FIELD CROPS. 229 



7" (1909), No. 3, pp. 25-29). — An account is given of comparative experiments in 

 wbich a 10 per cent solution of lime nitrogen, 2 and 4 per cent solutions of cop- 

 per sulphate, and a 20 per cent solution of iron sulphate were compared. 



The most eflicient treatment, as shown by the reduction in the number of 

 plants of wild radish and field mustard, was on the plats sprayed with the 

 solution of iron sulphate, followed by the solutions of copper sulphate. The 

 solution of lime nitroyen, however, considerably reduced the number of weeds 

 on a given area, and when its fertilizing value is taken into consideration its 

 employment as an herbicide has certain advantages. 



Xenia in Solanacae, E. Griffon (Bui. 8oc. Bat. France, 55 (1908), No. 9, 

 pp. 71Jf-720, pi. 1). — Desiring to determine whether the phenomenon of xenia 

 was exhibited in the hybrids of a number of species of solanaceous plants, the 

 author conducted some breeding experiments with tomatoes, different varieties 

 of eggplants, and common peppers. In all 9 hybrids and about 30 specimens 

 were under observation. As a result of his study, the author claims that there 

 was nothing that showed with certainty the existence of xenia in the fruits of 

 these plants. 



FIELD CROPS. 



The Woburn field experiments, J, A. Voelcker (Jour. Roy. Agr. 8oc. Eng- 

 land, 6S (1907), pp. 2'i2-266; Separate, pp. 27).— The year 1907 was the begin- 

 ning of the fourth decade these experiments have been in progress. The man- 

 ner of conducting the work has been previously described (K. S. R., 19, p. 22G), 

 but beginning with this year some modifications were made. Sulphate of am- 

 monia was substituted for the mixture of equal parts of sulphate and muriate 

 of ammonia. The quantities of nitrogen in the applications were reduced one- 

 half, the double application equivalent in nitrogen to 50 lbs. of ammonia being 

 retained in some cases for comparison. The mineral fertilizers were reduced 

 to a general application of 3 cwt. of mineral superphosphate of lime and i cwt. 

 of sulphate of potash per acre. Only one-fourth of the previous application of 

 rape dust (14 cwt. per acre) is now used. The barnyard manure is now ana- 

 lyzed, and the actual quantity required to supply 100 lbs. of ammonia per acre 

 is given. The treatment of 2 plats with rape dust and barnyard manure, re- 

 spectively, was discontinued, 3 cwt. of superphosphate of lime and 1 cwt. of 

 nitrate of soda per acre being used instead of the rape dust, and 1 cwt. each of 

 sulphate of potash and nitrate of soda instead of the manure. The results se- 

 cured on all plats are given in tables with brief discussions. 



In the continuous wheat-growing tests lime given with sulphate of ammonia 

 produced a marked beneficial effect. The best quality of wheat was secured on 

 the rape-dust plats, the unmanured plats and those receiving only minerals 

 standing next. Nitrate of soda gave wheat generally inferior in quality. The 

 continuous barley-growing tests also showed the marked effect of lime in rais- 

 ing the yield when used in conjunction with sulphate of ammonia. The plat 

 receiving 1 cwt. of nitrate of soda per acre produced 31 bu., 2 cwt. of nitrate of 

 soda 36.4 bu., 1 cwt. of nitrate of soda with minerals 35.6 bu., and 2 cwt. with 

 minerals 42.8 bu. per acre. The highest yield, 45.8 bu. per acre, was obtained 

 on the piat receiving 100 lbs. of ammonia in barnyard manure. The best qual- 

 ity of barley, and the only product fit for malting in the series, was secured on 

 the plat given per acre mineral fertilizers and 25 lbs. of ammonia as sulphate 

 and treated in 1905 with 1 ton of lime. 



A rotation experiment was conducted " to ascertain the difference of ma- 

 nurial value obtained by the consumi)tion of, in the one case, decorticated 

 cotton cake, and in the other, of maize meal, by sheep feeding off roots on the 

 land [and], to ascertain what would be the difference of manurial value be- 



