Advances in agronomy volume 05

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ADVANCES IN AGRONOMY VOLUME V This Page Intentionally Left Blank ADVANCES IN AGRONOMY Prepared under the Auspices of the AMERICAN SOCIETY OF AGRONOMY VOLUME V Edited by A G NORMAN University of Mkhigan, Ann Arbor, Michigan ADVISORY BOARD J E ADAMS G W BURTON J E GIESEKING I J JOHNSON RANDALL JONES C E MARSHALL R Q PARKS K S QUISENBERRY 1953 ACADEMIC PRESS INC., PUBLISHERS NEW YORK Copyright 1953, by ACADEMIC PRESS INC 125 EAST2 STREET ~ ~ NEW YORX 10, N Y A11 Rights Reserved N o part ol this book may be reproduced in any form, by photostat, microfilm, or any other means, withozlt written permissiolt from the publishers Library of Congress Catalog Card Number : (50-5598) PRINTED IN THE UNITED STAlTB OD' AMERICA 'CONTRZBUTORS TO VOLUME V F E BROADBENT, Associate Professor of Soil Microbiology, Department of Agronomy, Cornell University, Ithaca, New Pork M B DAVIS,Chief, Horticulture Division, Central Experimental Farm, Department of Agriculture, Ottawa, Canada C H GOULDEN,Chief, Cereal Division, Experimental Fwm Service, Department of Agriculture, Ottawa, C a d I; W HURLBUT, Chairman, Department of Agricultural Engbaeerilzg, University of Nebraska, Lincoln, Nebraska M L JACKSON, Professor of Soils, University of Wiscomin, Madison, Wisconsin R W LEUKEL,Plant Pathologist, Division of Cereal Crops a w l Diseases, Burea
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Xem thêm: Advances in agronomy volume 05 , Advances in agronomy volume 05 , Chapter 1. A Half Century of Wheat Improvement in the United States, II. Acreage, Yield per Acre, and Production in the United States, III. Improvement in Cultural Practices, IV. The Role of Improved Varieties, V. Improvements in Methods of Breeding Wheat, VII. Control of Insect Pests of Wheat, Chapter 2. The Soil Organic Fraction, VII. Contribution to Plant Nutrition, III. General Characteristics of Modern Farming, Chapter 4. Chemical Weathering of Minerals in Soils, II. Relative Stability of Minerals; Weathering Sequences and Indexes, III. Factors Affecting the Reaction Rates of Chemical Weathering, IV. Frequency Distribution of Minerals in Soils in Relation to Chemical Weathering, V. Weathering Release of Nutrient Elements from Soil Minerals, Chapter 5. The Changing Pattern of Agronomy and Horticulture in Canada, III. Field Husbandry, Soils and Agricultural Engineering, II. Factors Influencing Soil Structure, III. Soil Management for Structure Maintenance, IV. Influence of Rotations on Conservation and Productivity

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