NORTH DAKOTA. 213 



with vegetables was almost a failure, but the results with reference 

 to drought resistance of diti'erent forest trees was of interest. It 

 appeared that the trees having a long taproot like the black walnut 

 and those with a vigorous rooting habit like the willow were best 

 able to withstand the dry weather. In diminishing order of drought 

 resistance the species ranked as follows: Jack pine, bull pine, Rus- 

 sian wild olive, black walnut, white willow, green ash, white ash, 

 hackberry, cottonwood, elm, box elder, soft maple, and white birch. 



The veterinarian, in addition to his Adams-fund work, conducted 

 the State Serum Institute and cooperated with the State Live Stock 

 Sanitary Board. 



The chemist conducted an inspection of paints, oils, and varnishes 

 under a State law, and issued a bulletin on the composition of ready- 

 mixed paints as secured in the market. A special donation of $1,500 

 for tests of the serviceability of paints and oils and various mixtures 

 was made by paint manufacturers. The chemical department also 

 conducts inspections of foods and drugs, beverages, fertilizers, and 

 feeding stutl's, and analyzes ilhuninating oils for the State oil inspec- 

 tion, special State appropriations being made for this service. 



The botanist continued his observations on weed destruction by 

 means of various spraying solutions. The State enacted a pure-seed 

 law, and furnished funds for its execution and a well-equipped 

 laboratory for seed investigation. 



Cooperative work is carried on with this department in irrigation 

 at the Williston substation, with reference to the amounts of water 

 applied per acre, times of application, behavior of small grain, 

 alfalfa, sugar beets, and market products under irrigation in that 

 climate, and upon two of the types of soils which that farm repre- 

 sents. Dry land and irrigated farming on the same crop are here 

 comjDared. During this dry season the yields without irrigation 

 were only worth harvesting for forage. Other dry-land cooperative 

 trials were conducted at Edgeley and at Langdon. The work on 

 hardy alfalfa at the Dickinson substation was given considerable 

 attention. It has been possible to make alfalfa survive under the 

 severe winter conditions as well as under dry-land farming methods. 

 Experiments on alfalfa were also in progress at the Williston, Lang- 

 don. and Edgeley substations. Work at the new substation at Het- 

 tinger was carried forward during the year, and this station is now 

 ready to begin experimental work. 



The average yields secured on the 24 demonstration farms during 

 the adverse season of 1010 were much greater than the average yields 

 for the entire State. The station also did work in connection with a 

 breeding circuit in cooperation with the Bureau of Animal Industry 

 and with college-extension and farmers' institute work. 



