2 AGRONOMY [BoT. Absts., Vol. X, 



bushel weight and percentage of flour yield also were higher. The protein content of both 

 wheat and flour was higher and the loaf expansion greater. — Carleton R. Ball. 



6. Franck, W. J. Het onderzoek van Cietenzaad aan het Ryksproefstation voor Zaadcon- 

 trole. [Examination of beet seed in the government agricultural experiment stations for seed- 

 control.] Cultura 33: 155-168. 1 pi. 1921. — The author discusses for beet seed sampling of 

 seed, germination of seed, examination of water contents, purity of the variety, and occurrences 

 of disease. — J. C. Th. Uphof. 



7. Gerlach. Die Ernahrung der landwirtschaftlichen Culturpfianzen im zeichen des 

 Phosphorsauremangels. [Fertilizing agricultural plants in view of phosphoric acid shortage,] 

 Arbeit. Deutsch. Landw. Ges. 300. 79-91. 1919. — The author reviews some of the work on 

 fertilizer experiments to bring out the influence of phosphoric acid. He points out that the 

 quantities of phosphoric acid that had commonly been applied were greatly in excess of those 

 removed by crops, and concludes that the greatest part of the mineral soils in the German 

 Empire contained before the war such considerable quantities of active phosphoric acid com- 

 binations that, under a regular stable-manure agriculture, the application of phosphoric acid 

 may be reduced or omitted without material decrease in yields. — A. J. Pieters. 



8. Hansen. Die Fiitterung unter besonderer Beriicksichtigung des Eiweiszmangels. 

 [Feeding with especial reference to the lack of albuminoids.] Arbeit. Deutsch. Landw. Ges. 

 300. 68-78. 1919. — A general review is presented of sources of proteins for feeding purposes. 

 The author suggests a more extensive culture of legumes and oil-producing seeds. The 

 American and the Swiss systems of making silage are compared; the results of 1 experiment 

 are reported to show that there is a much greater loss of proteids in the American silo than in 

 the Swiss fermentation chamber. — A . J. Pieters. 



9. Hansen, R. Symbiotic nitrogen-fixation by leguminous plants with special reference 

 to the bacteria concerned. Sci. Agric. [Canada] 1: 59-62. 1921. — The present paper, read 

 before the Western Canadian Society of Agronomy, deals with the work of the author in con- 

 junction with the late T. J. Burrill in Illinois. It was shown that the root nodules of other 

 than leguminous plants are not caused by the bacteria which are found in the nodules of 

 Leguminosae. Leguminous plants may be grouped according to whether or not they can be 

 cross-inoculated by certain bacteria. This grouping may depend on similarity of cell sap in 

 root tissues, or on the existence of specific enzymes secreted by the bacteria. — B. T. Dickson. 



10. Lehmann, E. Die Grundlagen der Fiitterungslehre einst und jetz. [The funda- 

 mentals of feeding theories, past and present.] Arbeit. Deutsch. Landw. Ges. 300. 48-67. 

 1919. — The author reviews past and current theories governing the study of the value of 

 feedstuffs. — A. J. Pieters. 



11. Little, L. G. Field experiments with cereals. Glen Innes experiment farm. Agric. 

 Gaz. New South Wales 32 : 403-409. 1921. — In trials of early and mid-season wheats sown for 

 grain. Clarendon and Early Haynes Bluestem yielded decidedly highest and these varieties 

 resisted rust. Early Haynes Bluestem gave the highest hay yield. — In trials of late-sown 

 wheats, Cleveland yielded 32 bushels followed by Red Fife, 22; Kanred, 20; Huron, 18; Mar- 

 quis, 17; Haynes Bluestem, 16; Kharkov, 9; and Red Rock, 2. Kanred showed practically no 

 rust while Haynes rusted badly. — In oat-variety trials Smyrna stood highest in yield of grain 

 and second in hay yield. Fulghum, Kherson, and Sixty Day gave rather low yields. — L. R. 

 Waldron. 



12. Maiden, J. H. Four newly recorded weeds. Agric. Gaz. New South Wales 32: 396. 

 1921. — Brief notes are given on Calandrinia caulescens Menziesii (HBK) Gray, Sisymbrium 

 altissimum L., Orthocarpus purpurascens Benth., and 0. erianthus Benth. — L. R. Waldron. 



13. Merkel. Sortenversuchsbericht. Saatzucht-Abteilung. [Report on variety tests. 

 Seed breeding section.] Mitteil. Deutsch. Landw. Ges. 36: 308-313. 1921.— The author 



