%0 Journal Article %T PHOTOMETRIC EXPRESS DIAGNOSTICS OF NITROGEN NUTRITION OF PLANTS %A Trubnikov, Y.N. %A Shpedt, A.A. %A Solomennikova, Y.N. %K plant nutrition, crops, photometric diagnostics, N-tester SPAD-502, chlorophyll, nitrogen, correlation %J Bulletin of KSAU %D 2023 %N 0 %P 7 %I Krasnoyarsk State Agrarian University