11
The mean and variance of the distribution are equal toic. The usual procedure is to make a number of observations and the mean of these, x, provides an estimate of/Land r2.
The negative binomial is defined by 2 parameters, the mean and a positive exponent k. The distribution is generally expressed by the expansion of
(q-p) where k)0, p= /, and q= l+p.
The expansion of the probability is given by
p = (k + x -1) px x = 0,1,2,.
x x (k -1) qk + x
With increasing randomness, the variance of the distribution approaches the mean and the Poisson more accurately describes
the distribution.
Effects of Defoliation on Peanut Plant Growth and Yield
Typically, peanuts in Florida are planted from early
April to late May; in exceptional years spring droughts delay some planting until June. 'Florunner', released in 1969, is the most widely grown peanut cultivar in the United States. Over 80'% of the peanuts grown in Florida are 'Florunner'
Peanuts exhibit an indeterminate growth pattern. The plant growth of 'Florunner' is prostrate with the typical
sequential branching pattern of Virginia type varieties-i.e. alternate pairs of reproductive and vegetative nodes
on laterals and no reproductive nodes on main stems.
'Florunner' peanuts grown under normal conditions in Florida begin flowering at ca. 30 days after planting; peak