Pastures for Florida


when nitrogen was used with phosphorus and potash or with an
application of phosphorus, potash and lime. The growth of carpet
grass treated with fertilizer (nitrogen, phosphorus, potash) and
lime was appreciably more during the entire season than that of
grass treated with nitrogen alone. A complete fertilizer (nitro-
gen, phosphorus and potash) was used without lime, with dolo-
mitic limestone and with ground limestone (Table 3). Yields
from plots treated with complete fertilizer and lime were slightly
more than those from the complete fertilizer alone. These yields
show that either ground or dolomitic limestone is satisfactory,
but that carpet grass yields on established pastures were in-
creased only slightly by lime applications.


20.o0


-- o fertiliir.


/


 10*. N inhtrOjen) ts
 March and August. / --
-- b lib. F (nitrogen), }b lb. /
 P205 (phoaphorte acid),
 12 Ibe. KXO (potash), ad n/ \
 500 lbs. It.. in Iarc /\
 amually: and 3b lbs. i /
 in \ og t.
 / /\ \

 // \
 / /


4.o L


 July 1
Clipping Dates. 1940


A*g. I


I I


Sept. 1 Sept. 27


 FIG. 15.-MORE FERTILIZER, MORE GROWTH.
Growth curves of carpet grass as affected by fertilization on a Leon fine
 sand during the 1940 season, Gainesville.

 In another series of tests on 4 soils, 200 pounds of superphos-
phate (18o P205), 50 pounds of muriate of potash (50% K20)
and 500 pounds of ground limestone per acre were applied an-
nually from 1937 to 1940, inclusive, to compare with the yields
of carpet grass which was fertilized with 800 pounds super-
phosphate, 200 pounds muriate of potash and 2,000 pounds of
lime in 1937 only. Both treatments received identical nitrogen
applications annually. The 1937 and 1938 yields show that car-


w u Jttus I


I


I \


12.0

8.0


Apr. 1