This book is a revision of the IFA publication “Improving Fertilizer Use Efficiency: Controlled-Release and Stabilized Fertilizers in Agriculture” by the same author, published in 1997. It is intended for use by the fertilizer industry, policy makers and scientists. The main objectives of the book are to:

Provide an up-to-date state of scientific knowledge on issues related to the development, production and use of slow- and controlled-release and stabilized fertilizers;

Explain the importance of slow- and controlled-release and stabilized fertilizers to improve nutrient use efficiency;

Present slow- and controlled-release and stabilized fertilizer products that are currently available;

Assess the current market and prospects for slow- and controlled-release and stabilized fertilizers; and

Discuss the policy and regulatory frameworks needed to maximize the benefits from using slow- and controlled-release and stabilized fertilizers.

This book is a contribution to IFA’s efforts to promote nutrient stewardship through the use of the right product(s) at the right rate, right time and right place (IFA, 2009).