34 BULLETIN" 336, 17. S. DEPARTMENT OF AGRICULTURE. 



vigorous, the stems are more slender, and the heads and kernels are 

 both smaller. The kernels are yellow in color and usually quite well 

 developed. 



Ivanof. — The Ivanof rye, C. I. No. 34, was introduced into this 

 country from Russia by Prof. N. E. Hansen in 1898. In general 

 appearance and plant characters it is practically the same as the 

 Mexican. 



Bimpau. — The Rimpau rye, C. I. No. 126, was introduced from 

 Germany in 1910. The seed was purchased from Mr. W. Rimpau, 

 a noted German cereal breeder, Schlansted, Saxony, and was known 

 as "Old Breeding." It is a rather more distinct variety than any of 

 those previously mentioned. It is decidedly the latest maturing rye 

 included in the tests at Arlington. The leaves are much broader 

 than those of other varieties. Because of this character it is more 

 frequently recommended than others where a hay variety is desired. 

 The heads are drooping, very large, nearly square, and are borne upon 

 a large but not very stiff straw. The kernels are medium long, broad, 

 shrunken, and blue in color. The quality of grain in the Rimpau 

 variety is inferior to that of any other included in the trials at Arling- 

 ton. The shrunken condition of the kernel is apparently due more 

 to an inherent characteristic of the variety than to environment. 



The Rimpau selection is a pure line of this variety which was 

 selected at Arlington Farm with the intention of improving the qual- 

 ity of grain, although no marked improvement was effected. The 

 straw of tins particular strain was quite weak, and for this reason it 

 was discontinued. 



Henry. — The original source of the Henry rye, C. I. No. 138, is not 



known. This rye when pure is quite different in appearance from any 



other here discussed and it usually can be identified readily. The 



heads are short and very broad at the base, giving them a spear-shaped 



appearance. The kernels are quite similar to those of the Abruzzes, 



except that they are a little lighter brown in color. In yield the 



Henry rye has been less satisfactory than the Giant or Virginia 



Winter. 



EXPERIMENTS WITH WINTER OATS. 



Fall-sown oats succeed much better than spring oats in southern 

 and eastern Maryland and in Virginia east of the Blue Ridge. Spring- 

 sown oats give fairly good results in particularly favorable seasons, 

 but the crop is not at all a reliable one. Therefore, most of the ex- 

 perimental work that has been done at College Park and Arlington 

 Farm with oats has been with fall-sown varieties. 



Varietal tests of winter oats have been conducted in field plats at 

 College Park since 1908 and at Arlington Farm since 1911. Prior to 

 1911 this crop was grown only in the nursery at Arlington Farm. 

 The trials at College Park during the seven years have included 13 



