Please use this identifier to cite or link to this item: http://hdl.handle.net/10174/3182

Title: Evaluation of variable rate technology for fertilizer application in permanent pastures
Authors: Serrano, João
Peça, José
Shahidian, Shakib
Keywords: Calibration
Evaluation
Variable rate technology
Issue Date: Aug-2011
Publisher: David Publishing
Citation: Serrano, J. M.; Peça, J. O.; Shaidian, S. (2011). Evaluation of variable rate technology for fertilizer application in permanent pastures. Journal of Agricultural Science and Technology A, Volume 1, Number 4, August 2011, 1(4), 489-499. (ISSN 2161-6256, USA)
Abstract: This paper describes the field tests that evaluate a new centrifugal fertilizer distributor Vicon RS-EDW to be used in Precision Agriculture. The results of dynamic calibration tests show a significant and systematically difference between the application rates of the two discs (about 20%). This difference had to be corrected by the manufacturer that made the necessary changes in the electric actuators. The fertilizer spreader had good distribution homogeneity, considering different working velocities and different positions in the parcel. The pattern distribution curve for 18% Super phosphate fertilizer led to an effective working width of 28 meters, with a coefficient of variation of 15%. The longitudinal test, under experimental working conditions led to a machine delay time of 6-7 seconds. The obtained results show an actual fertilization application density between 74-90% of that determined for each location. These results make it possible to confirm that the spreader can be used to spread any fertilizer differentially in the field.
URI: http://hdl.handle.net/10174/3182
Type: article
Appears in Collections:ERU - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica
ICAAM - Publicações - Artigos em Revistas Internacionais Com Arbitragem Científica

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