



ALMOND VARIETIES IN THE UNITED STATES iL 7 
F. Stem scar ventrally sloping when all the nuts in a variety have stem scars 
sloping ventrally with reference to the axis. The number of varieties 
belonging to this class is small. 
Each of the above classes is divided into five subclasses based 
upon the prominence of the wing, or flanges, and easily recognized 
by actual measurement, as follows: 
I. Wing very prominent when some portion of the wing projects a distance 
equal te one-seventh the total width of the nut or greater. 
II. Wing medium in prominence when the wing projects a distance of less rae 
one-seventh and more than one-tenth the width of the nut. 
Ill. Wing not prominent when the wing WB neGIs a distance of less than save 
twelfth the width of the nut. 
IV. Wing not prominent to medium prominent when the wing varies in the 
variety so that some nuts come under II and some under III. 
V. Wing medium to prominent when the wing varies in the variety so that 
some nuts come under I and some under II. 
These subclasses are each grouped into three divisions based upon 
the ratio of the width to the length of the nut, by measurement as 
follows: 
1. Very long nuts, averaging 1.8 as long as wide or longer. 
2. Very short nuts, averaging 1.25 as long as wide or shorter. 
3. Nuts of medium length, averaging less than 1.8 as long as wide and greater 
than 1.25 as long as wide. 
Each of these groups is divided into the following subdivisions, 
based upon the ratio of the thickness to the width of the nut: 
(1) Nuts very thin; thickness averaging five-eighths the width or thinner. 
(2) Nuts very plump; thickness averaging five-sixths the width of the nut 
or thicker. 
(8) Nuts medium in thickness; thickness greater than five-eighths the width 
of nut and less than five-sixths the width of the nut. 
Each of these subdivisions is divided into two further divisions, 
based upon the character of the ventral edge: 
a. Ventral edge ridged. It should be noticed that the term ‘“ ridge’ here does 
not refer to the wing, or flange, but to.a marked longitudinal ridge or cor- 
rugation at some distance from the wing and parallel to it, accompanied by 
a wide longitudinal depression between the ridge and the wing. Such ridges 
and accompanying depressions may occur on one or both sides of the ventral 
edge. 
6. Ventral edge smooth. When no marked ridges or ventral depressions as 
described in @ occur. 
The next divisions are based upon some of the characteristics of 
the kernels as they appear about two months after the nuts are har- 
vested, although sufficient latitude is allowed so that the character- 
istics apply to any kernel. 
A kernel is (@) thin when the thickness is one-half the width or less; (0b) 
plump when it is two-thirds or more as thick as wide; (¢€) medium when the 
thickness is greater than half the width and less than two-thirds the width. 
The dorsal shoulder of a kernel may be square and humped or gently curving 
and sloping. 
The kernel is said to be pubescent when the pubescence on the pellicle is 
heavy and abundant; it is smooth when the pubescence is very slight or occurs 
at apex only. This characteristic is very constant. 
Norr.—Recent improvements in cracking machinery will result in 
slightly higher percentages of kernel in machine-cracked nuts than 
those given in this bulletin. 
99729°—24——_2 
i ii 
