CONTENTS. Vll 



PAGE 



Influence of manure upon the water-soluble salts recovered from 



plants... * 49 



Influence of manure upon the amounts of potash recovered from 



soils by plants 53 



Influence of manure upon the amounts of lime and magnesia 



recovered from soils by plants 56 



Influence of manure upon the amounts of nitric and phosphoric 



acids recovered from soils by plants 58 



Largest returns from stable manure 60 



BULLETIN "F." 



MOVEMENTS OF WATER-SOLUBLE SALTS IN SOILS. 



Capillary movement of soluble salts in soils 62 



Capillary movement in 6 soil types 62 



Capillary concentration of salts under field conditions 69 



In a coarse sandy soil 69 



In a medium clay loam 70 



In Norfolk Sandy Soil 71 



On Goldsboro Compact Sandy Loam and Selma Silt Loam.. 73 



Capillary movement of sallts in 8 soil types 74 



Method of treatment 74 



Amount of capillary movement. 76 



Duration of capillary movement 76 



Water-soluble salts recovered after capillary movement 77 



Movement of potash by capillarity 82 



Movement of lime by capillarity 85 



Movement of magnesia by capillarity 86 



Movement of phosphates by capillarity 88 



Movement of sulphates by capillarity 90 



Movement of chlorides by capillarity 93 



Recovery of absorbed nitric acid 94 



Retention, of nitrates by clean sand . . . w 97 



Influence of earth mulches upon the movement and distribution 



of water-soluble salts in soils 98 



Conditions of the experiment 98 



Distribution of salts in mulched and unmulched soils after 



capillary movement of 70 days 100 



Influence of capillary movement in soils under naked fallow 



treatment upon the amounts of water-soluble salts in soils. 105 



Influence of 3-inch earth mulches on the distribution of nitrates, 



sulphates and chlorides in soils 107 



Influence of 3-inch earth mulches on the distribution of phos- 

 phates, silica and bicarbonates 108 



Bearing of capillary movement of salts upon soil management. . . 110 

 Cultivation to make water-soluble plant food materials more 



available 110 



Loss of plant food in surface drainage 113 



