13b' 



llATC^Il EXPERIMENT t^TATlOxX. 



[.Ian. 



oaoh. The materials used as souires of nitrogen and potash 

 funiisli nitrogen at tlie rate of 52 pounds and i)otasli at the 

 rate of 152 j)ounds per aere. With some erops a sup})le- 

 mentary applieation of a (juiek-aeting nitrogen fertilizer has 

 been made to all plots alike. The crops which have been 

 grown in this field during the progress of the experiment are 

 as follows: corn, cabbages, corn, in UX)0 two crops, — oats 

 and Hungarian grass (both for hay), onions, and onions. 

 With the exce})tion of the onions, all the cro})s previously 

 ffrown in this tield have ijiven good yields, even on the three 

 plots in the tield which have received no phosphate. 



Tlu» soil of the field at the beixinning of the experiment 

 was not (juite even in (iiuility throughout. Plot 1 surpassed 

 any other in the field in fertility at the start, and on the 

 whole (although tlu' differiMice is not very nuirked) there 

 appears to be a gradual natural decline in productiveness 

 from this end of the Held toward the other. 



'f he crop of the })resent season was cabbages. The variety 

 is the Danish Ball-head. The seed was sown at the usual 

 time for the cro}) in this locality, but so abnormally cold 

 was the season that th(^ crop was far from mature when cold 

 weather set in. Still, the yields (which include weight of 

 stumps, loose leaves and soft heads, as well as the weight 

 of hard heads and totals) make it possible to estimate the 

 relative availability of the different jihosphates to the crop 

 grown. The rates of yield per acre are shown in the follow- 

 ing: table : — 



Cal>()(t(/('s on l^lotfi irilh Ef/iKil Amoufds of Pho!<phoric Acid. 



