lime per acre were incorporated into the surface 6 inches of soil.
Subsequently, 3 tons of calcitic lime and 2 tons of dolomitic lime
were surface applied to the established sods. Phosphorus and K
were surface applied primarily as ordinary superphosphate and
potassium chloride to provide total quantities of 450 and 1,300
pounds per acre of P and K, respectively, through 1970. The
superphosphate was also the primary S source. In 1952, at ini-
tiation of the grazing experiment, and in 1957, Mn, Cu, and Zn
were applied as sulfates to supply 7.9, 7.9. and 7.6 pounds per
acre of each, respectively, and B as borox to supply 0.68 pounds
per acre. In 1967, a micronutrient frit (FTE 503 which con-
tained 18.8% Fe, 7.5% Mn, 7.0% Zn, 3.0% Cu, 3% B, and 0.2%
Mo) was applied at 30 pounds per acre.
 Results from the experiment were reported in detail else-
where (4)1, but the importance of the results warrants discus-
sion of the three basic treatments. The treatments were: 1
none; 2, N only at 400 pounds per acre in 1971 and 200 pounds
per acre in 1972 and 1973; and 3, N, P, K, Mg, S, and FTE 503
at 400, 43, 165, 76, 100, and 30 pounds per acre, respectively, in
1971 and 200, 21, 84, 76, 100, and 30 pounds per acre, respec-
tively, in 1971 and 200, 21, 84, 76, 100, and 30 pounds per acre
respectively, in 1972 and 1973. Individual plots were 8 by 15 feet.
Plots were harvested four times per year-approximately May
15, July 1, August 10 and October 1. Composite soil samples were
taken from each replication in March 1971, and from individual
plots in October of each year. Forage samples were dried at
70 C, and ground by a stainless steel Wiley mill with 20-mesh
screen. Soil and plant samples were analyzed by procedures
previously described.
 Results
 Soil analyses.-The original objective with respect to liming
was to increase pH of the surface soil (0 to 6 inches) to 6.0 to
encourage white clover growth. Because of the pH dependency
of the cation exchange capacity (CEC), increasing soil organic
matter, and poor distribution and slow reaction of surface-ap-
plied lime, this pH was not measured regularly until 1968, at
which time the total lime application was 7 tons per acre (Table
6). Soil pH remained above 6.0 from 1968 through 1972 without
additional lime.
 Ammonium actetate (pH 4.8) extractable nutrients were

 1Numbers in parentheses refer to, Literature Cited at the, end of the
chapter.