FIELD CROPS. 829 



Bur clover seed; means of hastening their germination, J. F. Duggar 

 and H. B. Tisdale {Alabama Col. Sta. Circ. 29 (191J,), pp. 113-116).— This 

 describes several methods of soaking aud scalding seed burs of bur clover to 

 hasten germination. 



Tlie most successful method was found to be that of soaking for four hours 

 in water at room temperature and then scalding for one minute in boiling water 

 (212° F.). In nine days 76 per cent of burs germinated by this method as 

 against S per cent witli neither soaking nor scalding. Directions for soaking 

 large amounts of seed are included. 



On the relation of the anatomical coefficients of maize to its heights and 

 the nitrogen content of the kernel, S. Moskviciikv {Zhur. Opytn. Afjron. 

 {Russ. Jour. Ed'pt. Landic), lo {1914). ^^o. 4, PV- 266-281). — In an examination 

 of tive varieties of maize, the data obtained in measuring the stoma of the 

 upper and the fifth leaf (15 samples from each variety), the height of the 

 plants, and the nitrogen content led to the conclusion that with an increase 

 of cell size the height increased and the nitrogen content sank. 



Effect of the submersion of corn, E. Marchettano {Coltivatore, 60 (1914), 

 No. 32, pp. 433-435, fign. 2). — This notes the abnormal development of the male 

 and the female parts of maize as results, apparently, of planting in the sub- 

 merged allu\ial soils of Lower Friuli, where soil may be covered with water 

 to a depth of from 15 to 20 cm. (5.G to 8 in.) for several days. 



Fertilizer experiments with maize, M. Calvino {Bol. Cdmara Affr. Nac. 

 Leon, 4 {1915), No. 1, pp. 4-8)- — This article describes experiments and give.s 

 results showing the value of bone meal, sulphate of potash, gypsum, sulphate 

 of ammonia, and double superphosphate as fertilizers for maize in Mexico. It 

 is noted that the increase in yields has returned from 200.65 to 321.55 per cent 

 interest on the cost of the fertilizers in six months in these experiments. 



The modern cultivation of corn, Z. Dominguez {San Antonio, Tex.: Do- 

 minguez Corn liouU I'nhlishinff Co. [1914]. PP- 351, pis. 4. flgs. 249). — ^An 

 English edition of the Mexican book entitled Agricultura, already noted (E. S. 

 R., 32, p. 131). 



Cotton cultivation in the West Indies, W. Nowell and H. A. Baxlou {Imp. 

 Dept. Agr. West Indies Pamphlet 14 {1914), PP- 118, pi. 1, figs. .35).— Cultural 

 methods are described. 



[Cotton experiments], G. G. Macdonald {Rpts. Finance, Adnmi., and Condi- 

 tion Sudan, 1913, -vol. 2, pp. 143-151). — This report gives results of variety tests 

 which show some American varieties to surpass the ordinary Egyptian varieties 

 at the Tokar experimental farm. Spacing tests showed 70 by SO cm. (27.G by 

 31.5 in.) to be the most favorable spacing for the Assili type and 00 by 100 cm. 

 for the Affifi type. Pruning plants by topping those that showed a tendency to 

 produce wood was found to increase the yield considerably. 



Preliminary work with hybrids of cotton, J. Herrmann {Bol. Agr. [Sao 

 Paulo], 15. ser., No. 6-7 {1914), pp. 559-578, figs. 8).— This discusses prelimi- 

 nary work and gives data in hybridizing Upland and Caravonica varieties of 

 cotton at the Eliza station. 



The influence of some chemical reagents on the sprouting of potato tubers, 

 E. NiCKLiscH {TJntersuchungen iiber den Einflusseiniger ehemischer Agentien 

 auf die Keimfdhigkeit der Kartoffelknolle. Inaug. Diss. Univ. Erlangen, 1912, 

 pp. 51). — This describes experiments and gives the results of the use of sul- 

 phuric acid, hydrochloric acid, sodium chlorid, copper sulphate, carbon monoxid. 

 and carbon dioxid. 



Tubers were immersed in solutions of these chemicals of concentrations of 

 0.5, 1, 2. 3. and 4 per cent for periods of 6. 12. 24. and 48 hours On the basis 

 of his observation of the vegetative conditions of the tubers, the author con- 



