TY JOUR TI GROWTH REGULATOR «RIBAV-EXTRA» INFLUENCE ON HEAVY METALS TOXICITY DEGREE FOR TEST-PLANTS KW heavy metals KW lead KW copper KW cadmium KW cucumber KW «Ribav-extra» preparation KW seed sowing qualities KW bio-stimulator KW length of sprouts and roots KW biometric indices KW test-plant JO Bulletin of KSAU AU Korotchenko, I.S. AU Kiriyenko, N.N. PY 2013 IS PB Krasnoyarsk State Agrarian University