1 Grades No. 1 and No. 2 shall not include hay that stained.

(c) Grade designations for Grass hay. Grade designations for Grass hay shall include after the words "Grass hay" either (1) such local trade names as will identify the kind of grasses, sedges, and/ or rushes; or (2) the common name of the various kinds of grasses, sedges, rushes, and legumes which constitute more than 10 percent of the mixture, written in the order of importance. Grasses which cannot be identified can be described by the term "miscellaneous grasses."

(d) Special grades for Grass hay-(1) Extra Green hay-(1) Requirements. Extra Green hay shall be hay of any of the grades of the class Grass hay in group X which has 65 percent or more green color, but shall not include hay that is stained.

(1) Grade designation. When the special grade Extra Green is applicable there shall be added to and made a part of the grade designation, preceding the name of the class, the words "Extra Green."

Example: U.S. No. 1 Extra Green Grass hay, Redtop and Bluegrass.

(2) Green hay-(i) Requirements. Green hay shall be hay of any of the grades lower than grade No. 1 of the class Grass hay in group X which has 50 percent or more but less than 65 percent green color, but shall not include hay that is stained.

(ii) Grade designation. When the special grade Green is applicable there shall be added to and made a part of the grade designation, preceding the name of the class, the word "Green."

Example: U. S. No. 2 Green Grass hay, Red

top.

§ 57.13

Mixed hay (Group XI).

(a) Class and class requirements. The group Mixed hay has one class, namely, Mixed hay, which shall be any mixture of hay not classified in the groups I to X, inclusive, but which contains 50 percent or more singly or in combination of alfalfa, timothy, clover, upland grasses, midland grasses, grasses (as defined in § 57.1 (k)), Johnson grass, grain hay, vetch hay, lespedeza, soybean hay, cowpea hay, and peanut hay.

(b) Grades for Mixed hay-(1) Grade requirements. Mixed hay shall be graded according to the grade requirements and the specifications in §§ 57.1 through 57.12 for the kind of hay which predominates in the mixture, except that all numerical and special grade specifications pertaining to leafiness, stemminess, coarseness, and fineness shall be disregarded.

(2) Grade designation. The grade designation for Mixed hay shall include successively, in the order named, (1) the letters "U. S."; (1) the number of the grade or the words "Sample grade", as the case may be, and any special grade that may apply; (iii) the words "Mixed hay"; and (iv) the name and approximate percentage of each kind of hay which constitutes more than 10 percent of the mixture listed in the order of decreasing percentages.

Subpart B-United States Standards for Straw

clude not more than 10 percent (of the total straw) of timothy and other grasses that are not coarse and woody.

(b) Chaf. Chaff shall be shattered glumes, and pieces of straw not over 4 inches in length.

(c) Foreign material. Foreign material shall be matter other than straw, except grasses that are not coarse and woody.

§ 57.51 Principles governing application of standards.

The following principles shall apply in the determination of the grades of straw:

(a) Basis of grade determinations. (1) The determination of chaff, foreign material, temperature, odor, and general condition shall be on the basis of the straw as a whole.

(2) The determination of color shall be on the basis of the method prescribed by the Grain Division, Agricultural Marketing Service, United States Department of Agriculture.

(b) Methods of determining percentages. Percentages of chaff and foreign material shall be ascertained by weight. § 57.52 Grades for straw.

(a) Numerical and sample grades and grade requirements for straw.

(b) Grade designation. Grade designations for straw shall include successively in the order named: (1) The letters "U.S."; (2) the number of the grade or the words "Sample grade," as the case may be, and any special grade that may apply; (3) the words "Wheat straw," "Oat straw," "Barley straw," "Rye straw," or "Rice straw," as the case may be. In the case of mixed straw the names of the different kinds of straw shall be given in the grade designation.

(c) Special grades for straw--(1) Straight Rye straw (1) Requirements. Straight Rye straw shall be rye straw of

any grade which has been threshed without opening the sheaves or permitting the straw to pass through the threshing machine and which has been pressed into large box-pressed bales.

(11) Grade designation. When the special grade Straight is applicable there shall be added to and made a part of the grade designation, preceding the name of the kind of straw, the word "Straight." Example: U. S. No. 1 Straight Rye straw.

(2) Long Rye straw(i) Requirements. Long Rye straw shall be rye straw of any grade which has been threshed without opening the sheaves or permitting the straw to pass through the threshing machine and which has been pressed into perpetual-pressed bales.

(11) Grade designation. When the special grade Long is applicable there shall be added to and made a part of the grade designation, preceding the name of the kind of straw, the word "Long."

Example: U.S. No. 2 Long Rye straw.

(3) Chaffy straw-(1) Requirements. Chaffy straw shall be Wheat straw, Oat straw, Barley straw, Rye straw, or Rice straw, as the case may be, of any grade which contains more than 35 percent of chaff.

(11) Grade designation. When the special grade of Chaffy is applicable, there shall be added to and made a part of the grade designation, preceding the name of the kind of straw, the word "Chaffy." Example: U.S. No. 2 Chaffy Wheat straw.