No. 1, February, 1921] AGRONOMY 3 



15. Brown, Ernest B. Relative yields from broken and entire kernels of seed corn. 

 Jour. Amer. See. Agron. 12: 196-197. 1920.— A lower percentage of the broken seed germi- 

 nated, and the seedlings were weaker than those produced by whole kernels. In weight of 

 ear and yield per plant the broken seed produced consistently less than did the entire seed. 

 The broken seed produced 7.6 bushels less per acre than did the entire seed.— F. M. Schertz. 



16. Bruce, J. L. Rotation of crops. New Zealand Jour. Agric. 20:94-96. 1920.— A 

 6-year rotation for dairj- farms is suggested. This included 3 years in grass; 1 year in roots; 

 1 year in flax, barley, beans, potatoes, linseed, etc.; and 1 year in oats and tares.— iV. J. 

 Giddings. 



17. C, C. The roast beef of old England. [Rev. of: Mackenzie, R. J. J. Cattle and the 

 future of beef production in England. With a preface and chapter by F. H. R. Marshall. 

 xi^-168 p. University Press. Cambridge, 1919)]. Nature 105:62-63. 1920.— Author 

 considers a supply of prime beef necessary to a sound system of agriculture. The increase of 

 plow-land at expense of grass-land during the war is now in process of reversal, and this may 

 proceed at an increasing rate unless there is evidence of greater profit in crops other than 

 grass. — 0. A. Stevens. 



18. Calvino, Mario. Estudio sobre el cultivo de la soya en Cuba. (A study regarding 

 the cultivation of the soy bean in Cuba.) Rev. Agric. Com. y Trab. [Cuba] 3: 124-131. 9 fig. 

 1920.— Trials of 13 varieties of soy beans {Soja max L.) are described with reference to germi- 

 nation, time of emergence, length of growing season, yield and nutritive value.— i^*. M. 



Blodgett. 



19. Cockayne, L. An economic investigation of the montane tussock— grassland of New 

 Zealand. New Zealand Jour. Agric. 20: 82-94. // fi^. 1920.— Several depleted areas which 

 have been protected by rabbit-proof fences are showing great improvement. A reasonable 

 amount of pasturing apparently does not interfere with the regeneration. Valuable forage 

 grasses spread from the tussocks, and many seedling plants soon develop. The plants 

 found in these areas are listed. — ^V. /. Giddings. 



20. CoLWELL, W. R. Under irrigation with bore water. Agric. Gaz. New South Wales 

 31 : 476-477. 2 fig. 1920. — Excellent returns were obtained from Sudan grass at the Coon- 

 amble Experiment Farm with the assistance of irrigation from bore water.— L. R. Waldron. 



21. Downing, R. G. Sugar-beet growing in Victoria. Agric. Gaz. New South Wales 

 31:463-465. 1920.— Summary of results showing profits made by farmers and how sugar- 

 beet production is related to other phases of crop production.— L. R. Waldron. 



22. Faber, Harald. Foreword by Sir Robert Greig. Forage crops in Denmark. 

 ix + 100 p. Longmans, Green and Co. : London, 1920.— This volume, written in English, 

 describes the progress that has been made in recent years in the improvement and culture 

 of forage crops and the development of the trade in guaranteed seeds in Denmark. The book 

 is of unusual interest to all engaged in the development and utilization of improved crops 

 and in the betterment of the seed trade. One-half of the work is devoted to root crops. Fol- 

 lowing the investigations of Fjord published in 1890, which showed that the dry matter in 

 roots was equal in feeding value to grain for cows and swine, the acreage of root crops in 

 Denmark has been increased sevenfold; namely, from 95,000 acres in 1888 to 678,000 acres in 

 1919. Before this time breeding of improved root crops had made considerable progress, the 

 iniative being due both to progressive farmers and to enterprising seed firms, who later 

 formed the "Society for the Production of Home-Grown Seed." The success achieved in 

 developing and establishing improved strains of root crops has been remarkable, and since 

 1894 has been assisted by the government. The methods employed are described in detail.— 

 The improvement of grasses in Denmark began with the work of P. Nielsen in 1869. He 

 introduced the system of testing grasses in small duplicate plats instead of in large fields, 



