W. Johnson, B.J. Lamp, ,Principles, equipment and systems for corn harvesting (1966) Agric....
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J. agric. Engng, Res. (1967) 12 (2) 171-172 BOOK REVIEWS Johnson, w.,o Lamp, B. J. Principles, equipment and systems for com harvesting. Agric. Consulting Associates, Wooster, Ohio, 1966, pp. 360, iUus. The authors have brought together much existing information, evaluated, summarized and in a general sense integrated it into system evaluations. Some production statistics and other crop data are given and the physical, physicomechanical and other engineering properties of the crop indicated. The characteristics of the standing crop, the effect of mechanical action, such as shelling, on kernel crackage, shelling percentage, yield when harvesting at different m.c., bulk density, etc. are examined. The major part of the book is devoted to field machinery used for harvesting and processing the crop, dealing with machinery costs, capacity and power require- ments, functional requirements, machine components and their performance. The effects of weather on harvesting, harvesting efficiency and losses are also considered. Information is given on maize driers, both mobile and stationary, the relationships governing the drying process, drying costs and storage of maize. System analyses are made, with cost as the primary criterion, but taking into consideration the ultimate use for the product, labour and capital available, existing machines and structures, maximum quantity harvested, etc. A final chapter deals with the measurement of factors related to maize condition and the instruments required. The book has many good illustrations and extensivelists of references.-E.H. Henderson, S. M,; Perry, R. L. Agricultural process engineering. Agricultural Experiment Station, University of California, 1966, pp. 430 An interval of 11 a has passed since the publication of the first edition of this book during which many developments in the basic mechanisms and useful applications relative to process engineering have taken place. These changes are reflected by additional material in the second edition. Agricultural processing is defined as any processing activity on the farm or by local enterprise in which the farmer has an active interest. It includes cleaning, sorting, grading and treating a wide range of produce, grinding and milling feeds and fertilizers, mixing, packing, canning, refrigeration, conditioning and conditioned transport of produce. Apart from the principles and machinery available for the different processes, including auxiliary equipment such as pumps and fans, some attention is also paid to materials handling, process analysis and plant design, economy of manual operation and cost analysis. Instruments for measuring process conditions (e.g, temperature, fluid flow), their response, and control systems, are described. An important part of the book is that dealing with some of the principles of mechanics, physics and engineering involved, such as fluid mechanics, heat transfer and the laws of air-vapour mixtures. Although much of the basic data can be obtained from other sources, extensive lists of refer- ences being given at the end of each chapter, it is very useful to have this relevant information collected in one book, especially in view of the clear and concise presentation of the material, particularly the equations, tables and numerous illustrations. Being essentially a text book, problems are given at the end of each chapter.-E.H. 171
Transcript of W. Johnson, B.J. Lamp, ,Principles, equipment and systems for corn harvesting (1966) Agric....
J. agric. Engng, Res. (1967) 12 (2) 171-172
BOOK REVIEWS
Johnson, w.,o Lamp, B. J. Principles, equipment and systems for com harvesting. Agric. ConsultingAssociates, Wooster, Ohio, 1966, pp. 360, iUus.
The authors have brought together much existing information, evaluated, summarized and ina general sense integrated it into system evaluations. Some production statistics and other cropdata are given and the physical, physicomechanical and other engineering properties of the cropindicated. The characteristics of the standing crop, the effect of mechanical action, such asshelling, on kernel crackage, shelling percentage, yield when harvesting at different m.c., bulkdensity, etc. are examined. The major part of the book is devoted to field machinery used forharvesting and processing the crop, dealing with machinery costs, capacity and power requirements, functional requirements, machine components and their performance. The effects ofweather on harvesting, harvesting efficiency and losses are also considered. Information is givenon maize driers, both mobile and stationary, the relationships governing the drying process,drying costs and storage of maize. System analyses are made, with cost as the primary criterion,but taking into consideration the ultimate use for the product, labour and capital available,existing machines and structures, maximum quantity harvested, etc. A final chapter deals withthe measurement of factors related to maize condition and the instruments required.
The book has many good illustrations and extensive lists of references.-E.H.
Henderson, S. M,; Perry, R. L. Agricultural process engineering. Agricultural ExperimentStation, University of California, 1966, pp. 430
An interval of 11 a has passed since the publication of the first edition of this book duringwhich many developments in the basic mechanisms and useful applications relative to processengineering have taken place. These changes are reflected by additional material in the secondedition. Agricultural processing is defined as any processing activity on the farm or by localenterprise in which the farmer has an active interest. It includes cleaning, sorting, grading andtreating a wide range of produce, grinding and milling feeds and fertilizers, mixing, packing,canning, refrigeration, conditioning and conditioned transport of produce. Apart from theprinciples and machinery available for the different processes, including auxiliary equipmentsuch as pumps and fans, some attention is also paid to materials handling, process analysis andplant design, economy of manual operation and cost analysis. Instruments for measuring processconditions (e.g, temperature, fluid flow), their response, and control systems, are described. Animportant part of the book is that dealing with some of the principles of mechanics, physicsand engineering involved, such as fluid mechanics, heat transfer and the laws of air-vapourmixtures.
Although much of the basic data can be obtained from other sources, extensive lists of references being given at the end of each chapter, it is very useful to have this relevant informationcollected in one book, especially in view of the clear and concise presentation of the material,particularly the equations, tables and numerous illustrations.
Being essentially a text book, problems are given at the end of each chapter.-E.H.171
