FIELD CROPS. 1035 



Among the different niixtnrcs of peas and oats <iro\vn for green fodder, 2 }>u. of 

 Siljerian oats antl 1 bu. of Prussian Blue peas gave very satisfactory results. The 

 average results for 5 years for the different mixtures undei- test were as follows: 

 Enrl;/ varieties — Daubeney oats and Chancellor peas, 5.9 tons ; nicdluiu early varieties — 

 Siberian oats and Prussian Blue peas, 6.9 tons; and late varieties — Mannnoth Cluster 

 oats and Print^e Albert peas, 6.1 tons of green crop per acre. On an average the 

 early varieties were cut 70 days, the medium early varieties 77 days, and the late 

 varieties 84 days after seeding took j)lace. 



Pearly White Vienna kohl-rabi gave the largest yield jx-r acre in iHdl, and also in 

 the average of 5 years. 



The resnlts for 7 years show that Dwarf Essex rape produced an average of 22.4 

 tons and Victoria 20.6 tons of green forage per acre. From the results of experi- 

 ments carried on for 5 years, it was found that large rape seed yielded 70.4, medinm- 

 sized seed 15, and small seed 12.4 tons of green fodder per acre. The average results 

 of sowing rape on level and ridge land are somewhat in favor of ridging. Snbsoiling 

 immediately before sowing produced no advantage. The results froTu j)lanting rape 

 seed at different depths have varied in different years, but in general were in favor 

 of shallow planting. 



The results with a number of leguminous crops and grasses grown for green fodders, 

 hay, and pasture are reported. 



Field crops, G. E. Day {Ontario Agr. (hi. and Expt. Farm lipt. 1901, pp 68, 64). — 

 The culture of different field crops at the college in 1901 is briefly noted. 



Plant food trials, H. E. Stockbridge (Florida Sta. Rpt. 1901, pp. 2i^-36, fig. 1) . — 

 Fertilizer tests with sweet potatoes, sugar cane, Irish potatoes, corn, cotton, and 

 cassava are reported. Each crop received a series of fertilizer applications, includ- 

 ing a standard application and multiples and fractional parts of the same. The check 

 plats received no fertilizers. 



Street potatoes. — The experiment with sweet potatoes demonstrated that the normal 

 application consisting of 200 lbs. acid phosphate, 204 lbs. cotton-seed meal, 66 lbs. 

 nitrate of soda, and 80 lbs. sulphate of potash per acre was the most profitable 

 formula. 



Sugar cane. — The standard formula ft)r sugar cane consisted of 50 lbs. each of acid 

 phosphate and muriate of potash and 400 lbs. of cotton-seed meal per acre. Increas- 

 ing this application had no material effect on the crop. Diminishing the proportion 

 of phosphoric acid and of nitrogen reduced the nitrogen content of the cane and 

 diminishing the proportion of i)otash reduced the yield. 



Potatoes. — In connection with the tests on Irish potatoes, a study was made of cot- 

 ton-seed meal, castor pomace, and nitrate of soda as sources of nitrogen. Cotton- 

 seed meal and castor pomace gave practically the same result, but the nitrate increased 

 the yield over these 2 forms by 30 per cent. The standard application for potatoes 

 consisted of 500 lbs. acid phosphate, 250 ll)s. cotton-seed meal, 125 lbs. nitrate of soda, 

 and 200 lbs. sulphate of potash per acre. This application proved very effective on 

 soil exhausted by tobacco culture and this result is considered a demonstration of 

 the value of crop rotation. Cowpeas preceding the potatoes increased the yielil 40 

 per cent. Where only one-half of the normal application of phosphoric acid was 

 applied a larger yield of potatoes was obtained than where the full normal api)lica- 

 tion was used. A reduction of the normal application of j)otash to one-half dimin- 

 ished the yield 40 per cent, representing a financial loss of $5.50 per acre. 



Corn.— In the tests with corn an application of 200 ll)s. acid phosi)hate, 125 lbs. 

 cotton-seed meal, 75 \hs. nitrate of soda, and 100 lbs. muriate of i)otash was used an 

 the standard. This application increased by one-half gave an increase in yield of 

 18 bu. per acre, but the result was the same when the application was diminished 

 by one-half. This increase was the largest in the series of tests and the u.se of one- 

 half the normal application was the most ])rofitable. 



