220 



Summary of results (p. 8). — The conclusions which apply to this 

 year's trials on the Station farm are briefly sunnnarized below. 



(1) Many new varieties produced a larger yield than either Early 

 Eose or Burbank. notably Irish Wonder, producing 389; General 

 Logan, 296; Lombard. 281; American Magiuun Bonuni, 280 bushels 

 jDer acre, while the Burbank and Early Kose produced, respectively, 

 i'09 and 184 bushels per acre. 



(2) The trench system of planting produced no marked effect as to 

 the jaeld over the usual method of planting. The yield was greater 

 for forty-eight out of fifty-five varieties where potatoes were planted 

 14 inches apart in the row than where planted at intervals of 20 

 inches. On the contrary, the proportion of large to small potatoes 

 was in favor of the 20-inch planting. 



(3) Planting large whole potatoes largely increased the yield over 

 planting potatoes cut to two eyes, or cut in two, or small wdiole 

 potatoes. The yield was in direct ratio to the w^eight of seed potatoes 

 planted. The profit in planting large whole potatoes depends largely 

 upon the season and prices of seed and of harvested crops. 



(4) The yield was largely increased by the use of fertilizers con- 

 taining potash. Where fertilizers containing no potash were used 

 there w-as little increase of yield. In every case where potash was 

 \ised the increase was large. The largest yields were obtained when 

 potash was supplemented by acid phosphate and nitrate of soda. 



(5) A profit was uniformly obtained by apj)lying fertilizers in 

 which potash was one of the ingredients; the largest profit came when 

 phosphate and nitrate were used with the potash salt. 



" In general, the conclusions reached this year as to the methods of 

 seeding and the effects of fertilizers agree with those obtained last 

 year, although the seasons were unlike. The results of two years' 

 trials, therefore, would lead us to believe that it is potash which is 

 most needed to enrich the soil of the Experiment Station farm for the 

 production of ]3otatoes. They indicate but do not prove that worn 

 soils of the same class in the Blue-grass region would also be improved 

 by the application of potash. This can be determined positively, 

 however, only by similar experiments on the various farms.'- 



LOUISIANA. 



No. 1. Sugar Experiment Station, Audubon Park, New Orleans. 



No. 2. State Experiment Station, Baton Rouge. 



No. 3. North Louisiana Experiment Station, Calhoun. 



Driiiirtiiicnt of Loiiisiinni State ruircrf<it!i and A(/riciiU iinil mid MrcJiaiiicnl 



CdUcflC 



Director. William C Stubbs. Ph. D. 

 BULLETIN No. 24 (STATE STATION). 

 EicE AND ITS BY-PRODUCTS, W. C. Stubbs, Ph. D. (pp. 364-373). — 

 An introductory article containing notes on an unsuccessful experi- 



