In This Chapter

Bioavailability of N, P, K, Ca, Mg, S, Si, and Micronutrients

Authored by: Nanthi Bolan , Ross Brennan , Dedik Budianta , James J. Camberato , Ravi Naidu , William L. Pan , Andrew Sharpley , Donald L. Sparks , Malcolm E. Sumner

Handbook of Soil Sciences Resource Management and Environmental Impacts

Print publication date:  November  2011
Online publication date:  November  2011

Print ISBN: 9781439803073
eBook ISBN: 9781439803080
Adobe ISBN:


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The focus of this chapter is to illustrate how the fundamental transformations and transport of nitrogen (N) in the soil alter its bioavailability and impact plant productivity and environmental quality. Nutrient bioavailability or availability can be defined in many ways. Of the 10 definitions described by Blackmer (1999), that of Peck and Soltanpour (1990, p. 4) is most appropriate to this chapter: “By plant-available nutrient, one usually means the chemical form or forms of an essential plant nutrient in the soil whose variation in amount is reflected in variations in plant growth and yield.”

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