N-15
preferred label: نیتروژن 15 @fa
type: Concept
broader: nitrogen

fertilizer
preferred label: کود شیمیایی @fa
type: Concept
related: nitrogen

critical load
preferred label: بار بحرانی @fa
type: Concept
related: nitrogen

nitrogen
type: Concept
preferred label: نیتروژن @fa
related: chemical element
related: soil
related: nitrite ion
related: fertilizer
related: nitrification
related: critical load
narrower: N-15/N-14
narrower: N-15

chemical element
preferred label: عنصر شیمیایی @fa
type: Concept
related: nitrogen

N-15/N-14
preferred label: نسبت نیتروژن 15 به نیتروژن 14 @fa
type: Concept
broader: nitrogen

nitrification
preferred label: نیترات‌گیری @fa
type: Concept
related: nitrogen

soil
preferred label: خاک @fa
type: Concept
related: nitrogen

nitrite ion
preferred label: یون نیتریت @fa
type: Concept
related: nitrogen