932 EXPERIMENT STATION RECORD. 



closely by a plat which was subsurface packed, (d) The sowing of wheat in drills 

 on ground prepared either by the Campbell or by the ordinary method, and culti- 

 vated, lias not proved a success under prevailing conditions. It has failed to give 

 profitable yields, (e) As between deep and shallow plowing, there stands a slight 

 difference in average results in favor of shallow plowing. (/) The yield of plats 7 

 and 20 would seem to indicate virtue in fall harrowing. 



"(2) The plats plowed and subsoiled with the disk plow leads all other plats with 

 a yield of 26.53 bu. per acre. This was followed closely by the plat which was 

 plowed with a disk plow but not subsoiled. 



"(3) On spring-plowed plats, (a) the plats that gave the largest average yield 

 (20.36 bu. ) were those which were subsurface packed and sown in the ordinary way. 

 (h) The next best yield came from the plat which was plowed with the disk plow 

 and subsurface packed and sown in the ordinary way. (c) The sowing of wheat in 

 drills, on ground prepared either by the Campbell or other methods, and cultivated, 

 has not given good results, (d) Here, as on the fall-plowed ground, a slight 

 increase of yield was realized on shallow plowing over that on deep plowing. 



"(1) Comparing results on fall plowing with those on spring plowing, it will be 

 seen lor this year that (a) the subsurface packing of ground immediately after plow- 

 ing seems to have a very beneficial effect upon yields in both cases; (b) fall subsoil- 

 ing with a subsoiler to a depth of 8 in. below the bottom of a 6-in. furrow has a 

 beneficial effect upon Ihe next fallowing crop, while spring subsoiling with a sub- 

 soiler gave lower yields in the next crop than when the ground was prepared in the 

 ordinary way; (c) fall subsoiling with the disk plow, when followed by the harrow, 

 gave an increased yield, while spring subsoiling with a disk plow lessened the yield; 

 (d) the average yield from shallow plowing, both spring and fall, is slightly larger 

 than that from deep plowing; {<■) Bowing in drills and cultivating has given reduced 

 yields in every case." 



Experiments similar to the above were made in cooperation with the 

 Great Northern Railroad Company at 3 other places in North Dakota, 

 viz, at Lisbon, and G miles south of Glen TJllin and 8 miles north of 

 Jamestown, and observations were made at a number of other farms 

 where the Campbell method Mas being tested under the auspices of 

 the Railroad Company. 



The conditions were so different in different cases that definite con- 

 clusions are not attempted, but the statement is made that — 



"East of the Missouri River, where the weather conditions have been similar to 

 those experienced on the station farm, the results as to yields, so far as reported, 

 have been similar to those obtained at the station. The yield of Campbell-grown 

 grains have been less than those of ordinary grown grain. 



" In nearly every case where moisture determinations have been made more moisture 

 was found in the Campbell-worked ground than in that worked by the ordinary 

 method." 



Geological history of the Chautauqua grape belt, R. S. Tarr {New York Corndl 

 Sta. Rpt. 1S96, pp. 127-158, figs. 25).— A reprint of Bulletin 109 of the station (E. S. R., 

 8, p. 111). 



The moisture of the soil and its conservation, L. A. Clinton | New York Cornell 

 Sta. Bpt. 1896,pp. 477-498, figs. 12).— A reprint of Bulletin 120 of the station (E. S. h\, 

 8, p. 477). 



The texture of the soil, L. II. Bailey {New York Cornell Sta. Rpt. 1896, pp. 467-478, 

 fills. 3).— A reprint of Bulletin 119 of the station (E. S. R., 8, p. 176). 



Removal of the fertile soil from the farm by water, J. T. Rothrock {Pennsyl- 

 vania He/it. Agr. Rpt. ]896, pp. 396-41)-', pi. 1). — A popular discussion of the fertili- 

 zing value of the material removed from soil by surface washing and the means of 



