Table XXI. — Summary of 100 chemical applications made near Freeland, Pa., 1921 
360 
Journal of Agricultural Research 
Vol. XXXI, No. 4 
8 
i XX X 
+XXXXX M XXXXXXXX , ftftftXXKxXXXXx wm 
XXXXXXon°°XXXXXX l iXX >< ^ l *!xxKxXXXXoXmooXX.3X 
XXXXXX *nnXXXXXX* 5BSXX3XXXXX~ 
.X 
ooKKKKKK* SBSXX3XXXXX~ H" Q >< 
XXX X 
a 
X 
X 
X 
X 
X 
x xx x x x 
^XXXX m^- v^XXX^^u^ Xw^Xm^ w wX 
XXXXXOQXXXXX o oQXXXXaQXXoQXo^XXXXxoo O o C K 
WWWW nw WWW+J4J p^w -mKS ^n^j^ox ws -" O +3 +3^ 
X 
xxxx 
'XXX 
XX 
X 
X 
X X 
X 
X 
o o 
XX 
,X 
oxxooooooox.XpX.oooooooEjooooxoxxoooooXXXoX 
XX 
X, 
X X 
X^ X 
X' 
X X 
X~ X 
|?S 
=Mixed with the soil by spading. S=Surface application. *>0=No growth; (X) =growth barely possible; X=poor growth XX=fair growth; XXX=normal growth. 
