852 EXPERIMENT STATION RECORD. 



dry seasons, the 40 per cent salt in wet seasons. In a wet year both salts reduced 

 the yield of potatoes, but in dry years moderate applications of either salt increased 

 the yield sufficiently in most cases to overbalance the depressions in starch content 

 which uniformly resulted from the application of the salts. In dry years the kainit 

 gave best results on barley. The results on grass lands were inconclusive, although 

 on dry lands and in dry seasons kainit apparently gave best returns. 



On further results of the coniparative fertilizer experiments writh kainit 

 and 40 per cent potash, salt, AV. Schxeidewind {.Tahrb. Dent. Laiidir. GeselL, 17 

 [1902), pp. 30-S3). — A general discussion of this subject, which is more fully pre- 

 sente<l elsewhere (K. S. R., 14, p. 22). 



Arrangements for irrigation and fertilizing on the royal domain of 

 Grafenwerth on the Rhine, R. Schroer {Deut. Landtv. Prest^e, SO {1903), No. 1, 

 p. 3,fi<ji<. 5). 



Fertilizer department, B. E. McLin and R. E. Rose {Rpt. Cumr. Agr. Florida, 

 1901 and 1902, pp. 104-112, App., pp. 1-70). — -An account is given of the conduct 

 and results of the fertilizer inspection in the State, with analyses of a large number 

 of samples of fertilizers. 



Fifth biennial report of the Missouri Agricultural Experiment Station 

 on the enforcement of the fertilizer-control law, H. J. Waters {Mhsonri Sta. 

 Circ. of TnfnriiKiiiou 1(1, pp. 1<>) . — A statement of receipts and disbursements, with 

 analyses and valuations of 184 samples of fertilizers examined during 1901. 



FIELD CROPS. 



Field experiments at Lauchstadt, W. Schneidewind, I). Mevek, and W. Grob- 



ler {Landir. Jahrh., 31 [1902), No. 5-6, pp. 826-908, 963-968).— The results of fer- 

 tilizer and variety tests from 1898 to 1901, inclusive, are reported at some length. 



Maximum yields of root crops were obtained only when barnyard manure was 

 applied in conjunction with commercial fertilizers. This result is attributed to the 

 mechanical effect of barnyard manure on the soil which favors the growth of plants 

 and a consequent greater utilization of plant food. Although a very heavy applica- 

 tion of nitrate of soda was made the quantity of nitrogen tak(Mi up by the plants 

 was increased when barnyard manure was applied in addition to the nitrate. A 

 heavy application of barnyard manure alone gave higher yields of turnips and pota- 

 toes than a heavy application of nitrogen, phosphoric acid, and potash in the form 

 of commercial fertilizers. It was observed that a quantity of nitrogen taken up from 

 barnyard manure produced more substance than an equal quantity taken up from 

 nitrate of soda. The nitrogen from nitrate of soda enters largely into the production 

 of the leaf and is used in this connection to a greater extent than the nitrogen from 

 barnyard manure. From the average results of these tests, the returns from 100 kg. 

 of deep stall manure and barnyard manure for turnips and potatoes, taking its resid- 

 ual effect on a succeeding crop of barley or wheat into consideration, varied from 29 

 to 35 cts. with stall manure and from 22j to 27 cts. with barnyard manure. The 

 variation with each was due to differences in the price of turnips and potatoes. 



Deep stall manure gave larger yields than barnyard manure, but the differences 

 were not in proportion to its larger quantity of readily solu1)le nitrogen compounds. 

 Attention is called to the fact that the losses from deep stall manure when spread 

 upon the field were greater than from barnyard manure which has already sustained 

 considerable losses before its aj^plication, and that hence deep stall manure is more 

 economically applied in quantities not furnishing more nitrogen than is taken up by 

 the growing crop. In an experiment where 40,000 kg. of deep stall and barnyard 

 manure were applied in connection with growing sugar beets, followed by barley in 

 rotation, the nitrogen used by the crops was on an average 26.7 per cent of the quan- 

 tity furnished in the deep stall manure and 23.8 per cent of the quantity given in 



