1019] HELD CROPS. 637 



The production of wheat In the Tropics, A. E. Himi'Iirifs (Trans. 3. 

 Tnternat. Cong, 'I'mj,. Agr. i9t). mi. >, pp. t—19). — Wheal production nt the 



higher altitudes in the Tropics is discussed with Special reference to the program 

 made in growing the crop in Rhodeflla, Hritish East Africa, and tropical Aus- 

 traln, where It is said to he exotic, and in India and the Sudan, where It 1b 

 described bb Indigenous. 



Report of trial shipment of bulk wheat from Vancouver via the Panama 

 Canal to the United Kingdom, V. .1. Rir( hard and A. W. Ai.cock f /'< /J. Trade 

 and Com. [Canada] Grain Research Lab. Bui. 1 (1918), pp. 19, figs. 19). — This 

 describes observations made upon temperature changee occurring in a bulU 

 shipment of wheat and on the final condition of the grain In a trial trip made 

 during the fall of 1017. 



It was concluded from the results obtained that if certain precautions are 

 taken wheat may be carried to Europe from Vancouver via the Panama ('anal 

 without damage. It is stated that only quite sound wheat, with a moisture 

 content not exceeding 14. f> per cent, should be shipped by this route. The tem- 

 peratures became dangerously high only in those portions of the ship close to 

 the engine room, stokehold, and propeller-shaft tunnel, and well ventilated or 

 extended air spaces are deemed essential for the proper protection of the grain 

 cargo. Except near the stokehold bulkhead the only damage observed in this 

 shipment was from " sweating," and the necessity of keeping the cargo dry dur- 

 ing loading and the prevention of the subsequent entrance of water into the 

 holds is emphasized. The lengtb of the voyage was regarded as an undesirable 

 feature, and It is suggested that the use of slow ships be avoided. 



The storage of English wheat, F. W. Saxry (Jour. Hath ami West and 

 Smith. Counties Soc., 5. ser., 12 (1917-18). pp. 20-26).— The author discusses 

 briefly methods of storing the wheat obtained in England through increased 

 production, owing to its high moisture content (from 15 to 10 per pent) the 

 storage of English wheat is said to offer a rather serious problem to both the 

 farmer and miller. 



Some cultivated yams from Africa and elsewhere. T. II. Rikkii.t. (Gardens' 

 Bui. Straits Bettl., 2 (1918), No. 3, pp. 86-92, pis. 3, figs. 2).— Some unfamiliar 

 cultivated yams are briefly described and illustrated, including Diosoorea eag- 

 enensis, D. belophylloi&ee, D. ttwnetorwn, and different varieties of 7). pento- 

 phi/ila. 



[Report of the Official Seed Testing Station of England and Wales] 

 (Jour. Bd. Agr. [London], 25 (1918), Xo. 6. pp. 6fl-668, fig. 1).— This com- 

 prises the first annual report of the station, dealing with purity and germina- 

 tion tests of 7,744 samples of seed received during the year ended July 31, 1018. 



Injurious weed seeds in feeding stuffs. H. B. SlFTOR (Agr. Ota. Canada. .'> 

 (1918), No. 10, pp. 951-957, figs. 11). — A microscopic examination of ground 

 feeding stuffs which proved to be unpalatable or actually injurious to cattle, 

 are said to have revealed the presence of certain undesirable weed seeds in 

 the feed. Among the common weeds Identified were Brassiea arrensis, Erysi- 

 mum cheiranthoides, Thlaspi orvense, Sisymbrium altissimum, Agrost ctmn a 

 githago, and Saponaria vaccaria. The various kinds of mustard are deemed 

 most troublesome. 



Objectionable weed seeds and their harmful effects "are briefly described. The 

 Judicious use of a 1/14-in. perforated zinc screen is suggested as a satisfactory 

 means for removing most of these seeds. 



Weeds of the wheat fields of the Pampa. J. Wii i iamkon (MM. Agr. Nac. 

 [Buenos Aires'], Dir. Gen. Ensenanzn e Invest. \>jr. [Pub.] Xo. 79 [1918), pp. 

 2'{, figs. l-li). — Some of the more prevalent weeds found in the wheat tit Ids of 

 116338°— No. 7—19 4 



