270 Agricultural Experiment Station, Ithaca, N. T. 



The first of these ta'bles show that the nitrate of soda gave the 

 heaviest yield before frost, and it was the only treatment which 

 gave as good results as the check plot, which had no fertilizer. 

 It is to be observed, also, that while bone black and muriate of 

 potiish gave the poorest results as single fertilizers, they gave the 

 best results of any of the combinations. If we turn to Table V, 

 however, and study the total yield of the season, we notice that 

 the nitrate of soda plot has perceptibly gained in proportional 

 yield, and that the best combination is No. 7, which contains 

 nitrate of soda; but the combination plot gives a trifle x>oorer 

 results than the nitrate alone. These two instances are also the 

 only ones which equal or exceed the yield of the no-treatment 

 plot. These tests are a repetition of a series made in 1891, wTien 

 one-fortieth acre plots were used. Last year, however, the trial 

 was made upon very poor and intractable soil and nitrate of soda 

 gave the smallest yields of the single treatments, and the best 

 yield was obtained from a combtQation of all three materials, but 

 even then the crop averaged to frost only 3.3 pounds per plant, 

 against 9.5 pounds in the best yield this year, in a shorter 

 season. The experiments of 1891, seem to show, therefore, that on 

 very poor land nitrate of soda alone gives very little result, all the 

 three elements being needed to produce even a small yield; the 

 experiments of 1892 seem to show that upon tolerably good soil 

 nitrate of soda alone may give profitable results, and this conclu- 

 sion is strengthened by the other evidence which has been pre- 

 sented in this paper. 



3. Relation of variety to fertilizing. — Last year we raised the 

 question as to whether there is any difference between varieties in 

 the readiness with which they respond to fertilizers. Are some 

 types of varieties more likely to give good results from manuring 

 than others? The small test made upon this point last season 

 showed a decidedly greater tendency on the part of improved or 

 highly developed varieties, like the Ignotum, to produce more 

 fruits to the plant, but the total weight of crop did not appear to 

 foUow this course. This year, five varieties were submitted, to 



