176 



INDEX. 



PAGE 



Nitrogen, atmospheric, in the soil increased by use of soluble phosphates, . 163 



Experiment (Field A), . . . . . . . . . 30a 



Relative standing of different materials in, .... . 31a 



Numerical summary of substances examined in the chemical laboratory, . 53a 



Oats, relative need of phosphoric acid and potash for, .... 145 



Onions, bacterial root and stem rot of, ...... . 55a 



Parasites, cranberry fruit worm, ........ 109 



Insect, of the marguerite fly, ........ 50 



Peat, water movement in, ........ . 113 



Phosphates, comparison of, ........ . 34a 



Crops grown in, ......... . 150 



General treatment of fields in, ....... . 149 



Materials used and rates per acre in, . . . . ... 149 



On the basis of equal annual applications of phosphoric acid, . . 148 



On the basis of equal money's worth, ...... 147 



Plant-food elements applied in, . . . . . . . . 149 



Phosphates, cumulative effect of ........ . 157 



Different, increases of corn per acre with, ...... 157 



Relative profits on the, ........ 156 



Effect on soil acidity, ......... 159 



Experiments for comparison of different, . . .... 147 



Fine-ground rock, use of, advocated by Dr. Hopkins, .... 133 



Gain or loss per acre in crop values compared with cost of, . . . 156 



Increase in per cent, in crops produced by different classes of, . . 153 



Increase per acre in crops produced by different classes of, . . . 152 



Indirect or secondary effects of, ....... 158 



In Massachusetts agriculture, composition of soils, .... 137 



Conditions relating to the use of, ...... . 136 



Importance, selection and use, ....... 131 



Summary of results, ......... 131 



Relative needs of different crops for, ....... 166 



Soluble, beneficial secondary effects from the use of, . . . . 161 



Earlier and more perfect ripening promoted by, .... 162 



Effect of, on availability of soil constituents, ..... 163 



Effect of, on the cabbage crop, ....... 155 



Effect of, on early growth of roots and tops, .... 154, 161 



Effect of, on maturity, ........ 155 



Effect of, on tillering of cereal grains, ...... 162 



Use of, increases gain of atmospheric nitrogen in soil, . . . 163 



Sulfur supplied by, ......... 160 



Summary of conclusions relative to the need and selection of, . . 164 



Phosphoric acid and potash, relative need of, ..... . 139 



Plant breeding, work in, . . . . . . . . . .64 



Potash and phosphoric acid, relative need of, ..... . 139 



Potash, comparison of different materials furnishing, ..... 33a 



High-grade sulfate compared with muriate, ..... 33a 



Potatoes, powdery scab of, ........ . 55a 



Relative need of phosphoric acid and potash for, .... 140 



Rhizoctonia, disease of, . . . . . ' . . . . 56a 



Silvery scurf of, ......... . 56o 



Stored, a secondary rot of, ........ 57a 



Dry rot of, .......... . 56a 



Variety test of, .......... 41a 



Poultry husbandry department, report of the, ...... 69a 



Investigation in the, ......... 69a 



Powdery scab of potatoes, ......... 55a 



