00626naa#a2200193#i#450# EN\\bibl\94461 20260220175527.5 1819-4036 20231124b2023####ek#y0engy0150####ca RU PHOTOMETRIC EXPRESS DIAGNOSTICS OF NITROGEN NUTRITION OF PLANTS Journal article Krasnoyarsk Krasnoyarsk State Agrarian University 2023 7 с. Journal article local Полеводство. 633 Trubnikov Yuriy Nikolaevich Shpedt Aleksandr Arturovich Solomennikova Yuliya Nikolaevna vestnik.kgau.ru