Development of a Row Type Variable Rate Fertilizer Machine and Performance Assessment

Öz

Increasing profitability associated with reduction of environmental pollution and production costs made variable rate application unavoidable. Therefore, fertilizing according to the field demand and ability to vary fertilizer rates on-the-go is regarded as one of the site-specific management tools. Variable rate application machines tend to be more complicated and thus farmers must take into account how reliable the extra components and systems. This study introduces a frugal variable rate granular fertilizer with features of and simplicity that was modified on a row fertilizer machine. Interpolation accuracy, coefficient of variation and response time as parameters to achieve a reliable variable rate fertilizing system were considered in order to evaluate the fertilizer applicator performance. According to the results, when interpolation accuracy was determined as R2, 0,94 the response times of low to high and high to low transition rate orders were estimated as 4,44s and 4,63s taking into account operation speed at 1 ms-1, respectively. Coefficient of variation of fertilizer rates ranged from 6,44 to 26,25% and 10,45 to 81,3 for application rate from 0 to 150 kg/ha. Variation of fertilizer rate among the metering units in terms of coefficient of variation (CV) resulted from 10,11 to 36,15% and 11,15 to 117,89% in increasing and decreasing transition order, respectively.

Anahtar Kelimeler

• Variable rate fertilizer application
• Control system
• İnterpolation
• Response time

Kaynakça

1. Antolini, L. S., Scare, R. f. and Dias, A. 2015. Adoption of precision agriculture technologies by farmers: a systematic literature review and proposition of an integrated conceptual framework. IFAMA World Conference, USA.
2. Azpurua, M. A., & Ramos, K. D. (2010). A comparison of spatial interpolation methods for estimation of average electromagnetic field magnitude. Progress In Electromagnetics Research M, 14, 135-145.
3. Akdemir, B., Aydoğdu, B., Üngör, M,G., Atık, M and Sağlam N. (2018). Variable Rate Fertilizer Control System for Centrifugal Fertilizer Spreaders. Journal of Agricultural Faculty of Gaziosmanpasa University. 35 (3):319-329.
4. Chi, T. T. N., & Yamada, R. (2002). Factors affecting farmers’ adoption of technologies in farming system: A case study in Omon district, Can Tho province, Mekong Delta. Omonrice, 10, 94-100.
5. Ess, D. R., Morgan, M. T., & Parsons, S. D. 2001. Implementing site-specific management: map-versus sensor-based variable rate application. Pub. No. SSM-2-W, Site-Specific Management Center, Purdue University, West Lafayette, IN.
6. Forouzanmehr, E., Loghavi, M. (2012). Design, development and field evaluation of a map-based variable rate granular fertilizer application control system. Agricultural Engineering International: CIGR Journal, 14(4), 255-261.
7. Han, Jun; Morag, Claudio (1995). "The influence of the sigmoid function parameters on the speed of backpropagation learning". In Mira, José; Sandoval, Francisco.From Natural to Artifical Neaural Computation pp.195-201.
8. Hu, J. (1995, May). Methods of generating surfaces in environmental GIS applications. In 1995 ESRI User Conference Proceedings.

9. Jochinke, D. C., Noonon, B. J., Wachsmann, N. G., & Norton, R. M. 2007. The adoption of precision agriculture in an Australian broadacre cropping system—Challenges and opportunities. Field Crops Research, 104(1), 68-76.
10. Kim, Y. J., Kim, H. J., Ryu, K. H., & Rhee, J. Y. (2008). Fertiliser application performance of a variable-rate pneumatic granular applicator for rice production. Biosystems engineering, 100(4), 498-510.
11. Motulsky, H., & Christopoulos, A. 2004. Fitting models to biological data using linear and nonlinear regression: a practical guide to curve fitting. Oxford University Press.
12. Pierpaoli, E., Carli, G., Pignatti, E., & Canavari, M. (2013). Drivers of Precision Agriculture Technologies Adoption: A Literature Review. Procedia Technology,8, 61-69.
13. Robertson, M. J., Llewellyn, R. S., Mandel, R., Lawes, R., Bramley, R. G. V., Swift, L., ... & O’Callaghan, C. 2012. Adoption of variable rate fertiliser application in the Australian grains industry: status, issues and prospects. Precision Agriculture, 13(2), 181-199.
14. Shepard, D. 1968, January. A two-dimensional interpolation function for irregularly-spaced data. In Proceedings of the 1968 23rd ACM national conference (pp. 517-524). ACM.
15. Talha, Z., Tola, E., Al-Gaadi, K. A., & Kheiralla, A. F. (2011). Pneumatic System for Granular Fertilizer Flow Rate Control. Middle-East Journal of Scientific Research, 8(3), 688-693.