Nitrogen Use Efficiency, Nitrogen Fertilizers, NUE, Nitrogen and the EnvironmentNitrogen Cycle

Nitrogen Cycle NUENitrogen Cycle NinjaLightning, Nitrogen

N Cycle
N Cycle Animated
N Cycle, Dr. Robert Mullen
N Cycle (dial)

Nitrogen Cycle Poem (2014)
Carbon-Nitrogen Cycles, SOIL 5813 Class


2015, USA  (source USDA ISSN 1949-1522)
Population 323 million
Cattle Inventory 95 million
Corn 88.9 million
Soybean 85.1 million
Wheat 56.1 million
Cotton 9.0 million

World Nitrogen Use Efficiency for Cereal Production is 33%,
Agronomy Journal 91:357

NITROGEN Publications from Oklahoma State University

Oklahoma State University, NUE Raun et al. (1997). Nitrogen cycle ninja, a teaching exercise. J. Nat. Resour. Life Sci. Educ. 26:39-42 (pdf). 
Nitrogen Cycle Simplified   Nitrogen Cycle and Global Warming  Nitrogen Cycle and Global Warming, Bumper Sticker