101 



gives the crops under investigation. The fertiHzer experi- ^°^^ 'o*" 

 ments are conducted on this farm similarly to those of the *"^* 

 Fruit Farm, though less in detail. 



As the soil was broken for the first time in 189^, the 

 various plantings suffered from the ills natural to a new 

 soil. We review here the results for the years 1H98, 1899, 

 and 1900, and in a few cases 1901, treating only of those 

 plots relating to experiments with Nitrate of Soda. 



Results on the Fruit Farm. 



For the purpose of convenient general comparison of 

 the growth on the various plots, the diameters of the vines 

 and trees were measured at a uniform distance from the 

 ground, the object being to show the growth effect of any 

 particular fertilizer combination by comparing the average 

 diameter of the plants on the unfertilized plot with that of 

 the plants on the plot fertilized. The potash and phos- 

 phoric acid were applied in the spring, the Nitrate of Soda 

 half early in the growing season and the remainder from 

 three to five weeks later. 



On the grape series two varieties were planted, Delaware 

 and Niagara. The following table shows the fertilizer 

 applied per acre, and the growth of vines as indicated 

 by the average diameter of the vines in each plot. For 

 convenient comparison these measurements are computed 

 to percentage of increased growth as compared with the 

 growth made on the unfertilized plot. 



Grapes — "Delaware." 



The letters "G.M." indicate that plot 23 was given the 

 green manure treatment; that is, an extra application of 

 mineral fertilizers was made and cow peas planted between 

 the rows, the object being to determine if legume nitrogen 

 can be utilized to replace Nitrate of Soda. The average 

 gain made by the Nitrate of Soda was ././ per cent, while 

 the green manure reached but 29 per cent. The general 



