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قراءة كتاب Crops and Methods for Soil Improvement
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اللغة: English
الصفحة رقم: 1
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 |
CHAPTER II
| The Need of Lime | 12-22 |
| The unproductive farm | 12 |
| Soil acidity | 13 |
| The rational use of lime | 14 |
| Where clover is not wanted | 16 |
| Determining lime requirement | 17 |
| The litmus-paper test | 19 |
| A practical test | 20 |
| Duration of effect | 21 |
CHAPTER III
| Applying Lime | 23-35 |
| Forms of lime | 23 |
| Definitions | 24 |
| The kind to apply | 26 |
| The fineness of limestone | 27 |
| Hydrated lime | 27 |
| Stone-lime | 28 |
| Ashes | 30 |
| Marl | 31 |
| Magnesian lime | 31 |
| Amount per acre | 32 |
| Time of application | 34 |
CHAPTER IV
| Organic Matter | 36-45 |
| Office of organic matter | 36 |
| The legumes | 38 |
| Storing nitrogen | 39 |
| The right bacteria | 41 |
| Soil inoculation | 42 |
| Method of inoculation | 43 |
CHAPTER V
| The Clovers | 46-58 |
| Red clover | 46 |
| Clover and acid soils | 47 |
| Methods of seeding | 48 |
| Fertility value | 49 |
| Taking the crops off the land | 51 |
| Physical benefit of the roots | 52 |
| Used as a green manure | 52 |
| When to turn down | 53 |
| Mammoth clover | 54 |
| Alsike clover | 55 |
| Crimson clover | 56 |
CHAPTER VI
| Alfalfa | 59-70 |
| Adaptation to eastern needs | 59 |
| Fertility and feeding value | 60 |
| Climate and soil | 61 |
| Free use of lime | 62 |
| Inoculation | 62 |
| Fertilization | 63 |
| A clean seed-bed | 64 |
| Varieties | 65 |
| Clean seed | 65 |
| The seeding | 66 |
| Seeding in August | 67 |
| Subsequent treatment | 68 |
CHAPTER VII
| Grass Sods | 71-79 |
| Value of sods | 71 |
| Prejudice against timothy | 72 |
| Object |