532 EXPERIMENT STATION RECORD. 



00). The general portion of these lectures deals with the morphology, develop- 

 ment, cultivation, and powers of micro-organisms and means of combating in- 

 jurious forms. The specialized portion deals with bacteriology pertaining to 

 feeds, dairy products, soils, and fertilizers. 



FIELD CROPS. 



On the application of the method of least squares in agriculture, O. FbQh- 

 LiCH (Aim. Landtv. Inst. Breslau, 6 (1913), No. 5, pp. 6S3-703, fig. l).—ln this 

 article the author discusses the arithmetical mean, observation errors, the meas- 

 ure of exactness, the law of large numbers, graphical comparisons, and the solu- 

 tion of normal comparisons, and illustrates these from actual practice. 



On the application of the method of least squares, J. Fbischauf (LandAV. 

 Jahrl)., 43 {1912), No. 3, pp. 501-508). — This discusses the relation between the 

 number of observations and the number of constants to be determined, and 

 presents formulas for use in estimating the experimental errors, which are 

 classed as *' accidental " and " systematic " errors. 



On the standing room of individual plants in plant breeding, E. A. 

 MiTSQHERLiCH (Ztschr. PflanzenzucM., 1 {1913), No. 3, pp. 275-285, figs. 2).— 

 The distance between individual plants to be used as breeders should be such 

 as to avoid the influence of both the climatic vegetative factors and the neigh- 

 boring plants. It is noted that the soil should be highly fertilized so as to 

 reduce the possible inequalities in soil fertility. To get satisfactory results 

 from the multiplication plats it is advised that they be 4 by 12.5 meters, ar- 

 ranged in series of 7 each, and repeated 4 times, so that number 1 shall be com- 

 pared with number 7, 2 with 8, and 3 with 9, etc. 



[Demonstration work] {Philippine Agr. Rev. [English Ed.}, 6 {1913), No. 6, 

 pp. 279-296, pis. 5). — These articles comprise notes on crop selection, drainage, 

 preparation of seed beds, methods of planting, soil improvement, and crop rota- 

 tion, and include discussions of demonstration work in the Provinces around 

 Manila by W. A. Mace ; in Iloilo-Capiz by S. H. Sherard ; in the island of Cebu 

 by G. G. Weathersbee ; in the Province of Batangas by H. T. Nielsen ; and in the 

 Mountain Province and Nueva Vizcaya by A. M. Burton. 



[Reports on field crops] {Union So. Africa Depi. Agr. Rpt. 1910-11, pp. 21, 

 22, 29, 30, 229-253, 267-304, 453-466, 4^5-483, 515-518, 523-526, 541-544, 568- 

 592, 603-615, 636-638, 641, 642, pi. i).— These papers give sunimaries of con- 

 tinued work with tobacco, cotton, dry-land farming, maize, strawberry clover 

 {Trifolium fragiferum) and other clovers, Tangier pea {Lathyrus tingitanus), 

 Florida beggar weed {Desmodium tortuosum), serradella, Kanker-bosje 

 {Sutherlandia frutescens), saltbushes {Atriplex leptocarpa canescens), blue 

 grama {Bouteloua gracilis), Australian blue grass {Andropogon sericeus), 

 sisal hemp, goats rue {Galcga offi.cin-alis) , sulla {Hcdysarum coronarium), teff 

 grass, alfalfa, thousand-headed kale, Mitchell grass {Astrehla pectinata), soy 

 beans, Natal sugar beans, Rhodes grass, guinea grass, Kikuyu grass, spineless 

 cactus {Opuniia coccinellifera), New Zealand flax, Algerian spinach {Cheno- 

 podium amaranticola) , chayote {Sechium edule), Helianti, indigo {Indigofera 

 arrecta), tree lucern {Medicago arhorea), weeds, velvet beans, cowpeas, pea- 

 nuts, grain inspection, root crops, potatoes, sugar cane, Kaflr com, wheat, 

 native grasses, and oats. 



New sources of nitrogen {County NorthumT). Ed. Com. Bui. 19 {1918), pp. 

 91, 92). — Slightly inferior yields of oats were obtained with calcium cyanamid 

 than with sulphate of i^mmonia. With oats, hay, and mangels, nitrate of lime 

 compared favorably with nitrate of soda. 



