132 EXPERIMENT STATION RECORD. [Tol. 38 



of only 0.58 and 0.75 ton per acre respectively, winterkilled, while sweet clover, 

 sainfoin, and Bokhara clover are reported as producing poor stands and being 

 very weedy. 



Tests with different-sized seed pieces of potatoes resulted in yields per acre 

 of 336.1 bu. for whole tubers, 272.7 bu. for half-tubers, 232.7 bu. for quarter- 

 tubers, and 258.9 bu. for the ordinary cut, with percentages of marketable tubers 

 amounting to SG.9, 88, 88.4, and 86.7, respectively. Fifty-three varieties of 

 potatoes were tested, with yields varying from 8 bu. per acre for Early Market, 

 to 426 bu. for Peach Blow. British Queen and Green Mountain, with yields of 

 412.4 and 411.5 bu., were second and third, respectively. Green Mountain was 

 highest in the percentage of marketable tubers, with 95.4 per cent. 



In the alfalfa experiments the average of all varieties inoculated with soil 

 and grown without a nurse crop was 4,600 lbs. of cured hay per acre as com- 

 pared with 3,133.3 lbs. with barley as a nurse crop. In another test the average 

 yields were 5.120 and 3,520 lbs., respectively. The total average yield of all 

 varieties tested was 5,776.4 lbs. of cured hay per acre. N. W. Experiment Sta- 

 tion, which is thought to be a strain of Minnesota Grimm, gave the highest total 

 yield of hay, 7,188.1 lbs. per acre, followed by Grimiu with 7,104 lbs. 



[Field crops], R. H. Clemens (Rpt. Montieth Demon. Farm, 1916, pp. S-21, 

 figs. 10). — Field work on the Montieth Demonstration Farm in Ontario with 

 winter and spring wheat, barley, peas, flax, oats, clover and gx'ass seed, alfalfa, 

 turnips, and potatoes for 1916 is reported. Satisfactory results were obtained 

 with feeding silage made from a mixture of oats, peas, and vetches. 



[Field experiments in 1916], H. von Feilitzen (Svenska Mosskulturfor. 

 Tidskr., SI (1917), No. 3, pp. 246-260). — The experiments reported were con- 

 ducted by the Swedish Moor Culture Association on 20 experiment fields and 

 26 demonstration fields on moor soils. The results are summarized as a whole. 



The use of lime, even on peaty soils in which the lime content was nearly 

 adequate, produced good effects mainly, it is thought, through a promotion of 

 nitrate formation. The application of increasing quantities of phosphoric acid 

 and potash on soiling crops and grass gave varying results in different locali- 

 ties. At Kristineberg the best yield of green forage was secured from the use 

 per hectare of 300 kg. of superphosphate and 250 kg. of 37 per cent potash salt. 

 On meadows the best results were secured at Tobo with 300 kg. of Thomas slag, 

 at LundSs with 200 kg. of superphosphate and 100 kg. of 37 per cent potash 

 salt, and at Torne with 200 kg. each of superphosphate and 37 per cent potash 

 salt. 



Applications of nitrate of soda on a fairly good peat soil increased the yield of 

 spring rye grown for soiling purposes, but on the best soils of this type the use 

 or nitrate did not prove profitable. Barnyard manure in general gave good 

 results. In one locality its residual effect the third year after application was 

 not very apparent. The value of the manure in these tests, based on the re- 

 sults, was 88 ore per 100 kg. (about 10 cts. per 100 lbs.). Annual fertilization 

 of the soil was found necessary to obtain good yields of the different moorland 

 crops, and the addition of commercial fertilizers to barnyard manure in general 

 gave profitable returns. 



Results obtained with oats, barley, root crops, and grass are also briefly 

 noted. 



[Report of field crop work], W. J. Colebatch and R. C. Scott (Jour. Dept. 

 Agr. So. Aust., 20 {1916), Nos. S, pp. 175-195; 4, pp. 256-276; 5, pp. SU-S59; 

 20 {1917), No. 6. pp. // 64-^79). —Tillage, raanurial, and rotational experiments 

 conducted on the permanent experimental fields of the Roseworthy Agricultural 

 College since 1904 are outlined and the results through 1915 reported. Detailed 

 tabular data are presented and discussed. 



