732 



EXPERIMENT STATION RECORD. 



a marked decrease In yield in all plats from the first to the fourth year. 

 Similar results were obtained in another test. 



The results of a three-year cultivation test showed a yield of 14.97 tons of 

 green Japanese cane per acre with 2-in. depth of cultivation. This was an in- 

 crease of 1.36 tons over that with 4-in. and 6-iu. depths. 



Velvet beans grown on the same land for six years showed an irregular de- 

 crease in yield of beans from 25.13 bu. per acre to 9.63 bu. 



A variety test of sweet potatoes for 1912 showed Unknown to be the heaviest 

 yielder of commercial potatoes, 148.7.5 bu. per acre, with Porto Rico Yam and 

 Triumph closely following. 



One year's test showed sweet potatoes to be a desirable silage crop, keeping 

 in perfect condition and eaten by cattle and hogs readily. Cassava silage also 

 gave good results. Both crops were ensiled in the ordinary way. 



Culture experiments at the experiment field at Bromberg in 1913, G. 

 RicHTEB (Mitt. Kaiser Wilhclms Inst. Landw. Brombeifj, 6 (1914), No. 3, pp. 

 U3-191, pi. 1, figs. 6).— This reports weather conditions from 1907-1912 and 

 irrigation results on sandy and on heavy soils with rye. grass, beans, cabbage, 

 tomatoes, fruit, sugar beets, stock beets, and turnips, and data as to the water 

 condition of the soils. 



It is noted that irrigation proved satisfactory, that one application proved 

 best, that with an application of 130 mm. of water an increased yield of 1,450 

 kg. of dry matter per hectare was obtained over no irrigation while an appli- 

 cation of ISO mm. did not materially increase the yield, that none of the irriga- 

 tion experiments were profitable, that the proportion of grain to straw was 

 increased by irrigation, and that kernel weight increased with irrigation. 

 A table showing the amount of water necessary to produce 1 kg. of winter rye 

 on sandy soil follows: 



Amount of water necessary to produce 1 kg. of n-inter rye on sandy soil. 



A brief resume is given of the effect of adding humus to sandy soils in 

 1908-1912 with oats, potatoes, and rye. 



Cultivation of east Prussian low moorlands. — I, Report of the experiment 

 fields on the overflowed moors of the Bledau estate near Cranz, Feldt 

 (Veroffetitl. Preuss. Landw. Eammern, No. 1 (1914), pp. 90, pis. 12). — This dis- 

 cusses methods of drainage and cultivation suitable for such soils and gives 

 some results of cultural and variety tests with cereals, beans, potatoes, and 

 vegetables. 



Report on the Cawnpore Agricultural Station in the United Provinces for 

 the year ended June 30, 1913, B. C. Burt kt al. (Rpt. Cawnpore [India^ 

 Agr. Sta., 1913, pp. 33 -{-Ga, figs. 5). — This report includes results of exiDcriments 

 with artificial manures, calcium cyanamid, calcium nitrate, and green manures; 

 variety tests with cotton, pigeon peas, great millet, sugar cane, peanuts, maize. 



