Nitrogen Cycle

  • PDF Preview of Photo Challenge for Food for the Soil
    Look at four photos or illustrations from “Food for the Soil” and use what you’ve learned to explain what each…
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    eyeChallenge – Food for the Soil

  • The cover of the article "Food for the Soil" featuring a photo of Dr. David D'Amore standing in a forest.
    In this article, learn about soils and the amount of salmon-derived nutrients (SDN) in Southeast Alaska! Salmon-derived nutrients are nutrients…
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    Food for the Soil: Soil and the Amount of Salmon-Derived Nutrients in Southeast Alaska

  • The cover of "It's a Gas: The Exchange of Gases Between the Soil and the Atmosphere" featuring a black and white drawing of a person looking at a cow through a magnifying glass.
    Tropical forests are sometimes cut down so that humans can use the trees for wood and other products. Then, the cleared land is made into…
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    It’s a Gas! The Exchange of Gases Between the Soil and the Atmosphere

  • The cover of "It's a Gas: The Exchange of Gases Between the Soil and the Atmosphere" featuring a black and white drawing of a person looking at a cow through a magnifying glass.
    Tropical forests are sometimes cut down so that humans can use the trees for wood and other products. Then, the cleared land is made into…
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    It’s a Gas! The Exchange of Gases Between the Soil and the Atmosphere (Spanish)

  • Cover image for Natural Enquirer Tropical Forest Edition, Volume 3, Number 1 that shows the article names with accompanying graphics.
    Enjoy a journey to the tropics! In the Natural Inquirer Tropical Forest edition, readers will learn about the plants and…
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    Tropical Forest – Vol. 3 No. 1

  • Front cover of National Inquirer with a stream and mountains, and a cutout photo of a salmon leaping
    Learn about soils and the amount of salmon-derived nutrients (SDN) in Southeast Alaska! Salmon-derived nutrients are nutrients in the soils…
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    Food for the Soil – Vol. 1 No. 6

  • Front cover of "It's a Gas: The Exchange of Gases Between the Soil and the Atmosphere" featuring a boy looking through a magnifying glass at cows releasing gas
    People use land for many different reasons. Is the natural exchange of gases different between types of land uses? The…
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    It’s a Gas! Climate Change Monograph Series – Vol. 1 No. 1

  • The cover for the Tropical Forest edition in Spanish
    Enjoy a journey to the tropics! In the Natural Inquirer Tropical Forest edition, readers will learn about the plants and…
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    Tropical Forest – Spanish