February, 1910.] 



131 



Scientific Agriculture. 



been found in various carts of the 

 kingdom, whilst only one instance has 

 been noticed where the grass apparently 

 had no effect. This variation in 

 intensity with the nature of the soil is, 

 probably, the chief reason why the 

 action is not more widely recognised ; 

 but two other causes contribute to an 

 under-estimation of the grass effect, the 

 one that it is very rare for a plantation 

 to be partly grassed in such a way as 

 to give satisfactory evidence as to the 

 bad effect of this grassing; the other, 

 that the grassing is generally effected 

 gradually, extending througout several 

 seasons, and in that case, it has been 



found the effects are far less marked 

 than they otherwise are, the trees, 

 apparently, becoming gradually adapted 

 to the altered conditions. 



No definite connection has yet been 

 found between the nature of the soil and 

 the intensity of the action, but it does 

 not appear to be governed by the rich- 

 ness of the soil. The case, alluded to 

 above, in which the action has been nil, 

 cannot be explained by any greater 

 depth of soil into which the tree roots 

 penetrate, thus getting away from the 

 grass roots, for many of the trees have 

 been lifted, and all have been found to 

 have their roots near surface. 



MISCELLANEOUS. 



LITERATURE OF ECONOMIC 

 BOTANY AND AGRICULTURE. 



By J. C. Willis. 



Green manuring :— 



Leaf manuring in S. Canara. Couch- 

 man. Agri. Journal India 1908. 

 "T.A."Nov. 1908, p. 461. 



Green manuring. Ind. Agric. July 

 1908, p. 221, "T.A." Jan. 1909, p, 61. 



Superphosphate and Basic Slag. 

 Agri. News, VII, 173, Dec. 1908. 



Grevillea :— 



La gomme de Grevillea robusta. 

 Journ. d' Agr. trop. 31. 8. 1908, p. 

 225. Abs. "T.A." Nov. 1908, p. 412. 



Groundnuts :— 



De cultuur der Aardnoten. Ind. 

 Merc. 24. 12. 1898, p. 811. 



Groundnuts as a profitable (?) in- 

 vestment. "T.A.'* June, 06, p. 373. 



Peanuts or groundnuts. " T.A." Apr. 

 1906, p. 216. 



Manipulation des Arachides aux 

 Etats-unis. Journ. d' Agr. trop. 6, 

 1906, p. 358. 



The groundnut. " T.A," Feb. 1907, 

 p. 86. 



Ground or pea nut. Kew Bull. 1901, 

 p, 175. 



Groundnut cultivation in Burma. 



«« T.A." Sept. 1907, p. 197. 

 L'arachide en Afrique occidentale 



francaise. Bull. Jard. Col. 1907, 



p. 186. 



Groundnuts in Burma. Ind. Agric. 

 Mar. 1908, p. 82. 



Cultivation of groundnutsin Malabar, 

 do. p. 83. 



Notes on cultivation of groundnuts. 



Q. J. L'pool I. C. R. Jan. 1908, p, 30. 



"T.A." July 1908, p. 14. 

 The cultivation of groundnuts. Bull. 



Madras Dept. Agr. III. 58. 1908. 



" T.A." Jan. 1909, p. 22. 

 La culture de l'Arachide Aux Etats- 



Unis. Bull. Jard. Col. Nov. 1908, 



p, 422. 



Uber Erdnus-Ausfuhr in Togo, Tro- 

 penpflauzer 13. No. 2. Feb. 1909, 

 p. 81. 



The Origin and Domestication ot the 

 Peanut or Groundnut (Arachis 

 Hypogoea) in the United States, 

 Trop. Life. Feb. 1908. " T.A," June 

 1909, p. 515. 



Disease of groundnuts in Dominica, 

 Agr. News, No, 194, p. 315, Oct. 1909. 



Culture et composition de la Pis- 

 tache ordinaire et de la Pistache 

 Malgacne. Mauritius Bull. No. 

 21, 1909. 



Disease of ground nuts. Agr. News, 

 VIII. 196, Oct. 1909, p. 374. 



Guava : — 



Guava jelly. Agr. News, 27. 6. 1908, 

 p. 196. "T.A." Oct. 1908, p. 338. 



Guizotia : — 



Niger-seed oil, "T.A." Dec. 1905, 

 p. 760, 



Gums :— 



The collection of gum in the Soudan. 



Trop. Life, Aug. 1907, p. 117. 

 La gomme de Grevillea robusta. 



Journ. d'Agr. trop. 31. 8. 1908, 



p. 225. 



Uses, properties, and production of 

 gums. Imp. Inst. Bull. 6. 1908, p. 29, 



