CONTENTS . 



lesults Secured from Mulching; 



Comparison of moisture and HO3 con- 

 tent of the soil 



Results secured from Scraping 



Comparison of the moisture and HO3 

 content of the soil 



Comparison of Mulched and Scraped Plats ♦ 



Variations in Fertilizer Constituents 



Yield of Nitrogen in Crops 



Amount of NO 3 Remaining in Soil 



Capillarity of Different Plats 



APPENDIX. 



Moisture and Fertilizer Content of the Soil, 



in Detail (Table A) 130 - 145 



Further Soil Studies 146 - 169 



Poor Space and Specific Gravity 146 



Poor Space, Suggestions for Determining 152 



Rate of Evaporation and Loss from Drainage: 153 - 169 

 from platinum dishes p. 155; from cyl- 

 inders of soil p. 155; the "fairly uni- 

 form level" in cylinders of soil p. 163; 

 rapid fall at end of the "fairly uniform 

 level, p. 165. 



