FIELD CROPS. 3o!> 



acre, (2) phosphate .570 lbs. The phosphate, which in the preceding 

 experiments with rye gave an increase of 7.6 per cent, in these experi- 

 ments yielded 5.1 per cent increase ; the manure gave in these experi- 

 ments 19.4 per cent increase, in the preceding experiments 13.5 per 

 cent increase. 



Potatoes. — In the first series of experiments with potatoes the object 

 was to investigate the inlinence of bone meal, applied both broadcast 

 and in hills, and of nitrate of soda and potash. The following amounts 

 were used : (1) Bone meal A 35C> lbs. per acre broadcast, (2) bone meal B 

 178 lbs. broadcast, (3) potash 207 lbs.. (4) nitrate of soda 207 lbs., (5) bone 

 meal A 356 lbs. in hills, and (6) bone meal B 178 lbs in hills. The 

 potato leaves were affected by rot (Phytophthora infestans). All ferti- 

 lizers gave an increase — potash 3.5 ; bone meal B broadcast 18.2, in hills 

 39.8; bone meal A broadcast 20.3, in hills 41.3; and nitrate of soda 55.4 

 per cent. The greater the yield the less the starch content of the pota- 

 toes. Potash alone caused a very slight increase in the yield, but 

 decreased the starch content 0.15 per cent. 



In the second series of experiments the influence of double plowing and 

 of planting at a depth of 10.5 to 12.2 in. was investigated. Experiments 

 were also made in which the seed potatoes were soaked for 24 hours in 

 a 2 h, per cent solution of copper sulphate, with a view to ascertaining 

 whether this treatment prevents rot and exerts any influeuce on the 

 yield. The double plowing produced an increase of 6.2 per cent; the 

 treatment with copper sulphate caused a decrease of 9.9 per cent. 

 The starch content was not changed by the double plowing, but the 

 treatment with copper sulphate resulted in a decrease of 1.3 per cent 

 in starch content. 



The object of the third series of experiments was to ascertain the 

 influence of spraying the potato leaves with various liquids on the yield 

 and starch content. The following solutions were applied : (1) Lime- 

 water, (2) pure water, (3) copper sulphate and limewater, (4) copper 

 sulphate. While spraying with pure water gave an increase of 2.6 per 

 cent and with limewater of 10.8 per cent, spraying with copper sulphate 

 alone caused a decrease of 4.1 per cent aud with copper sulphate and 

 limewater a decrease of 0.45 per cent. The starch content decreased 

 with limewater (0.0 per cent), but increased with pure water (0.5 per 

 cent), with copper sulphate alone (0.6 per cent), and with copper sul- 

 phate and limewater (1 per cent). 



Clover with timothy for hay. — The object of the first series of experi- 

 ments with these crops was to observe the influence of kainit, nitrate 

 of soda, gypsum, and phosphate-gypsum on the yield of clover with 

 timothy at the first mowing of the first year. Fertilizers were applied 

 as follows : 370 lbs. per acre of kainit and 250 lbs. per acre of the other 

 fertilizing materials. Kainit gave 1.7 per cent, phosphate-gypsum 10.4 

 per cent, and gypsum 5.9 per cent decrease, and only nitrate of soda 

 gave an increase in yield (6.5 per cent). 



