FIELD CROPS. 463 



Analysis of commercial fertilizers sold in Maryland, H. B. McDonnell 



ET AL. {Mart/land A(jr. Col. Quart., 1003, No. 21, pp. 54). — The results of analyses of 

 489 samples of fertilizers examined from March to June, 1903, are reported, with 

 notes on valuation, the text of the State fertilizer law, and a brief discussion of pro- 

 posed amendments of the law. 



Complete report on commercial fertilizers for 1902, J. H. Stewart and B. H. 

 HiTK ( West ]'lrgiiiia Sta. Bui. 83, pp. 110). — This report contains a list of the fer- 

 tilizers registered for sale in the State during the year and the results of analyses, 

 with notes on the operation of the new fertilizer law and the source and value of 

 various fertilizing materials. 



Licensed commercial fertilizers, F. W. Woll ( Wisconsin Sta. Bui. 100, pp. 

 3-1'i, IS, 19). — The text of tlie State fertilizer law is given and analyses of 17 samples 

 of fertilizers licensed in the State during 1903 are reported with a brief general dis- 

 cussion of the subject of fertilizers. 



FIELD CROPS. 



Report on work at the Ploti Experiment Field in 1901-2 {Rap. An. Sta. 

 Expt. Aijroii. I'lotij, S {1902), pp. 1.^9-142). — The work has been continued along 

 former lines (E. S. R., 14, p. 340), but has been extended. This season winter wheat 

 after corn yielded 930 kg. of grain and 2,400 kg. of straw, and winter rye after a 

 cereal crop 960 kg. of grain and 480 kg. of straw per hectare less than a crop grown 

 on cultivated fallow. Green manure seemed to increase the yield of winter wheat 

 over cultivate<l fallow. These results were obtained on the extension of the experi- 

 ment fields and represent only 1 season. 



The results on the older portions of the field showed that the time of cultivating 

 fallow was of great importance in growing winter wheat, and that it affected in a 

 large measure the succeeding summer crop. The bare fallow gave the best yields of 

 Avinter wheat and summer barley. Fallows cultivated in April and May gave about 

 equal yields, ])ut the quality was nuich in favor of April cultivation. A field under 

 a 9-year rotation, including crops of leguminous forage plants of long periods of 

 growth, produced much better yields of winter wheat and summer cereals than a 

 field under a 4-year rotation. 



Deep plowing produced the larger yields of sugar beets and winter wheat, while 

 shallow plowing gave the larger yields in spring wheat. Shallow cultivation in 

 growing winter wheat and oats by the Owsynski method was unprofitable this season 

 as compared with deej) cultivation. 



Plats receiving bai'uyard manure showed an increase of 70, 56, and 28 per cent in 

 the yield of wheat, lentils, and beets, respectively, as compared with the check plats. 

 The addition of phosphates to barnyard manure had effect on the sugar-beet crop 

 only, the increase in yield as compared with the mannred land being 68.5 per cent. 

 The results with complete fertilizers containing no calcium carbonate showed an 

 increase of 12 per cent for cereals and 26 per cent for sugar beets over a complete 

 application containing the substance. The use of superphosphate seemed to increase 

 the weight of the grain of winter wheat, oats, barley, and lentils. 



Annual Report of the Burdwan Experimental Farm for the year 1901-2, 

 D. N. Mookeru {Calcutta: Dept. Land Records and Agr., Bengal, 1903, pp. 13). — A 

 description of the farm is given, and the results of fertilizer, culture, and variety 

 tests are reported. The chemical composition of 2 samples of the surface soil is also 

 shown. 



A mixture of bone meal and nitrate of potash, among different fertilizer applica- 

 tions for paddy, gave the best returns. This has been uniformly the case since the 

 beginning of the experiments in 1891. Jute plowed under forgreen manuring, when 



