84 REPORT OF OFFICE OF EXPERIMENT STATIONS. 



interesting? results during the year with reference to accuniuhition of 

 hir^^e amounts of nitrate in the soil and to bacteriological conditions 

 in the soil. AVork was continue(Las) in previous years on plant lice," 

 alfalfa blight, seepage, and evaporation. 



Aside from these Adams fund projects, the station conducted ex- 

 periments, mainly in continuation of previous work, on a large num- 

 ber of subjects, including irrigation and evaporation; arsenic poison- 

 ing of fruit trees; plant diseases; potato and fruit culture, particu- 

 larly on the western slope of the State; breeding of grains, alfalfa, 

 and cantaloups; investigations on the potato flea beetle, the codling 

 moth, brown mites, and red spiders; spraying for insect pests and 

 plant diseases; methods of making concrete fence posts; and feeding 

 experiments with cattle, sheep, and swine. 



Among the more important recent practical results of the work of 

 the station are the discoveries of the cause and efficient means of 

 treating a destructive bacterial disease of alfalfa, the nature and 

 danger of arsenical poisoning of fruit trees, the occurrence of rapid 

 nitrification in certain soils, and the efficiency of one spray as com- 

 pared with two or more. 



The outside work of the station, supported largely by state funds, 

 consists of potato experiments near Greeley and on the western slope; 

 various horticultural investigations on the western slope; experi- 

 ments mainly with cantaloups and alfalfa at Rockyford; and dry 

 land experiments at Chej^enne AVells. 



The last legislature appropriated $10,000 for farmers' institutes 

 for the bienniuin ending Decemljer 1, 1910, and most of the mem- 

 bers of the station staff have taken part in this work. The railroads 

 of the State have cooperated by furnishing special trains. A special 

 series of farmers' institutes was conducted during the year on the 

 plains of eastern Colorado, in cooperation Avith a representative of 

 this Department. 



The following publications were received from this station during 

 the year: Bulletins 181, Ar.-enical poisoning of fruit trees; lo2, De- 

 struction of concrete by alkali: 18o, A few^ orchard plant lice; 134, 

 Orchard plant lice and their remedies; 135, The Australian saltbush 

 {Atriplex tiemihaccata) : Its composition and digestibility; 130, Dew- 

 berry growing: 137, Some animal diseases; 138, Some bacterial dis- 

 eases of plants; 139, Pruning nuiture fruit trees; 140, Strawberry 

 growing in Colorado; 141, Grape growing; 142, Tillage, fertilizers, 

 and shade crops for orchards: 143, Cabbage growing on the irri- 

 gated lands of Colorado; and 144, Celery growing in Colorado; 

 Circulars 1, Potato notes; and 2. Hog raising in Colorado; and the 

 Annual Reports for 1907 and 190s. 



See Colorado Sta. Buls. V.y.i ami 134. 



