RELATION OF FERTILISERS TO SOIL FERTILITY. 29 



was applied, from 0-05 to 0-20 grams per pot. The maximum increase in 

 yield was obtained by the application of 0-10 gram per pot; use of larger 

 quantities only producing slight increases. 



W. VAN DAM. (Chem. Weekblad, 1907, 4, 391-397.) When seeds are soaked 

 in MuSO 4 solution, or MuSO 4 is used as a fertiliser, the yield is increased. 



GIOVANNI SALOMONE. ( Staz. Sper. Agrar. Ital., 40, 1907, 97-117. ) Experiments la- 

 the fields confirm the results. (See previous abstract.) MnSO 4 , Mn (NO 3 ) 2r 

 and MnO 2 exert the most beneficial influence on corn. A table is. 

 given showing the useful and toxic proportions. One grain Mn per square 

 metre improved growth of meadow grass. Fifty kilos of MnSO 4 per 

 hectare benefit wheat ; above this quantity, toxic. 



KJALMA VON FEILITZEN. (J. Landw., 1907, 55, 289-292). The soil, chiefly de- 

 composed sphagnum peat, had been under cultivation since 1894. Ail 

 application of 10 kilos of MnSO 4 per hectare had no effect on oats. 



S. UCHIYAMA. (Bull. Imp. Centr. Agric. Exper. Station, Japan, 1907, 1, 37-39.) 

 Plots experiments. The soil was a diluvial loam, rich in organic matter, 

 containing 0-414 of MnSO, soluble in hot HC1, and 0-07G soluble in citric 

 acid 1 per cent. "Wheat and barley showed very little effect with MnSO 4 , 

 whilst grasses, buckwheat, radishes, carrot, Brassica campestris, and tea 

 plants were considerably benefited. The amount of MnSO 4 varied from 10 

 to 37-0 kilos per hectare as Mn 3 O 4 . Better results were obtained when 

 applied as a top-dressing. Further experiments in bottomless cylinders 

 showed that with barley the grain and total yield increased 18 per cent, 

 up to 24 per cent, by 25 kilos of Mn 8 O 4 per hectare. 



WALTER F. SUTHERST. (Transvaal Agric. Journal, 1908, 6, 437.) Experiments 

 in pots 3 feet high, with an area of about 1 square yard. Mn was applied 

 as MnCl 2 2 grammes, MuSO 4 2 grammes, and Mn 2 O 2 5 grammes per pot. 

 Mn 2 3 gave the best results. 



ACII. GREGOIRE, J. HENDRICK, and EM. CARPIAUX. (Bull. Ind. Chim. Bacter. 

 Gembloux, 1908, N. 75, 00-72.) Fifty kilos per hectare of MuSO 4 gave an 

 average increase of 7 per cent. Smaller amounts, 10 kilos, no effect. No 

 sensible results in case of sugar beet. 



JOHN A. VOELCKER. (Journ. Roy. Agric. Soc. England, 1907, G8, 264-2GG.) LiCl 

 and Li 2 SO 4 had a bad effect on wheat. FeSO 4 , MnCl 2 , and MnSO 4 , not more 

 than 1 cwt. per acre, acted beneficially. 



SIGURD RHODIN. (K. Landtbr. Akad. Handl. Tidskr., Stockholm, 1908, 30-32.) 

 Experiments inconclusive. 



T. TAKEUKI. (J. Coll. Agr. Imp. Univ. Tokyo, 9109, 1, 207-10.) Different 

 plants were grown in the same soil in pots, both with and without MuSO 4 

 (MnSO 4 4 H 2 O, 0-2 grams in 8 kilos of soil). The increase clue to Mn was 

 as follows : Barley 5-3, flax 13 9, pea 19 4, spinach 41 per cent. 



M. DE MOLINARI. (Ann. Gembloux, 1908, 009.) Manganese, zinc, copper, and 

 ferrous sulphate failed to increase the yield of oats and barley. The soU 

 contained, however, a good deal of manganese. 



F. MACII. (Ber. Grossh. Bad. Landw. Versuch Anst. Augustenb, 1910, 51, 5.) 

 Application of MnSO 4 in pots and field experiments seemed to have no 

 result on the growth of tobacco. 



V. NASARI. (Atti. R. Accad. Lincei, 1910 (v), 19, ii, 361-367.) From experi- 

 ments in laboratory and in the field on germination of wheat the Author 

 finds MnO 2 , MnSO 4 . MnCO 3 to exert a favourable influence on the growth of 

 the plant. 



BABTMANN. (Jouru. Agr. prat. n. ser., 20 (1910), N. 47, p. GG6.) The Author 

 describes some experiments where Mn was applied as MnCl 2 , MnCO 3 , MnO 2 , 

 MnSO 4 , and two products from Mn mines, consisting primarily of Mn 2 O t 

 and Mn 3 O 4 . Beets, peas, and beans were considerably increased in yield 

 by MnCO a , whilst MnO 2 , MnCl 2 , MnSO 4 had but little effect, as also the 

 products from the mines. 



