Journal of Agricultural Research 
Vol. XXI, No. II 
852 
total, production op laterals on the mother shoots 
Reference to Tables I and II gives a general idea of the total length 
of all laterals produced upon the 324 mother shoots measured. * 1 It is 
at once evident that there is pronounced variability in the total amount 
of new wood produced by individual mother shoots. The mother 
shoots which had been pruned in the preceding winter produced an 
average total growth of 251.5 ±4.9 cm. The total shoot production of 
the pruned mother shoots ranged from 85 cm. to 685 cm., with an inter¬ 
quartile range of 148.53 cm. and a coefficient of variability of 44.91 
per cent. The unpruned mother shoots produced an average total growth 
Fig. 
-Frequency distributions of total shoot growth on mother shoots. The solid line indicates dis¬ 
tribution on pruned shoots and the broken line distribution on unpruned shoots. 
of 140.5 ±5.3 cm. The total length of new shoots on unpruned mother 
shoots ranged from 75 cm. to 325 cm., with an interquartile range of 
71.44 cm. and a coefficient of variability of 37.82 per cent. So far as 
these figures go, there is, therefore, slightly more variability in the total 
amount of new wood produced by the pruned mother shoots. The 
graphs in figure 2 show the nature of the two populations when the 
quantity of new wood produced is used as abscissa and the frequency 
as ordinate. The class range for the growth on the pruned shoots was 
60 cm. and that for the growth on the unpruned shoots was 50 cm. 
1 The presentation of the actual measurements of the laterals would fill several very large tables. While 
I realize that these measurements should be published, it seems best in the interests of economy to sum¬ 
marize the data and give them in Tables I and II. The complete data are on file at the Citrus Experiment 
Station, and copies will be sent to workers who feel that they might profit by them. 
