machines in crop production campbell K. joseph text new york USA international rice research institute 1990 eng

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328 Hlm : ilus ; 23 cm Dibble Sticks, Donkeys, and Diesels: Machines in Crop Pro- duction is a broad study of agricultural mechanization, from simple hand tools to self-propelled harvesters. The book is for the non-agricultural engineer who wants to learn about the wide diversity of power and machines used by farmers to produce our staple food and fiber crops. It provides the reader with information needed to weigh the advantages and disad- vantages of specific types of machines. For example, what are the trade-offs between a pedestrian tractor and a hydrotiller? Why are short-handled hoes used in Africa? For human transport of loads, why is the limber bamboo carrying stick of Asia superior to the rigid poles used in some other countries? The author, Joseph K. Campbell, answers these and many other questions in this survey of technological development in crop production. Over the last 100 years, the shift from muscle to engine power has changed agriculture dramatically. Often ignored, however, is the fact that most of the farmers in the world still depend on animal power as their main source of draft energy. The lessons leamed in recent decades are important to document. We now know that direct transfer of knowledge from one environment to another often leads to wrong solutions to critical problems. At the same time, it is most valuable to know how, when, where, and why technological change took place. With this information, the adaptation of knowledge and the development of technological solutions according to local needs are easier to achieve. Not many people today have the combined skills to compile the kind of information found in this book. Professor Campbell has more than 40 years of worldwide experience in agriculture. He was born into a family of Pennsylvania joseph K. campbell machines in crop production Rak Umum 631.3 631.3 CAM d 971-104-185-5 240729 20240729021801 INLIS000000000001193 Converted from MARCXML to MODS version 3.5 using MARC21slim2MODS3-5.xsl (Revision 1.106 2014/12/19)