XTTKATKS LOST T\ DIJAIXACK r,i 



Plots 17 and 18 further illustrate the fate nf aimnouimii- 

 salts. These plots reecivc the dressiiiL,' of I'h.t 7 Km) II.. 

 ammonium-salts and eomplete minerals hut the animoiiiuiii 



N.aifl.trtu 



SpnngSoKin^ to Harvest Harvest to Sprin|So»«ing Sprin^Sowin^ to Harvest Harvest to Sprin^Sowmg 

 1879. 187^80. 1880. I88O/8I. 



I Drainage (in Inches) through 60 Soil. 



Loss of N.aa Nitrales perAcr 

 Manure Spring Sown 



E^' 



Fig. 7. — Loss of Nitrogen as Nitrates in the Drainage WatiT, lb. pi-r atrc 

 Comparison of Plot 7 nvinured with Aminoniuin-salt.s in tiu- spring', ami 

 Plot 15 in the autumn. 



salts and the minerals are applied in alternate years to the t\v») 

 plots. Thus in 1903 Plot 17 received annnonium-salts hut nn 

 minerals, and IMot 18 the minerals without the ammonium- 

 salts, and the treatment was reversed in llM)ii and aj^ain in 

 1904. It will be seen from Table XV., or Irom the dia<,Mam 

 Fig. 8, that the plot which in any year is receiving minerals 

 without nitrogen derives little or no benefit from tiie anunoma 



/<^Ar^ 



