TY JOUR TI GRAPH-ANALYTIC INTERPRETATION OF RADIATION SOURCE CHARACTERISTICS AND PARAMETERS FOR PLANT CULTIVATION KW photosynthetic flow KW luminous flow KW radiation source JO Bulletin of KSAU AU Kozyreva, I.N. AU Nikitin, V.D. AU Tsuglenok, N.V. PY 2013 IS PB Krasnoyarsk State Agrarian University