Funding for this research was provided by:
Text and Data Mining valid from 2018-09-04
Received: 31 May 2018
Accepted: 13 August 2018
First Online: 4 September 2018
Compliance with ethical standards
: A.C., J.F., and S.H. are co-applicants on the patent (PCT/EP2013/069899) describing the use of chlorophyll a fluorescence to determine the nutritional status of plants, and are founders of the university spin-out SpectraCrop IVS, marketing a hand-held device for predicting the P status of plants. For this reason, there may be a conflict of interest in order to show that the developed P model is able to predict the P status of barley leaves under field conditions. It should be noted that similar OJIP transients, as the ones recorded in this study, can be obtained by a broad range of standard chlorophyll a fluorescence instruments, including Photon Systems Instruments (PSI), Walz, Hansatech, Opti Sciences, Phenospex and MultispeQ.