Agromisa receives many questions about agricultural problems that directly or indirectly involve soil fertility problems. Often crop returns have decreased, so farmers want to know how to regain previous harvest levels. Lack of soil fertility causes decreased yields but many plant diseases are also related to poor soil fertility | Agrodok 2 Soil fertility management Laura van Schöll Rienke Nieuwenhuis Agromisa Foundation Wageningen 2004. All rights reserved. No part of this book may be reproduced in any form by print photocopy microfilm or any other means without written permission from the publisher. First english edition 1986 Third revised edition 1998 Fourth edition 2004 Authors Laura van Schöll Rienke Nieuwenhuis Illustrators Barbera Oranje Daniel van Buren Translation Catharina de Kat-Reynen Printed by Digigrafi Wageningen the Netherlands ISBN 90-77073-03-5 NUGI 835 Foreword Special thanks go first and foremost to Rob Leijder Stephan Mantel and Jan Vlaar for their invaluable comments. Further thanks go to the illustrators Barbera van Oranje and Daniel van Buren. This Agrodok is a revised edition which incorporates two previously published Agrodoks Agrodok 2 Soil Fertility and Agrodok 28 Green Manures . These were combined because they can t be dealt with separately green manures offer the small-scale farmer extra opportunities to improve soil fertility. In addition to animal manure and chemical fertiliser crop husbandry measures such as the use of green manure are important in combatting soil fertility problems. Agromisa publishes a whole series of Agrodoks. In addition to ordering Agrodoks you can correspond directly with Agromisa s Question and Answer Service to get advice about specific problems relating to agriculture. Rienke Nieuwenhuis Laura van Schöll October 1998 Foreword
