Northeast Region Certified Crop Adviser (NRCCA) Study Resources

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In This Section

• Introduction
• PO 7 Variables in supplying nutrients from the soil
• PO 8 Nutrient transformations and interactions
• PO 9 Mass flow, diffusion, root interception
• PO 10 Affects of CEC
• PO 11 Mobile and immobile macronutrients
• PO 12 Soil characteristics and nutrient uptake
• PO 13 Nitrogen cycle
• PO 14 Symbiotic nitrogen fixation
• Summary

Competency Area 2: Basic Concepts of Soil Fertility

Introduction.

Plants take up the majority of their nutrient needs from the soil by utilizing different transport mechanisms. Different characteristics of soils affect their nutrient-holding capacity and which mechanisms work best.

Some macronutrients, particularly nitrogen and phosphorus, cycle between residency in the soil, usage by plants, and air- and water-borne particles. These have important environmental effects, and the actions of these cycles influences crop management.