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Curriculum tagged soil health

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Healthy soils

Healthy soils

What makes soil healthy? What methods might farmers use to maintain healthy soil? “Soil” doesn’t just mean “dirt.” It is a mixture of minerals like rocks and clay, organic material like dead leaves, living organisms like worms, microbes, and insects, and even air and wa…

Nitrogen fixation and legumes: say what?

Nitrogen fixation and legumes: say what?

How do legumes fix nitrogen? If the atmosphere is about 80% Nitrogen (N2), but plants cannot use that form, how do they get nitrogen? In this unit, students plant and care for soybeans under one of …