15S 



Effect of (11 fferoit forms of nifrof/rnoiis fcriilizrrs on onts (}>p. J4'.>- 

 158). — Eleveu tMitli-a<:'re plats, the history of which was well known, 

 each received a quantity of muriate of potash or jiotash magnesia sul- 

 phate furnishing 12 to 13 pounds of potassium oxide, and of dissolved 

 boneblack furnishing- 8.5 pounds available phosphoric acid. In achlition 

 to this from 4 to 5 pounds of nitrogen as nitrate of soda or sulphate 

 ol" ammonia, or 5 to pounds as dried blood were applied on seven 

 l)lats, the remaining four i>lats receiving no nitrogen. One plat received 

 Ijarnyard manure. i)otash-magnesia sulphate, and dissolved l)onel)lack, 

 furnishing approximately the same amounts of nitrogen, phosphoric 

 acid, and potash as the other plats rec<'ived. The fertilizer applied to 

 each plat was the same in kind and amount as that applied for corn the 

 pre(teding year. 



The oats (Pringle Progress) were sown in rows 2 feet apart, each plat 

 containing sixteen rows. Quite marked diflerences were noticed in the 

 color of the plants on the dillcit'iit plats. '• r])on jdats whicli had 

 received their nitrogen in the form of suli)hate of ammonia, as well as 

 upon those which had received no nitrogen-containing manurial matter, 

 a light green tint of the foliage was noticed in the earlier stages of the 

 growth of the oats. In the latter case this light green color remained 

 until the maturing began; in the former case (sulphate of ammonia) 

 the color became a deeper green as the season progressed." The crop 

 was harvested August 11. The yields of grain and straw and the dry mat- 

 ter and fertilizing ingredients in the grain from each jtlat are tabulated. 

 Excluding one plat, which was a failure, the yield of giain was smallest 

 on the three plats receiving no nitrogen. ''The ]>lats containing )>ot- 

 ash-magnesia sul])hate as the potash source yielded the largest amount 

 ol" grain; each of these plats received its nitrogen su]»ply in a ditlerent 

 form — ammonium sulphate, blood, and nitrate of soda. * * * In 

 the majority of cases where muriate of imtash has furnished the i)ota.sh 

 the maturing of the crop was somewhat later tlian Avhere snl])hate of 

 potash was used." 



Influence of fertilizers on ilir quant it t/ mid (jinilitii of jinnninmt fothhr 

 crops (p]>. 15'.)-l(i8). — A report of ])rogiess on an exi»eriment l)egun in 

 1884. Previous accounts may be tound in the annual re])orts of tlie sta- 

 tion (see Experiment Station Ibilletin 2so. 2, ])art i, p. 8r>, and Exi>eri- 

 ment Station Eecord, vol. it, \^. '>H{)). In 1890 all the i)lats used in this 

 experiment were lertiliy.ed with (»00 pounds of ground bone and 200 

 pounds of muriate of potash pen- acre. Notes are given on the growth 

 and yield of Kentucky blue grass (roa prafensis), redto^) {Afirostis rnlgn- 

 ris), ]>okhara clover {Mcliiotus alha). sainfoin (Onohri/cliis s((ttra), Khode 

 Island bent grass {Agrostis alba), meadow fescue [Fcstncn pratensis), 

 and herd's grass {Fhlenm pratense)„ and of mixtures of redtoi> with herd's 

 grass and meadow fescue with herd's grass. Analyses with reference 

 to both tlie I'ood and fertibzing constituents are i-e]>oited for meadow 

 fescue, Kentucky blue grass, alsikedover. medium clover, sweet clo\ cr, 

 and sainfoin grown in 1889 and 1890. 



