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CROPS AND METHODS FOR SOIL IMPROVEMENT
THE MACMILLAN COMPANY
NEW YORK . BOSTON . CHICAGO
DALLAS . SAN FRANCISCO
MACMILLAN & CO., Limited
LONDON . BOMBAY . CALCUTTA
MELBOURNE
THE MACMILLAN CO. OF CANADA, Ltd.
TORONTO
[Illustration: Alfalfa and Corn in Indiana.]
CROPS AND METHODS
FOR SOIL IMPROVEMENT
By
ALVA AGEE, M.S.
HEAD OF DEPARTMENT OF AGRICULTURAL EXTENSION
ACTING DEAN AND DIRECTOR OF THE SCHOOL OF
AGRICULTURE AND EXPERIMENT STATION OF
THE PENNSYLVANIA STATE COLLEGE
_ILLUSTRATED_
New York
THE MACMILLAN COMPANY
1912
_All rights reserved_
Copyright, 1912,
By THE MACMILLAN COMPANY.
Set up and electrotyped. Published November, 1912.
Norwood Press
J. S. Cushing Co.--Berwick & Smith Co.
Norwood, Mass., U.S.A.
CONTENTS
CHAPTER I
PAGES
INTRODUCTION 1-11
In lieu of preface 1
Natural strength of land 2
Plant constituents 2
Organic matter 4
Drainage 6
Lime 7
Crop-rotation 8
Fertilizers 9
Tillage 10
Control of soil moisture 11