1920] SOILS — FERTILTZKRS. 221 



years at the New .Tersoy Experiment Stations are snnimarizod, the siihstance 

 of wliicli has heen previously noted from anotlier source (E. S. R., 41, p. G27). 



Vegetation experiments with new nitrogenous fertilizers, StiioLZ (Ztftchr. 

 Landic. Kummer Br(iini-<(liirci(/., 88 (l!)l!>). No. 30, pp. f/.l't-.'/.n). — I'ot experi- 

 ments with oats on sandy loam soil to compare tlie fertilizing; values of sodium 

 nitrate, ammonium sulphate, annnonium chlorid, sodium-annnonium nitrate, 

 and potash-ammonium nitrate showed that the ammonium chlorid gave as large 

 grain yields as ammonium sulphate. The best results were obtained with 

 sodium niti'ate. The results obtained with the sodium- and potassium-ammo- 

 nium nitrates, while indicating increases, were smaller than with the other 

 fertilizers. 



Experiments on sand soil showed about the same results, except that they 

 brought out the value of the potassium- and sodium-annnonium nitrates on 

 this soil, especially the hitter. Wliilg increases were obtained in all cases, 

 it is reconnnended that extensive held experiments be conducted to bring out 

 their true relative values. 



Nitrogen bacteria fertilizers, Nolte {Zt.^clir. Landw. Kainmcr Braun- 

 schueig., 88 (1919), No. 39, pp. 437, ^38).— Laboratory tests of three so-called 

 nitrogen bacteria fertilizers, using a nutritive salt solution, are reported. It 

 was found that two of the fertilizers contained free living nitrogen organisms 

 which, however, were able to fix only small quantities of nitrogen under favor- 

 able conditions. A cropping experiment with oats and mustard on sand soil 

 using the bacteria fertilizers with and without ammonium sulphate showed no 

 marked action on the part of the bacteria fertilizers to indicate their value as 

 sources of nitrogen. 



The new valid regulations for the purchase and delivery of nitrogenous 

 fertilizers, Nolte {Zt-%chr. Landw. Kammer Braunschiceig., 88 {1919), No. S9, 

 pp. .'/3S-.'i-iO). — Extracts are given from the German fertilizer laws regulating 

 the sale and delivery of nitrogenous fertilizers. 



Utilizing Inihoflf sludge on land at Plainfield sewage works, J. R. Downes 

 (Enyin. Neu:s-Rec., S-'t (1920), No. 18, p. 859). — Experiments are reported on the 

 use of Imhoflf tank sludge on sandy soil. 



Forty-two bushels of oats per acre were raised on this soil, receiving about 

 40 tons of sludge (containing 75 per cent moisture) per acre. The second 

 year with 3 tons of sludge per acre, placed in the hills only, 50 bu. of corn 

 were raised. It is stated that with sandy soil and a production of approxi- 

 mately 300 tons of sludge per acre per 1,000,000 gal. daily flow of sewage, 

 this method of dis-posal requires between 20 and 25 acres of tillable land per 

 1,000,000 gal. daily capacity. At current prices for labor, gasoline, etc., it 

 requires 45 cts. per cubic yard to disiiose of the sludge in this manner. 



On the basis of 50 bu. of corn per acre it required 1.50 man-hours actual 

 labor to produce 1 bu., plowing to husking included, together with gasoline 

 equal to 0.04 man-hour and the use of a horse for cultivation equal in value to 

 0.06 man-hour, bats, plowing to thrashing included, required 0.7G man-hour per 

 bushel. 



Report on commercial fertilizers, 1019, E. 11. Jenkins and E. M. Bailey 

 (Connecticut State Sta. Bui. 211 (1919), pp. 55-/06').— This bulletin reports the 

 results of analyses and valuations of 542 samples of fertilizers and fertilizer 

 materials collected for in.spection in Connecticut during 1919. 



Fertilizer analyses [and registrations], A. F. Woods and H. B. McDonnell 

 iMd. Agr. Col Quart. No. 87 (1920), pp. //O).— This contains the results of actual 

 and guarantied analyses and valuations of 515 samples of fertilizers and fer- 

 tilizer materials collected for inspection in Maryland from August, 1919, to 

 February, 1920, inclusive, together with a list of 1919 and 1920 registrations. 



II 



