The Bulletin. 



59 



hnlf nbout July first. On still two other plats (IS' and 7') the 

 uitroucn was supplied l).y dried blood, oiic-lmlf being applied before 

 ]»l;iiitiii,i:\ with the phos]ihoric acid and potash, and the other 

 linlf about July first. On two more ])lats (\'>^ and S') four- 

 fiflhs of the nitrogen was fnrnishod by dried blood and one-fifth by 

 nitrate of soda, and was all applied before jilanting, along with the 

 ])hos])horie acid and i^otash. The total yields and increased yields 

 over unfertilized jilats were quite uniform on the two fields in all 

 the years and do not show any decided advantage of either nitrogen- 

 furnisbirig material over the other or any one of the nietliods of ap- 

 plication over the others. The average results gave a slightly larger 

 ]n-ofit for nitrate of soda as the soni-ce of nitrogen, when two api)lica- 

 tions of nitrogen were made, one-half just before planting and the 

 other about duly first. 



Takin"- into consideration the additional cost of making the second 

 application of nitrogen, the best returns have come from an applica- 

 tion of all of the fertilizer in the drill before planting and having 

 four-fifths of the nitrogen sujiplied as blood and one-fifth as nitrate 

 of soda. The additional e.xpense of dividing the ap])lication of nitro- 

 gen and api)lying one-half before planting and onedialf later is not 

 justified by the e.xpcrimcnts. It is to be borne in mind that the soil 

 on which these tests were made is a clay loam with a good clay sub- 

 soil and the danger from loss by leaching is very slight, if any. 

 It is quite clear from si.x years work on this soil with an a]i]-)lication 

 of 300 pounds per acre that the most economical way of applying the 

 fertilizer is to put it all in the drill before planting the crop. The 

 results might be different on sandy loams or sandy soils. 



IREDELL TEST FARM; EFFECTS OF DIFFERENT METHODS AND TIME 

 ICATION. 



IN 1903, '04. 'Oe, AND '08. 



