CONTENTS. Xlll 



CHAPTER X. 



EXPERIMENTS WITH THE CARBONATES, PHOSPHATES, AND SILICATES OF 

 POTASH AND SODA. 



Page 



1. Composition of the carbonates of potash and soda, their properties 



and their functions in the soil and in the plant, . . .157 



2. Eesults of published experiments with the carbonates of potash and 



soda, .159 



3. Suggestions for experiments with the carbonates of potash and soda, 161 



4. Composition of the phosphates of potash and soda, . . 162 



5. Experiments with the phosphates of potash and soda, applied alone, 



and along with superphosphate of lime, . . . .163 



6. Suggestions for comparative experiments with the phosphates of 



potash and soda, ....... 164 



7. Composition of the silicates of potash and soda, their properties, and 



f their functions in the soil and in the plant, . 165 



Eesults of experiments with the silicates of potash and soda, . 167 

 9. Suggestions for comparative experiments with the silicates of potash 

 and soda, ........ 



CHAPTER XI. 



EXPERIMENTS WITH THE NITRATES OF POTASH, SODA, LIME, AND 



MAGNESIA. 







1. Composition of the nitrates of potash, soda, lime, and magnesia, their 



properties, and their functions in the soil and in the plant, . 170 



2. Sensible effects produced by the application of the nitrates of potash 



and soda, ........ 173 



3. Results of past experiments with the nitrates of potash, soda, and 



lime, . 174 



4. Results of experiments with nitrate of soda, applied in different pro- 



portions to the same crop, ..... 181 



5. Suggestions for new experiments with the nitrates of potash, soda, 



lime, and magnesia, . . . . . .182 



CHAPTER XII. 



EXPERIMENTS WITH THE SALTS OF AMMONIA. 



1. Composition of caustic ammonia, and of the carbonate, sulphate, 



muriate, phosphate, nitrate, acetate, oxalate, and humate of am- 

 monia, ........ 185 



2. Functions performed by the salts of ammonia in the soil and in the 



plant, ........ 188 



3. Experiments with carbonate of ammonia, and with ammoniacal 



liquor, ........ 190 



