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【分享】Trees, Crops, and Soil Fertility Concepts and Research Methods
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Foreword Soil science benefits from the availability of a wide array of practicable methods. There are a number of very useful compendia in which sets of these methods are collected together to provide easy reference for the intending practitioner. The need for yet another handbook might therefore be questioned. This book, however, fulfils several needs that are not met in previous volumes. First and foremost it is unique in its format and purpose – being not a compendium of protocols but a reasoned discussion of the value and utility of different methods. Major advances in science are dependent on, and sometimes even driven by, the availability of suitable methods by which key questions or hypotheses may be answered. Progress may be said to be a product of the match between developments in concept and those in technique. The structure and content of this book are designed to review the ways in which current thinking in terms of the major problems of soil fertility can be methodologically attacked. As such the book should be useful not only in helping to solve problems but also in provoking new questions. The book is written within a particular context – soil fertility development under agroforestry. At first this may seem very specific and thus limited in appeal and application. But over the last decade or so agroforestry research has been one of the most influential in developing new insights into soil biology and fertility and thus provides a very suitable framework for review of progress. Furthermore, the influence of trees on soil is profound and of significance beyond agroforestry systems, so the book is likely to be of interest in the wider spheres of agriculture, forestry and ecological sciences. The book covers a spectrum of soil methods broader than most soil science handbooks, combining the techniques of soil chemistry and physics with a wide scope of biological approaches and aspects of social science. This is reflective of the ways in which soil research has moved beyond its strict reductionist paradigm to embrace a more holistic and ecosystematic approach. The book comes at an appropriate time to review the progress of both concept and method in the slow march towards an integrated approach to land management. It should not only serve the purpose of directing enquiring researchers towards the useful approaches but also act as a stimulus for the next wave of soil fertility research. Mike Swift TSBF, Nairobi, Kenya Download link：http://www.isload.com.cn/store/bo4avfghdg48k [ Last edited by ewigkeit on 2008-11-29 at 13:04 ] |
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