10 PEAS AND PEA CULTURE 



Jenkins^ found that a crop of peas removed from 

 each acre 47.8 pounds nitrogen, 13. i pounds phos- 

 phoric acid, and 12.7 pounds potash. 



Brooks^ reports that with peas, dried blood gave 

 somewhat larger crop than nitrogen in other forms. 

 When sulphate of ammonia and muriate of potash 

 were used together, the growth was decidedly in- 

 ferior to that where other combinations were used. 

 Newman^ tested seven varieties of peas grown on 

 poor sandy upland with different fertilizers. High- 

 est per cent of germination was 95, as grown on the 

 plot fertilized with acid phosphate. The lowest 

 germination was 66, resulting on the nitrate of soda 

 plot. Peas planted on acid phosphate germinated 

 three to four days earlier, blossomed four to 

 six days earlier, and produced ripe pods 

 six to nine days earlier than those where kainit, 

 nitrate of soda, or cottonseed meal were used. The 

 application of each was at the rate of 400 pounds 

 to the acre. 



Clinton^" reports fertilizer tests with Canada field 

 peas and various other crops. Best returns were 

 secured with acid phosphate and dissolved bone 

 black. Untreated phosphate floats were apparently 

 without effect upon the peas. 



Von Sellhorst^^ states that the yield of peas was 

 largely increased by the use of potash, while nitro- 

 gen was only slightly beneficial. Wagner^^ reports 

 experiments extending over 12 years, which show 



' Ct. Exper Sta. Rpt., 1896, p. 334. 



' Mass. Exper. Sta. Rpt., 1897. 



' Ark. Exper. Sta., Bui. 34. 



"N. Y. Exper. Sta., Cornell BuHclin 201. 



" E. S. R., Vol 17. 



"E. S. R., Vol. 16. 



