1919] 



FIELD CROPS. 



733 



Among the forage crops tested the highest yields wore secured from Kursk 

 millet, Amber cane, Sudan grass, Manchu soy beans, and a so-called black 

 yellow soy bean, amounting to 4,840, 4,500, 3,400, 2,800, and 2,480 lbs. per acre, 

 respectively. The corn varieties did not mature seed but a large Dumber of 

 them are said to have produced good silage. 



In nursery increase tests, Victory oats produced at the rate of 57.3 bu. per 

 acre, No. 923 barley 38.2 bu., Disco No. 32 C alfalfa 2,025 lbs. In one cutting, 

 and Disco No. 78, 1,925 lbs. 



Single cuttings of different grasses resulted In the following yields: Tall 

 meadow oats grass 3,940 lbs. per acre, slender wheat grass 3,700 lbs., orchard 

 grass 3,380 lbs., timothy 3,300 lbs., and Kentucky blue grass 8,160 lbs, The 

 highest yielding combination of grasses in 1917 comprised (1) brome grass 10 

 lbs., tall meadow oat grass <> lbs., white clover 2 lbs., and alfalfa 4 lbs., with a 

 yield of 6,100 lbs. per acre; (2) timothy 6 lbs. orchard grass 6 lbs., and alfalfa 

 4 lbs., wiili 5,200 lbs.; and (3) brome grass 10 lbs., alfalfa 8 lbs., and meadow 

 fescue 6 lbs., with 4,160 lbs. 



Winter wheat seeded on stubble and on plowed land winterkilled, while that 

 seeded on corn land with every sixth row of corn left standing produced l:J..~i 

 bu. per acre, and with all the corn left standing, 30.7 bu. Straw failed to supply 

 the necessary protection. Seedings made August 15 and September 1 resulted in 

 higher yields than later seedings. Winter wheat production on the substation 

 is deemed unprofitable. 



Contradictory results were secured in a comparison of tractor with horse 

 plowing and disking. Disking the stubble after harvesting proved beneficial. 

 Early August plowing for corn resulted in a yield of 2,925 lbs. of fodder per acre 

 as compared with 1,100 lbs. following spring plowing. 



Under various cropping systems the wheat yields were as follows: Continu- 

 ous cropping 15.9 bu. per acre; continuous cropping with clover 16.0 bu. ; and 

 3-, 4-, 5-, and 7-year rotations 25.8, 23.7, 25.5, and 20.9 bu., respectively. Oats 

 produced 73.8, 65.2, and 71.9 bu. per acre in 4-, 5-, and 7-year rotations, re- 

 spectively. Barley produced 39.5 bu. in a 3-year rotation and 39.6 bu. in a 

 7-year rotation. 



The results obtained to date in the fertilizer tests in the 3- and 4-year rota- 

 tions may be summarized as follows : 



Results with fertilizers in the S-ycar rotation. 



