No, 33.] 135 
as follows: Two A. one, two hundred pounds superphosphate, 
two A. two, four hundred pounds, two A. three, eight hundred 
pounds, and two A. four, sixteen hundred pounds. Two A. five 
received none. In 1883 no fertilizer was applied. The yield of 
sound corn from the not-root-pruned half for the two years is as 
below: 
Fertilizer in Yield per acre. 
PLAT. 1882. 1882. 1883. 
AN ec) 0 ag Swe we ase None. 38.7 bush. 54.5 bush. 
DMR Mars Sate Cs a cielve wa a cas 200 lbs. Ait, eee ae RE 
eee ee ol an 400 ‘< 4B oT 3 ey ae 
SAS aan 800 * 48.7 * 58.0 . §§ 
Ee os oa aha op. § nine,» 1,600 *§ at Ny BS EAL: ye 
Pero ac tetas. ie o's.5! ¢ crotg le 46.8 56.9 
We first note that there is about the same average increase of 10-1 
bushels, as seen in Series one A., with a variation of twelve bushels 
per acre between the plats in 1882, and 3.9 bushels per acre in 1883, 
and the increase in neither case seems commensurate with the amount 
of fertilizer used. | 
It is quite probable that the seasonal influence in respect to the ap- 
propriation of fertilizer is very great, as also in its relations to cultiva- 
tion, and hence there must exist such an uncertainty of a few seasons’ 
results as to forbid generalization... Both 1882 and 1883 were seasons 
of less than usual temperature, and 1883 of more than the usual 
moisture in the soil. ‘This seems a true explanation, as the potato, a 
plant for a cool season, showed influence of previous application of 
fertilizer. | ‘ 
DISTANCE OF PLANTING. 
To determine the best distance for the planting of corn is very de- 
sirable. It seems certain, however, that distance must vary with the 
variety grown, and with the rainfall and general climatic conditions 
of the locality. In general, this question must be settled for a local- 
ity by local observations. 
One of the difficulties which beset us here, as well as elsewhere, in 
plat experimentation, is the uncertainty which attends the interpreta- 
tion of results. It is hence worth while to present a study of dupli- 
cates, before giving our figures, and if we fail of a conclusion, yet we 
may hope to acquire some information as to the limitations to close 
experiment which prevails in this class of work. 
A series of plats, each of one-twentieth of an acre, were prepared 
and treated as duplicates, the fertilization being at the rate of four 
hundred pounds of superphosphate per acre. The D. series planted 
May 18, the E. series May 19. The variety Waushakum, six ker- 
nels in a hill, afterward thinned to four, and the hills forty-two by 
forty-four inches apart. 
Sound corn. Soft corn. 
dd nod Ce Spmeneainge ARIAS 2: ENP 227 lbs. 3 ozs. 39 1bs. 64 ozs, 
Cc ae Pa Dail gel la eae TUBT ir MeO nce ak Geen 
Bo apes RRR) lh ence 71s oneal on 12 bed Milaits Lowongan ok 4 
RET Lor... s «aisha eccia ciaa.e ce Toe es LO ene SES Le 2: LO aaa 
MER es Mesh. dtr ss eo s'es LOOP DE GOs eee 
