?00 



STATE BOARD OF AGRICULTURE. 



These soils were received in the fresli state and were used in that con- 

 dition. Certain quantities of them were placed on filler papers in funnels 

 and washed until all their free soluble salts were eliminated and their 

 freezing point depression was "very close to that of distilled water. A 

 portion of each washed soil was then placed in the freezing point tube, 

 water being added to it to bring up the water content to the ratio of 

 about 1 or soil to .7 of water, and the freezing point depression was deter- 

 mined immediately and as often thereafter as was deemed necessary. The 

 data secured are presented in tables 9 to 14, inclusive. Below each table 

 is a description of the fertilizer treatment of the respective soils. 



TABLE 9. — RATE AND EXTENT OP SOLUBILITY OF RHODE ISLAND SOILS. RATIO OF 

 SOIL TO WATER WAS ABOUT 1 TO .60 AND MIXTURE MAINTAINED AT ROOM TEM- 

 PERATURE. FIGURES REPRESENT FREEZING POINT DEPRESSION. 



Days. 



Soil No. 1 

 Soil No. 2. 

 Soil No. 3 

 Soil No. 4 

 Soil No. 5 

 Soil No. 6 

 Soil No. 7 







c° 



.010 

 .010 

 .010 

 .010 

 .010 

 .010 

 .010 



1 



c° 



.010 

 .010 

 .010 

 .011 

 .010 

 .010 

 .012 



c° 



.010 

 .010 

 .010 

 .011 

 .010 

 .010 

 .012 



.012 

 .012 

 .012 

 .014 

 .012 

 .012 

 .011 



C° 



.014 



.021 



.014 



.020 



.012 



.010 



.017 



10 



C° 



.020 



.022 



.022 



.022 



.012 



.011 



.019 



17 



0=^ 

 .020 

 .023 

 .022 

 .021 

 .013 



Oil 

 .020 



24 



C° 

 .020 

 .023 

 .022 

 .022 

 .012 

 .011 

 .020 



31 



C° 



.023 



.025 



.023 



.025 



.012 



.011 



.022 



45 



C° 

 .025 

 .028 

 .025 

 .029 

 .013 

 .011 

 .024 



61 



C° 



.025 



.029 



.028 



.031 



,015 



.012 



.025 



Soil No. 1. 



Soil No. 2. 



Soil No. 3. 



Soil No. 4. 



Soil No. 5. 

 Soil No. 6. 

 Soil No. 7. 



158 ponnds nitrate of soda, 96 pounds sulfate of ammonia, 450 pounds tankage, 



• 571 ponnds acid phosphate, 97 poiinds sulfate of potash, lime. 

 127 pounds niti-ate of soda, 574 pounds acid phosphate, 200 pounds salt, 856 



pounds wood ashes, lime. 

 127 pounds nitrate of soda, 96 pounds sulfate of ammonia, 753 pounds tankage, 



659 pounds acid phosphate, 200 pounds salt, 1484 pounds wood ashes, lime. 

 191 pounds nitrate of soda, 144 pounds sulfate of ammonia, 301 pounds tankage, 



444 pounds double supernhosphate, 131 pounds magnesium sulfate, 103 



pounds sulfate of potash, lime. 

 Same as No. 4 without lime. 

 No fertilizers, almost a virgin soil. 

 Virgin soil. 



