CHAPTER XVI
| The Need of Commercial Fertilizers | [ 159-170] |
| Loss of plant-food | 159 |
| Prejudice against commercial fertilizers | 160 |
| Are fertilizers stimulants? | 161 |
| Soil analysis | 162 |
| Physical analysis | 163 |
| The use of nitrogen | 164 |
| Phosphoric-acid requirements | 165 |
| The need of potash | 166 |
| Fertilizer tests | 167 |
| Variation in soil | 168 |
CHAPTER XVII
| Commercial Sources of Plant-food | [ 171-187] |
| Acquaintance with terms | 171 |
| Nitrate of soda | 171 |
| Sulphate of ammonia | 178 |
| Dried blood | 173 |
| Tankage | 174 |
| Fish | 175 |
| Animal bone | 175 |
| Raw bone | 177 |
| Steamed bone | 178 |
| Rock-phosphate | 178 |
| Acid phosphate | 180 |
| Basic slag | 183 |
| Muriate of potash | 184 |
| Sulphate of potash | 185 |
| Kainit | 185 |
| Wood-ashes | 185 |
| Other fertilizers | 186 |
| Salt | 186 |
| Coal-ashes | 187 |
| Muck | 187 |
| Sawdust | 187 |
CHAPTER XVIII
| Purchasing Plant-food | [ 188-197] |
| Necessity of purchase | 188 |
| Fertilizer control | 189 |
| Brand names | 191 |
| Statement of analysis | 191 |
| Valuation of fertilizers | 193 |
| A bit of arithmetic | 194 |
| High-grade fertilizers | 196 |
CHAPTER XIX
| Home-mixing of Fertilizers | [ 198-208] |
| The practice of home-mixing | 198 |
| Effectiveness of home-mixing | 198 |
| Criticisms of home-mixing | 199 |
| The filler | 202 |
| Ingredients in the mixture | 203 |
| Materials that should not be combined | 207 |
| Making a good mixture | 207 |
| Buying unmixed materials | 208 |
CHAPTER XX
| Mixtures for Crops | [ 209-219] |
| Composition of plant not a guide | 209 |
| The multiplication of formulas | 209 |
| A few combinations are safest | 210 |
| Amount of application | 211 |
| Similarity of requirements | 213 |
| Maintaining fertility | 215 |
| Fertilizer for grass | 216 |
| All the nitrogen from clover | 218 |
| Method of applying fertilizers | 218 |
| An excess of nitrogen | 219 |