postharvest Biology and Technology, 28: 425-430. https://doi.org/10.1016/S0925-5214(02)00203-X
- Dube, B. K., P. Sinha & C. Chatterjee, 2003. Effect of zinc on yield and quality of tomato. Indian Journal of Horticulture, 60: 59-63.
- Dumas, Y., M. Dadomo, G. Di Lucca & P. Grolier, 2003. Effects of environmental factors and agricultural techniques on antioxidant content of tomatoes. Journal of the Science of Food and Agriculture, 83: 369-382. https://doi.org/10.1002/jsfa.1370
- Ejaz, M., R. Waqas, M. Butt, S. U. Rehman & A. Manan, 2011. Role of macro-nutrients and micro-nutrients in enhancing the quality of tomato. International Journal of Agriculture and Veterinary Sciences, 5: 401-404.
- FAOSTAT, 2020. FAOSTAT Statistics. (Web page: http://www.fao.org/faostat/en/#data/QC/visualize) (Date accessed: 24 March 2020).
- Foolad, M. R., 2007. Genome mapping and molecular breeding of tomato. International Journal of Plant Genomics, 1-52. https://doi.org/10.1155/2007/64358
- Fridman, E., T. Pleban & D. Zamir, 2000. A recombination hotspot delimits a wild-species quantitative trait locus for tomato sugar content to 484 bp within an invertase gene. Proceedings of the National Academy of Sciences (PNAS), 97: 4718-4723. https://doi.org/10.1073/pnas.97.9.4718
- Grandillo, S., D. Zamir & S. D. Tanksley, 1999. Genetic improvement of processing tomatoes: A 20 years perspective. Euphytica, 110: 85-97. https://doi.org/10.1023/A: 1003760015485
- Gurmani, A. R., S. U. Khan, R. Andaleep, K. Waseem & A. Khan, 2012. Soil application of zinc improves growth and yield of tomato. International Journal of Agriculture & Biology, 14: 91-96.
- Haleema, B., A. Rab & S. A. Hussain, 2018. Effect of calcium, boron and zinc foliar application on growth and fruit production of tomato. Sarhad Journal of Agriculture, 34: 19-30.
- Harris, K. D. & V. Mathuma, 2015. Effects of foliar application of boron and zinc and their combinations on the quality of tomato (Lycopersicon esculentum Mill.). European Academic Research, 3: 1097-1112.
- Horneck, D. A., J. M. Hart, K. Topper & B. Koepsell, 1989. Methods of Soil Analysis Used in the Soil Testing Laboratory at Oregon State University.
- Kacar, B., 2009. Toprak analizleri. Nobel Yayın Dağıtım, Ankara, 467 s.
- Kazemi, M., 2013. Effects of Zn, Fe and their combination treatments on the growth and yield of tomato. Bulletin of Environment, Pharmacology. Life Sciences, 3: 109-114.
- Lindsay, W. L. & W. Norvell, 1978. Development of a DTPA soil test for zinc, iron, manganese, and copper. Soil Science Society of America Journal, 42: 421-428.
- Marschner, H., 2012. Marschner's Mineral Nutrition of Higher Plants, 3rd Edition, Elsevier/Academic Press. https://doi.org/10.1016/C2009-0-63043-9
- Martin, A. E. & R. Reeve, 1955. A rapid manometeic method for determining soil carbonate. Soil Science, 79: 187-198.
- McGuire, G. R., 1992. Reporting of objective color measurements. HortScience, 27: 1254-1255. https://doi.org/10.21273/HORTSCI.27.12.1254
- Mousavi, S. R. 2011. Zinc in crop production and interaction with phosphorus. Australian Journal of Basic and Applied Sciences, 5: 1503-1509.
- Nas, Y., B. Türk, İ. Duman, F. Şen & Ö. Tuncay, 2018. The effect of different type soils on fruit pH, yield and some quality properties in processing tomato production. Journal of Agriculture Faculty of Ege University, 55: 311-317. https://doi.org/10.20289/zfdergi.394142
- Nas, Y., İ. Duman & M. A. Ul, 2017. The influence of final irrigation treatments on yield and fruit quality for processing tomatoes cultivated in different soil types. Journal of Agriculture Faculty of Ege University, 54: 223-230. https://doi.org/10.20289/zfdergi.387334
- Nawaz, H., M. Zubair & H. Derawadan, 2012. Interactive effects of nitrogen, phosphorus and zinc on growth and yield of tomato (Solanum lycopersicum). African Journal of Agricultural Research, 7: 3792-3769.
- Olsen, S. R., 1954. Estimation of available phosphorus in soils by extraction with sodium bicarbonate (No. 939). US Department of Agriculture.
- Prasad, P. S., C. T. Subbarayappa, A. Sathish, & V. Ramamurthy, 2021. Impact of zinc fertilization on tomato (Solanum lycopersicum L.) yield, zinc use efficiency, growth and quality parameters in Eastern Dry Zone (EDZ) soils of Karnataka, India. International Journal of Plant & Soil Science, 33: 20-38.
- Ronga, D., E. Francia, F. Rizza, F. W. Badeck, F. Caradonia, G. Montevecchi & N. Pecchioni, 2019. Changes in yield components, morphological, physiological and fruit quality traits in processing tomato cultivated in Italy since the 1930’s. Scientia Horticulturae, 257: 108726. https://doi.org/10.1016/j.scienta.2019.108726
- Saravaiya, S. N., P. B. Jadhav, S. S. Wakchaure, N. B. Harad, N. B. Patil, S. S. Dekhane & D. J. Patel, 2014. Influence of foliar application of micronutrients on tomato (Lycopersicon esculentum Mill.) cv." Gujarat Tomato 2". International Journal of Tropical Agriculture, 32: 451-458.
- Shnain, R. S., V. M. Prasad & S. Saravanan, 2014. Effect of zinc and boron on growth, yield and quality of tomato (Lycopersicon esculentum. Mill) cv. Heem Sohna, under protected cultivation European Academic Research, 2: 78-79.
- Singh, B., S. Kasera, S. K. Mishra, S. Roy, S. Rana & D. Singh, 2017. Growth, yield and quality of cherry tomato (Lycopersicon esculentum var. cerasiforme) as influenced by foliar application of zinc and boron. Journal of Pharmacognosy and Phytochemistry, 6: 911-914.
- Soil Survey Division Staff, 1993. Soil Survey Manual. Soil Conservation Service, U.S. Department of Agriculture Handbook 18, Chapter 3.
- Sultana, S., H. M. Naser, S. Akhter & R. A. Begum, 2016. Effectiveness of soil and foliar applications of zinc and boron on the yield of tomato. Bangladesh Journal of Agricultural Research, 41: 411-418. https://doi.org/10.3329/bjar.v41i3.29712
- Swetha, K., S. Saravanan & L. N. Banothu, 2018. Effect of micronutrients on fruit quality, shelf life and economics of tomato (Solanum lycopersicum L.) cv. Pkm-1. Journal of Pharmacognosy and Phytochemistry, 7: 3018-3020.
- Ullah, R., G. Ayub, M. Ilyas, M. Ahmad, M. Umar, S. Mukhtar & S. Farooq, 2015. Growth and yield of tomato (Lycopersicon esculentum L.) as influenced by different levels of zinc and boron as foliar application. American-Eurasian Journal of Agricultural & Environmental Sciences, 15: 2495-2498.
- Vural, H., D. Eşiyok & İ. Duman, 2000. Culture Vegetables: Vegetable Growing (in Turkish). Ege University Printing House, İzmir.
- Walkley, A. & I. A. Black, 1934. An examination of the degtjareff method for determining soil organic matter, and a proposed modification of the chromic acid titration method. Soil Science, 37: 29-38.