The many billions of dollars invested in canal irrigation in recent decades have had disappointing results. Rarely have projected benefits in well-being or production been achieved. In consequence, in the mid-1980s, further vast sums are being spent throughout the Third World on programmes for rehabilitation, canal lining, on farm development, and farmers' organisation. In this book, Robert Chambers shows that much of this policy and practice is based on misleading research and misdiagnosis. When applied to the complexity and uniqueness of canal irrigation systems, the normal professionalism of civil and agricultural engineers, agronomists, economists, and sociologists, leaves gaps which are keys to better performance. In successive chapters, five such gaps are analysed and presented: main system management, including the scheduling and delivery of water, and communications; canal irrigation at night; management of canal systems jointly by farmers and officials; professional conditions and incentives for irrigation managers; and methods for diagnostic analysis to identify cost-effective actions for improvement. Managing Canal Irrigation has been written for policy-makers, irrigation managers, consultants, researchers, trainers and teachers. It challenges all concerned with improving the performance and anti-poverty impact of canal irrigation, whether in government departments, aid agencies, consultancy firms, training and research institutes or universities, to re-examine their beliefs, biases and actions. By going beyond the limits of normal professionalism, the book presents a new syllabus for training, a new agenda for research and development, and points to new policies and to practical action to be taken in the field.

This textbook addresses the main economic principles required by agricultural economists involved in rural development. The principles of 'micro-economics' or 'price-theory' are of relevance to economists everywhere, but this book reinforces the message of their relevance for rural development by explaining the theory in the specific context of the agricultural and food sectors of developing countries. Hypothetical and actual empirical illustrations drawn almost exclusively from such countries distinguish this book from other economic principles texts that draw their examples almost invariably from industrialised countries, and also from books more oriented to the issue of rural development. The first half of the book deals with the underlying principles of production, supply and demand. These are essential tools for the study and management of the agricultural sector and food markets. In the second half, supply and demand are bought together into a chapter of equilibrium and exchange. This is followed by chapters on trade and the theory of economic welfare. In the final chapter it is shown that much of the material in the earlier chapters can be combined by agricultural economists into a system for analysing and comparing the effects of alternative agricultural policies. The ability of agricultural economics to provide a consistent framework for the analysis of policy problems thus enables it to make a key contribution to rural development.

Farmers all over the world have to decide what to produce and how to go about it. In the tropics, small farmers have to work with a limited resource-base which usually does not lead itself to highly productive systems of consistent crop and animal production. Yet those people who live in developing tropical countries should be concerned that their farmers do produce more from the limited resources with which they have to work. The principles of farm management economics and the applications of the tools and techniques of farm management analysis and planning can help small farmers in tropics to produce ‘a bit more’ from their lot. For the benefit of teachers and students of agriculture, farm extension advisors and agricultural planners and managers, this book sets out the principles and practices of farm management economics on small holdings in the tropics in a clear, simple, useful and usable way.

Silviculture in tropical forests has a long history going back many centuries and active management for timber production began about two hundred years ago. There is therefore a considerable body of evidence regarding both sustainable and destructive forestry practices in these forests, the future of which is the subject of one of the great scientific and public debates of the late twentieth century. Based on fifty years experience by each author and extensive research of the literature, this book provides information, much of which was previously not widely available, on the development of silvicultural systems in tropical moist forest (a broad term which encompasses many forest types). The book begins by tracing the early history and goes on to describe the later, more technical phases and the growth of global exploitation. Examples from many countries are described in detail, considering all aspects including the economic, ecological and social implications. It is the aim of the authors to demonstrate that sustainable timber production in many of these forests is not only possible, but the techniques necessary have been known to foresters for many decades. This book is essential reading for forest managers in the tropics, advanced students and researchers in forestry and ecology concerned with natural resource management and will also be of interest to economists, policy makers and environmentalists

Soilborne diseases have, until recently, received less attention than plant diseases affecting the shoot and foliage. However, this is not a reflection of their economic importance, but rather of difficulties in investigating and detecting pathogens below soil level. Many soilborne diseases are stress related and it is in the tropics where crop growth is particularly limited by environmental stress, predisposing crops to infection by soilborne pathogens. There is thus a great need for information on soilborne diseases of crops in the tropics. This book aims to fill this need by providing reviews of relevant research. It covers the major tropical crops and also includes general chapters on principles, ecology and control. Written by leading research workers from countries including the UK, USA, Australia and India, it will be indispensable for plant pathologists working in this area.

Parasitic weeds of the families Cuscutaceae, Orobanchaceae and Scrophulariaceae are considered to be among the major problems facing agriculture in the Tropics and Subtropics. In the last decades, enormous efforts have been made and success achieved by scientists all over the world in gaining a better understanding of their biology and ecology as well as of control methods. However, no substantial reduction of infestation has been achieved in the past and control strategies specific to the different parasites, crops and farming systems must be further developed or adapted and realised among a wider farming population with suitable extension methods. This `Technical Manual' provides up-to-date methodologies for various aspects of research and extension related to parasitic weed species of the genera Striga, Alectra, Orobanche and Cuscuta. It has the intention to support scientists and extension workers of international and national research and extension institutes and universities, who are either new to the subject or plan to apply further techniques they are not yet familiar with.

The management of tropical forest ecosystems is essential to the health of the planet. This book addresses forest insect pest problems across the world's tropics, addressing the pests' ecology, impact and possible approaches for their control. Fully updated, this second edition also includes discussions of new areas of interest including climate change, invasive species, forest health and plant clinics. This work is an indispensible resource for students, researchers and practitioners of forestry, ecology, pest management and entomology in tropical and subtropical countries.

This book provides an insight into the background, lessons learned, and the methodology of facilitating the application of best-bet/best-fit agricultural technologies to smallholder farms in East and Southern Africa (ESA). All technologies highlighted within this book, except those on livestock feeding, were trialed and demonstrated in farmers' fields over an eight-year period [2012 - 2020] as part of the Feed the Future/USAID funded research-for-development Africa RISING ESA Project and supported by the CGIAR. The livestock feed technologies were compiled from Eastern Africa literature and included to offer a full set of technologies relevant for farmers in mixed farming systems. Topics covered include the introduction of resilient and nutrient-dense crops, better arrangement of crops in the field to amplify intercrop benefits, and the management of soils to improve soil fertility and minimize physical soil and nutrient loss. The publication also features technologies for postharvest loss reduction, livestock feeding, food processing, and in the later chapters, important expositions on how multiple technologies can be creatively integrated in a farming system and how key products of research can be taken to scale. In the first chapter and throughout the handbook, the importance of taking gender dynamics into account to ensure technologies produce equitable outcomes is emphasized. This book: provides evidence-based descriptions of sustainable agricultural intensification technologies that have been validated iteratively with smallholder farmers. a convenient, easy-to-read, and science-based 'how-to' guide for successful deployment of improved agricultural technologies that will ensure readers from development/scaling agencies save time and resources for research trials and instead focus on technology deployment. gives evidence of how building research and development partnerships can be a critical element for successful delivery and scaling up of agricultural technologies. The book is aimed primarily at development practitioners who seek new competences in taking new technologies to scale. However, the breadth of topics covered makes this book an essential resource for agricultural scientists as well as university and college students aspiring to apply systems thinking in future agricultural research and development work.

The management of tropical forest ecosystems is essential to the health of the planet. This book addresses forest insect pest problems across the world's tropics, addressing the pests' ecology, impact and possible approaches for their control. Fully updated, this second edition also includes discussions of new areas of interest including climate change, invasive species, forest health and plant clinics. This work is an indispensible resource for students, researchers and practitioners of forestry, ecology, pest management and entomology in tropical and subtropical countries.

Written in an easily-accessible style, this book provides a practical introduction to all aspects of tropical turf management. General topics covered include climate adaptation, the physiology and morphology of turf-grasses, an overview of the different turf-grass species, soil characteristics and testing, establishment techniques, cultivation, nutrition and fertilization, mowing procedures, irrigation requirements, compaction and thatch, and turf pests. It also discusses golf-course maintenance including the different methods needed for the tee, the fairway, the putting green and the rough. The book also looks at sports field management including rugby fields, tennis courts, football and hockey fields, bowling greens and croquet-courts, and playgrounds. Numerous line drawings and photographs are used to illustrate key concepts, processes and relationships.

An outstanding and currently the only comprehensive handbook for the coffee-professional. 40 authors from the leading coffee-growing countries present the most recent technologies applied to coffee husbandry. The book features 900 carefully selected illustrations, 300 of these in full color, which substantiate the written text. The handbook provides basic guidelines and recommendations which are applicable everywhere rather than referring to any specific country. Added to this, the reader will find numerous data tables and an overview of relevant information sources.

Tropical mycology is attracting increasing interest, as the key role of fungi in tropical ecosystems and as pathogens becomes appreciated. This book is the second of two complementary volumes (Volume 1 covers Macromycetes) produced from papers given at the British Mycological Society's symposium held in Liverpool in April 2000. It describes the ecology, biology, economic dimensions and systematics of tropical Macromycetes. Written by experts in their field, the papers have been thoroughly edited and revised.

The first edition of "Tropical Rain Forests: an Ecological and Biogeographical Comparison" exploded the myth of 'the rain forest' as a single, uniform entity. In reality, the major tropical rain forest regions, in tropical America, Africa, Southeast Asia, Madagascar, and New Guinea, have as many differences as similarities, as a result of their isolation from each other during the evolution of their floras and faunas. This new edition reinforces this message with new examples from recent and on-going research.

After an introduction to the environments and geological histories of the major rain forest regions, subsequent chapters focus on plants, primates, carnivores and plant-eaters, birds, fruit bats and gliding animals, and insects, with an emphasis on the ecological and biogeographical differences between regions. This is followed by a new chapter on the unique tropical rain forests of oceanic islands. The final chapter, which has been completely rewritten, deals with the impacts of people on tropical rain forests and discusses possible conservation strategies that take into account the differences highlighted in the previous chapters. This exciting and very readable book, illustrated throughout with color photographs, will be invaluable reading for undergraduate students in a wide range of courses as well as an authoritative reference for graduate and professional ecologists, conservationists, and interested amateurs.

In spite of the extensive attention given by research workers to aphids no comprehensive review has been published covering all aspects of aphid biology. A few small books exist on certain aspects of nomenclature, ecology, physiology and natural enemies. Aphid biology is studied by many specialists, all representing their own area of interest, therefore the only way to present this comprehensive review is by the multi-author approach. This three-volume work is compiled in a similar way to the first books in the series World Crop Pests: Spider Mites. The volumes contain contributions by more than 40 authors. In this first volume an account is given on morphology and systematics, anatomy, genetics, life cycles, ways of life, reproduction and polymorphism and interaction with the environment. These topics are followed by an in-depth study of evolution of aphids, especially in connection with the evolution of plants. In addition processes governing the development of population structure and speciation are elicited.

Mechanization and Maize focuses on several international assistance agencies and on two African countries, Kenya and Tanzania. The technologies considered are improved varieties of maize, the primary East African food crop, and small-and large-scale forms of agricultural mechanization. The book investigates how political and technical forces come together, and draws upon the debate on the Green Revolution.