2(^5 



ol" .sotbi with aud without supeiphospiuite, and of barnyard manure. 

 The beneficial effects of nitrate of soda were apparent Avith all the varie- 

 ties. (2) Experiments as to the yield of yellow and blue lupine and 

 serradella, both grass and stubble, under the most advantageous condi- 

 tions, the results of which are not yet reported. (3) A comparison of 

 sowing lupine broadcast and in drills. This exi^eriment was made on 

 eight plats, each 25 square meters in area, on lour of which the seed 

 was broadcasted at the rate of 175 pounds per acre, and on the other 

 four drilled at tiie rate of 80 pounds per acre. The results showed that 

 at the time of blooming 85.2 i)er cent of the seeds capable of germina- 

 ting had produced plants where the seed was broadcasted and 92.4 per 

 cent where the seed Avas drilled. In the laboratory studies were made 

 (1) on the effects of adding kainit and carnallite to lime soils; (2) 

 on the relation between the free fatty acids and the spoiling of feed- 

 ing stufis; (3) on the changes in finely ground feeding stuffs by long- 

 exposure to the air; (4) on the culture of the oil turnip and its value as 

 a fodder plant; aiul (5) on the culture and composition of Sfachys fuher- 

 ifera. The results of these experiments have not yet been published. 

 The investigations upon the changes in feeding stuffs showed, among 

 other things, that by lying exposed to the air for G months linseed 

 meal lost not less than 73 per cent of its fat. 



Wiesbaden ; Prof. U. Fresenius, director. — Five hundred and ninety- 

 one analyses were made during the year, most of which were in 

 connection with the control of fertilizers and feeding stuffs. 



To the above reports of Prussian stations the reports for 1890 of 

 the station at Rostock and the seed-testing station at Hohenheim are 

 appended. 



BoHtock; Prof. R. Meinrlck, director. — The number of analyses of 

 various materials and tests of seeds made during 1890 was 4,877. Of 

 these there were 730 samples of fertilizing materials, 45 per cent of 

 which were Thomas slag. Adulterations of the latter with Eedonda 

 phosphate were noticed in 23 cases. Three separate cargoes of Thomas 

 slag, imported diiect from England, were each found by the author to 

 contain Redonda phosphate. Of feeding stuffs 704 samples were ana- 

 lyzed, the larger part being of peanut aud cotton-seed feeding stuffs. 



Field experiments were made to determine the best time for apply- 

 ing nitrate of soda to winter and summer grains, the results showing 

 that in general the nitrate should be applied just as the x>h^nt begins 

 its vigorous growth but before it has commenced to shoot upwards. 

 A comparison of the effects of different nitrogenous fertilizers for oats 

 showed for the first year the following relative action as based on the 

 best result at 100: Ammonium sulphate 100, ground meat 72, ground 

 bone G5, ground leather 59, dried blood 58, and ground lioi m :v.>. The 

 ])lats receiving nitrate of soda met with an accident, but the results up 

 to that time appeared to be similar to those with ammonium suli>hate. 

 Feedhig experiments were made with cows as to the effect of food on 

 1033G— Xo. 4 5 



