No. 2, March, 1921] AGRONOMY 95 



tabular data are given, showing the correlation between degrees and duration of cold, ice 

 formation inside the kernel, moisture content of the kernel, embryo discoloration, and loss 

 of vitality. — Cultural practices relative to the selection and preservation of seed corn 

 are discussed, and experimental data are presented in support of the conclusions. — T. A. 

 Kiesselbach. 



624. Koch, Pieter. Cotton culture. Jour. Dept. Agric. Union of South Africa 1:615- 

 622. 1920. 



325. Lee, S. C. Electrical treatment of seed. Agric. Gaz. Canada 7:248-249. 1920.— 

 Further investigations on electricall}^ treated seed as compared with untreated seed on the 

 trial grounds of the Manitoba Agricultural College, are briefly reported. A plot of Marquis 

 wheat sown with electrically heated seed yielded 3| bushels more grain and 533 pounds 

 more straw than the check. The plot showed a ranker growth and ripened more slowly. 

 Rust affected both plots equally. — 0. W. Dynes. 



626. Lemmerman, D. Untersuchungen iiber verschiedene Diingungsfragen. [Investi- 

 gations concerning various fertilizing problems.] Arbeiten der Deutsch. Landw. Ges. 297. 

 198 p. 1919. — The author reports various experiments, most of which were carried on at 

 the Society's experimental fields in Dahlem, near Berlin. The following investigations are 

 reported: The effect of fertilizing with nitrogen, phosphoric acid, potash, and lime, with 

 and without stable manure on yields and on the fertilizer balance in the soil, 23 p.; Green 

 manure studies, 25 p. ; On the influence of organic substances on the nitrogen in fertilizers 

 and in soils, 5 p. ; Investigations with nitrogenous fertilizers, 48 p. ; with phosphate, 17 p. ; 

 with potash, 8 p.; with lime, 9 p. There are also included meteorological tables and many 

 pages of tabulated data. — A. J. Pieters. 



627. Liehr, O. Der Mohn, sein Anbau und seine Verwertung. [The culture and uses of 

 poppy.] Fiihlings Landw. Zeitung. 68: 191-198. 1919. — A popular discussion of the culture 

 and uses of poppy for the production of seed and its products. The yield, composition, 

 quality, and uses of poppy oil and the by-product, poppy cake, are shown and discussed in 

 detail. — A. T. Wiancko. 



628. Loft, Selm ar. Determining dry matter in root crops. Seed World 7" : 21-22. 1920. 

 — The author gives the testing methods used by Danish seed growers to secure the desired 

 results. Dry-matter determinations are described in detail, giving the methods of drawing 

 samples, washing, and sawing the roots, and the treatment of the final samples. — M. T. 



Munn. 



629. Meek, B. C, and R. N. Makin. Farmers' experiment plots. Potato experiments, 

 1919-20. Central western district and south coast. Agric. Gaz. New South Wales 31: 621- 

 625. 1920. — Yields are given of different varieties of potatoes with and without fertilizers. 

 Fertilizers generally gave very favorable results. — L. R. Waldron. 



630. Meek, B. C, and H. Bartlett. Farmers' experiment plots. Maize experiments 

 1919-20. Central-western and north-west districts. Agric. Gaz. New South Wales 31: 703- 

 706. 1920. — Conditions generally were adverse, and the results were not of particular value. 

 Irrigated plats yielded as high as 68 bushels per acre. — L. R. Waldron. 



631. Mitscherlich, E. A. Ein Beitrag zur Standweite verschiedener Kulturpflanzen. 

 [A contribution regarding the spacing of various crops.] Fiihlings Landw. Zeitung 68: 121-129. 

 1919. — Results of experiments with various thicknesses of planting potatoes, mustard, bush- 

 beans, and hemp. The largest yields were secured from stands of plants per hectare as 

 follows: potatoes, 33,333; mustard, 10,300,000; bushbeans, 800,000; hemp, 267,000. In the 

 case of mustard, it is stated that broadcast seeding at a somewhat thicker rate might be 

 expected to give still larger yields. — A. T. Wiancko. 



