TY JOUR TI THE ROLE OF ECOLOGICAL FACTORS IN THE CULTIVATION OF ONIONS IN THE PEN CLOSED AGRO-ECOSYSTEMS OF KRASNOYARSK AGGLOMERATION KW onion KW agroecosystems KW environ-mental monitoring KW efficiency KW mineral food KW fertiliz-ers KW Knop solution KW ammofoska KW nitroammofoska (azofoska) KW onions feather length KW onions root length JO Bulletin of KSAU AU Demidenko, G.A. PY 2016 IS PB Krasnoyarsk State Agrarian University