N-Fixers vs. Non-N-Fixers

Natural Disasters
   See Weather Extremes

Natural Variability of Climate
   Centennial Variability
   Decadal Variability
      Arctic
      Asia
      Europe
      General
      North America
      Oceans
         Atlantic
         General
         Pacific
   Millennial Variability
      Africa
      Antarctica
      Arctic
      Asia
      Australia
      Europe
      Forcing Factors
      Hemispheric-to-Global-Scale
      North America
      Oceans
      South America

Nectar

Nitrogen
   Carbon Sequestration
   Cycling
   Deposition
   Productivity
   Progressive Limitation Hypothesis
      Grasslands
      Loblolly Pine
      Miscellaneous

Nitrogen Fixation
   Aquatic Plants
   Herbaceous Plants
   Miscellaneous
   Woody Plants

Nitrogen Use Efficiency

Nitrous Oxide

Nonstructural Carbohydrates

Non-Vascular Plants

North Atlantic Deep Water

Nuclei of Cloud Particles

Nutrient Acquisition

Nutrients x CO2 Effects on Plants
   General
   Iron
   Nitrogen
      Ammonium vs. Nitrate
      Crops: Other
      Crops: Rice
      Crops: Wheat
      Fungi
      General
      Grasses
      Trees: Aspen
      Trees: Other
      Trees: Pine
      Trees: Spruce
   Phosphorus

Nutrition