EurekaMag
+ Most Popular
Cunninghamia lanceolata plantations in China
Mammalian lairs in paleo ecological studies and palynology
Studies on technological possibilities in utilization of anhydrous milk fat for production of recombined butter-like products
Should right-sided fibroelastomas be operated upon?
Large esophageal lipoma
Apoptosis in the mammalian thymus during normal histogenesis and under various in vitro and in vivo experimental conditions
Poissons characoides nouveaux ou non signales de l'Ilha do Bananal, Bresil
Desensitizing efficacy of Colgate Sensitive Maximum Strength and Fresh Mint Sensodyne dentifrices
Administration of fluid by subcutaneous infusion: revival of a forgotten method
Tundra mosquito control - an impossible dream?
Schizophrenia for primary care providers: how to contribute to the care of a vulnerable patient population
Geochemical pattern analysis; method of describing the Southeastern limestone regional aquifer system
Incidence of low birth weights in a hospital of Mexico City
Tabanidae
Graded management intensity of grassland systems for enhancing floristic diversity
Microbiology and biochemistry of cheese and fermented milk
The ember tetra: a new pygmy characid tetra from the Rio das Mortes, Brazil, Hyphessobrycon amandae sp. n. (Pisces, Characoidei)
Risk factors of contrast-induced nephropathy in patients after coronary artery intervention
Renovation of onsite domestic wastewater in a poorly drained soil
Observations of the propagation velocity and formation mechanism of burst fractures caused by gunshot
Systolic blood pressure in a population of infants in the first year of life: the Brompton study
Haematological studies in rats fed with metanil yellow
Studies on pasteurellosis. I. A new species of Pasteurella encountered in chronic fowl cholera
Dormancy breaking and germination of Acacia salicina Lindl. seeds
therapy of lupus nephritis. a two-year prospective study

Development of a variable rate applicator for uniform fertilizer spreading


Development of a variable rate applicator for uniform fertilizer spreading



International Journal of Agricultural and Biological Engineering 12(2): 82-89



ISSN/ISBN: 1934-6344

Environmental impact and economic concerns have driven a variable rate technology (VRT). Spinner spreaders were mainly used for granular fertilizer application since they are simple in design, inexpensive, and can cover large areas. However, the spreader was not adequate for VRT because uniformity changes drastically while varying application rates. Thus, the purpose of this study was to develop a variable rate applicator with uniform spreading patterns. A commercial spreader was modified with a controller and electric actuators for controlling fertilizer discharge directions and amounts. Database was established to determine the optimum discharge direction according to the fertilizer application amount. The uniformity of spreading patterns in accordance with the spread amount per set unit area was evaluated by the statistical coefficient of variation (CV) lower than 15% is assumed to prevent damage to the crop. Test results showed that CVs were 8%, 9%, and 8%, respectively, for a tractor in race track mode (adjacent passes in same direction of travel) at 200 kg/hm(2), 300 kg/hm(2), and 400 kg/hm(2). This indicates that the fertilizer was spread uniformly, while the coefficient of variation was 12% at 200 kg/hm(2) in back and forth mode (adjacent passes in the opposite direction of travel). Overall, the results suggest that the race track mode is suitable for operation of a tractor to ensure uniform spreading of fertilizer when applying at variable rates. The future goal is to establish a system for automatic variable rate application according to location in connection with soil analysis and geographic information systems.

Please choose payment method:






(PDF emailed within 1 workday: $29.90)

Accession: 070918463

Download citation: RISBibTeXText

Related references

Comparison of uniform and variable rate fertilizer applications using a variable rate liquid applicator. ASAE/CSAE SCGR Annual International Meeting, Toronto, Ontario, Canada, 18-21 July, 1999: 12 pp., 1999

Numerical simulation of spreading performance and distribution pattern of centrifugal variable-rate fertilizer applicator based on DEM software. Computers and Electronics in Agriculture 144: 249-259, 2018

Development and application of a variable rate fertilizer applicator for precision agriculture. Transactions of the Chinese Society of Agricultural Engineering 19(1): 129-131, 2003

Development of Variable Rate Granule Applicator for Environment-Friendly Precision Agriculture(Ⅰ) -Concept Desine of Variable Rate Pneumatic Granule Applicator and Manufacture of Prototype -. Journal of Biosystems Engineering 31(4), 2006

Performance assessment and model development of a variable-rate, spinner-disc fertilizer applicator. Transactions of the ASAE 44(5): 1071-1081, 2001

Development of a Variable Rate Granule Applicator for Environment-Friendly Precision Agriculture (Ⅲ) -s of Pneumatic Conveying System and Improvement of Fertilizer Applicationmity -. Journal of Biosystems Engineering 31(6), 2006

Maize Crop Coefficients Under Variable and Fixed (Uniform) Rate IRRIGATION AND CONVENTIONAL AND VARIABLE RATE FERTILIZER MANAGEMENT IN THREE SOIL TYPES. Agricultural Water Management 243: 106489, 2021

Development of a Variable Rate Granule Applicator for Environment-Friendly Precision Agriculture (Ⅱ) -ment of Pneumatic Fertilizer Blow Head and Its Application Uniformity. Journal of Biosystems Engineering 31(6), 2006

Design of variable rate fertilizer applicator. Nongye Jixie Xuebao = Transactions of the Chinese Society of Agricultural Machinery 36(1): 50-53, 2005

A Novel Variable Rate Pneumatic Fertilizer Applicator. Instrumentation Science and Technology 42(4): 369-384, 2014

Design and experiment of variable rate fertilizer applicator. Transactions of the Chinese Society of Agricultural Engineering 20(5): 114-117, 2004

Sensor-based variable rate fertilizer applicator. Research report P 96 8-9, 1995

A Study on the Time Lag and Compensation of a Variable-Rate Fertilizer APPLICATOR. Applied Engineering in Agriculture 37(1): 43-52, 2021

Nitrogen and phosphorous management using a variable rate liquid fertilizer applicator. ASAE Annual International Meeting, Orlando, Florida, USA, 12-16 July, 1998: 12 pp., 1998

Field evaluation of a spinner disc variable-rate fertilizer applicator. ASAE/CSAE SCGR Annual International Meeting, Toronto, Ontario, Canada, 18-21 July, 1999: 19 pp., 1999