FIELD CROPS. 235 



Plnnts bavins n lishl green colored foliage appeared to snffer the most from 

 frost. Among the different varieties the Tnrkestan was better than any other 

 in tendency to root down from the crown branches and was eaten by horses in 

 I»refereuce to ordinary kinds. The heaviest seed-yielding varieties of 1 year 

 I)roved best in the following year as well, but it is pointed out that although 

 seed-yielding tendency may be affected by hereditary traits, it is doubtless more 

 generally influenced by climatic and cultural conditions. 



Experiments in the production of brewing barleys, H. Dammann (Rev. 

 /y/^•^ Af/roii. Moiitcridco, l!)09, \o. .7, pi). 201-211). — Plat experiments testing a 

 mixture of potash, lime, nitrogen and phosphoric acid and the same mixture save 

 for the omission of each of these plant foods in turn showed the highest yield 

 when all were applied but a lower protein content than in any case save when 

 nitrogen was omitted, when the protein content was only 7.75 per cent. The 

 lowest yield of grain and highest protein content followed the omission of 

 phosphoric acid from the mixture. 



In field tests of the same ])lant foods and of manure, the highest yield of grain 

 was obtained after an application of potash, phosphoric acid, and nitrogen to 

 land fertilized the preceding year with uiti'ogen, ithosphoric acid and manure, 

 while practically the same yield was obtained on a iilat unfertilized but fer- 

 tilized the preceding year with manure. All other plats gave lower yields. On 

 each plat, the 190S crop had been potatoes and the 1907 crop wheat. 



In a variety test Svalof Hannchen produced the highest yield of grain. 

 Svalof Prinzessin had the highest protein content, although the lowest yield of 

 grain. 



Experiments on the cultivation of forage and sugar beets, H. Dammann 

 (Rev. Inst. Agron. Montevideo, 1909, No. 5, pp. 213-221). — Meteorological data 

 for the period of the experiment are presented. The last of August was found 

 to be the best date for planting and plantings of one plant to each 800 to 900 sq. 

 cm. (from 124 to 139.5 sq. in.) produced the highest yield of sugar per acre. 



Fertilizer experiments with sugar beets, J. Graftiau (Ann. Gemhloiix, 

 20 (1910), No. 2, pp. 65-71). — An analysis of the soil on which the experiments 

 were conducted is given. Each plat was fertilized with superphosphate and 

 sulphate of potash at the rates of 600 and 200 kg. per hectare (534 and 178 lbs. 

 per acre) respectively. Nitrate of soda (calcium cyanamid), and sulphate of 

 annnonia with and without lime, were tested as sources of nitrogen. The plat 

 fertilized with calcium cyanamid produced less than three-fourths as much 

 sugar as did each of the others, and the proportion of leaves and crowns to roots 

 was much greater. 



Fertilizer experiments with, sugar beets, E. Saillard (Jour. Agr. Prat., 

 II. Her., 19 (1910), No. 9, pp. 267-269). — Nitrate of soda, calcium cyanamid, and 

 lime nitrate applied with potassium and manure produced 5,513, 5,527, and 5,785 

 kg. of sugar per hectare respectively, while on plats fertilized with (1) potas- 

 sium chlorid, (2) kainit and potassium chlorid, and (3) without potassium but 

 with nitrate of soda and manure the yields of sugar were 4,848, 5,221, and 4,651 

 kg. per hectare, i-espectively. 



Tests of the cultural value of varieties of corn, H. Dammann and J. 

 ScHROEDEK (Rev. Seec. Agron. Univ. Montevideo, 1908, No. //, pp. 185-202, pis. 

 ^i). — Rejjorts are given of tests of 18 North and South American varieties of 

 corn and of 12 North American varieties separately re])orted. The dates of 

 planting, sprouting, flowering, and harvesting are reported for each variety 

 as well as the average height of the plant, weight per hundred grains and per 

 hectoliter, the yield per plat and per hectare, and the chemical analysis of each 

 variety. The highest yields were obtained from Hickory King and Iowa Gold 

 Mine. 



