84 



Field F. — Plant l)reeding experiments with rye, winter wheat, 

 spring wheat, oats, sugar beets, and potatoes. Fertilizer experiments 

 with oats and sugar beets. 



Field F {%o\x\)ix of plant-breeding plats). — Clover, tests of 30 varie- 

 ties of different origin; spring wheat, 8 varieties; potatoes, breeding 

 experiments with 4 varieties. 



Field F (east of plant-breeding plats). — Sugar :uid fodder beets 

 (experiments with different distance^s of planting); potatoes, 5 varie- 

 ties; peas, 2 varieties. 



Field G. — Oats, Gottinger and Beselers improved, with clover. 



Field IT. — Root crops: Sugar beets, mangel- wurzels. Potash fer- 

 tilizer experiments. 



Field I. — Square-head wheat. 



In the trial garden small plats are grown of all plants of agricultural 

 importance to northern (xerman}', the different kinds of grasses and 

 fodder plants, cereals, root crops, small fruits, weeds, etc. Mixtures 

 of graisses and leguminous plants are also grown under different sys- 

 tems of fertilization, to study the effect or to obtain demonstration 

 material for showing the effect of certain fertilizers in favoring the 

 growth of some plants and checking that of others. Similar experi- 

 ments were also conducted during the season of 1901 in pots in the 

 greenhouse, under liberal or scant supplies of water, in the study of 

 the effect of water supply on the action of different fertilizers or com- 

 binations of such. 



Pot experiments are conducted in the greenhouse shown in PI. XVII. 

 The dimensions of the greenhouse are 23 by 19 feet, with a workroom 

 added, 13 by 36 feet. It has accommodations for about 600 pots, 

 which are placed on trucks and in good weather alw^ays kept outside. 

 The experiments are conducted according to the plan worked out at 

 the Darmstadt station. The general problem studied during late years 

 is the influence of the water suppl}^ on the utilization of different 

 kinds of fertilizers by cereals, grasses, and other farm crops. The 

 laboratory- investigations are chiefly supplementar}^ to experiments 

 conducted in the field, garden, or greenhouse, the main work of the 

 assistants being the chemical anal3^sis of materials harvested, soils, 

 fertilizers, etc. A great deal of independent research work has, how- 

 ever, also been conducted in the laboratory, and has from time to time 

 been published in the periodical literature, especially in the Journal 

 f iir Landwirtschaf t. 



L'thmry and museum. — A description of a German agricultural 

 institute would be incomplete without a mention of its librar}^ and 

 museum, both of which form all-important parts of the facilities for 

 instruction and research. The library of the Gottingen Agricultural 

 Institute is small, less than 3,000 volumes, but is very complete in 

 German works on agriculture and allied subjects. To an American 



