Soil spatial variability and site-specific fertilization maps in an apple orchard
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In the present study, the spatial variability of some soil physical and chemical properties in a 0.8 ha apple orchard were studied. Sixty soil samples were taken from two sampling depths: 0–0.3 m and 0.3–0.6 m. The soil samples were analyzed for the following soil properties: soil texture, pH, cation exchange capacity and NO3–N, NH4–N, P, K, Na, Ca, Mg, Fe, Zn, Mn, Cu, B and organic matter content. Data analysis indicated that most of the nutrients were at sufficient levels. The site-specific application map for N was created based on the amount of N that was removed from the soil with the yield of the previous year. By applying N site-specifically, 38% of N could be saved compared to uniform application.
KeywordsMalus * domestica Soil sampling Variograms Fertilization maps Variable rate application
- Brady, C. N. (1984). The nature and properties of soils (Chapter 5, 9th ed.). New York: Macmillan Publishing Co.Google Scholar
- Earl, R., Wheeler, P. N., Blackmore, B. S., & Godwin, R. J. (1996). Precision farming—the management of variability. Landwards, 51(4), 18–23.Google Scholar
- Gemtos, T., Fountas, S., Blackmore, S., Griepentog, H. W. (2002). Precision farming in Europe and the Greek potential. In A. Sideridis & C. Yialouris (Eds.), HAICTA 2002, Proceedings of the 1st Greek conference on information and communication technology in agriculture (pp. 45–55). Athens, Greece: Agricultural University of Athens.Google Scholar
- IFA. (1992). International Fertilizer Association. World Fertilizer Use Manual. Available at http://www.fertilizer.org/ifa/Home-Page/LIBRARY/World-Fertilizer-Use-Manual/by-common-names, last accessed January 2010.
- Koukoulakis, P. (1995). Basic principles of rational fertilization of crops. Crop and Animal Husbandry, 9, 43–61. (in Greek).Google Scholar
- Minasny, B., McBratney, A. B., Whelan, B. M. (2005). VESPER version 1.62. Australian Centre for Precision Agriculture, McMillan Building A05, The University of Sydney, NSW 2006. (http://www.usyd.edu.au/su/agric/acpa, last accessed August 2009).
- Plaster, J. E. (1992). Soil science and management (Chapter 9). Albany, New York: Delmar Publishers Inc.Google Scholar
- Pontikis, K. (2003). Applied pomology (p. 74). Athens, Greece: Stamoulis Publications. (in Greek).Google Scholar
- Sharma, D. D., & Chauhan, J. S. (2005). Effect of different rootstocks on root distribution of apple. Acta Hort, 696, 167–171.Google Scholar
- Vasilakakis, M. (2004). General and specialized pomology (pp. 276–311). Thessaloniki, Greece: Gartaganis Publications. (in Greek).Google Scholar
- Zaman, Q., Schuman, W. A., & Miller, W. M. (2005). Variable rate nitrogen application in florida citrus based on ultrasonically-sensed tree size. Applied Engineering in Agriculture, 21, 331–335.Google Scholar