Assessing the Potential for Ion Selective Electrodes and Dual Wavelength UV Spectroscopy as a Rapid on-Farm Measurement of Soil Nitrate ConcentrationReport as inadecuate




Assessing the Potential for Ion Selective Electrodes and Dual Wavelength UV Spectroscopy as a Rapid on-Farm Measurement of Soil Nitrate Concentration - Download this document for free, or read online. Document in PDF available to download.

1

School of Environment, Natural Resources and Geography, Bangor University, Gwynedd, LL57 2UW, UK

2

John Innes Centre, Norwich Research Park, Norwich, NR4 7UH, UK





*

Author to whom correspondence should be addressed.



Abstract Current fertiliser recommendations for nitrogen are limited in their accuracy and may be improved by the use of simple on-farm soil rapid tests. This paper investigates the potential for using nitrate NO3− ion selective electrodes ISEs and dual wavelength UV spectroscopy as part of a rapid soil NO3− diagnostic test. Three soil types, representing the major soil types for agriculture in the western UK, were tested. For the three soils, the ISE rapid test procedure gave a near 1:1 response r2 = 0.978, 0.968, 0.989 compared to the internationally-approved standard laboratory method. However, the accuracy of the ISE rapid test was reduced at low soil NO3− concentrations <10 mg NO3− L−1. We also show that NO3− analysis of H2O soil extracts by dual wavelength UV spectroscopy was also highly correlated r2 = 0.978, 0.983, 0.991 to the standard laboratory method. We conclude that both ISE and dual wavelength UV spectroscopy have clear potential to be used for the rapid on-farm determination of soil NO3− concentration. Barriers to use of these field-based assessment tools include, farmer perception of cost-benefit, general attitude to new technologies and the ability to generate useful fertiliser use strategies from soil NO3− measurements. View Full-Text

Keywords: crop nutrients; fertiliser management; nitrogen use efficiency; soil analysis crop nutrients; fertiliser management; nitrogen use efficiency; soil analysis





Author: Rory Shaw 1,* , A. Prysor Williams 1, Anthony Miller 2 and Davey L. Jones 1

Source: http://mdpi.com/



DOWNLOAD PDF




Related documents