952 PUBLIC LAWS-CH. 253 -JUNE 30, 1939 [53 STAT. BUREAU OF PLANT INDUSTRY SALARIES AND EXPENSES Investigation of For the investigation of fruits, fruit trees, grain, cotton, tobacco, vegetables, grasses, forage, drug, medicinal, poisonous, fiber, and other plants and plant industries, and of soils and soil-plant relationships, in cooperation with other branches of the Department, the State experiment stations, and practical farmers; for the erection of nec- Cost of bildings. essary farm buildings: Provided, That the cost of any building erected, except head houses connecting greenhouses, shall not exceed $2,500; and for the employment of persons and means in the city of Washington and elsewhere required for the investigations, experi- ments, and demonstrations herein authorized, as follows: Administrativ ex- General administrative expenses: For necessary expenses for gen- eral administrative purposes, including the salary of chief of bureau and other personal services in the District of Columbia, $202,442. Arlington, Va., ex- Arlington Farm: For continuing the necessary improvements to establish and maintain a general experiment farm and agricultural station on the Arlington estate, in the State of Virginia, in accordance 31 stat. .. with the provisions of the Act of Congress approved April 18, 1900 (31 Stat. 135, 136), $49,414. graildg land d Botany: For investigation, improvement, and utilization of wild provement, etc. plants and grazing lands, and for determining the distribution of weeds and means of their control, $76,635, of which $40,000 shall be Eradication of nox- expended for scientific investigation concerning control and eradica- tion of whitetop, bind weed, and other noxious weeds. diseeass cm t and Cereal crops and diseases: For the investigation and improvement diseases, investiga- tion, etc. of cereals, including corn, and methods of cereal production and for the study and control of cereal diseases, and for the investigation of the cultivation and breeding of flax for seed purposes, including a study of flax diseases, and for the investigation and improvement of broomcorn and methods of broomcorn production, $551,121. duction and diseases. Cotton and other fiber crops and diseases: For investigation of the production of cotton and other fiber crops, including the improvement by cultural methods, breeding, and selection, fiber yield and quality, Sea Islandcotton. and the control of diseases, $424,385, of which sum not less than $14,700 shall be used for experimenting in Sea Island cotton, includ- ing its hybridization with other varieties. Drug, etc., plants. Drug and related plants: For the investigation, testing, and improve- ment of plants yielding drugs, spices, poisons, oils, and related prod- ucts and byproducts, $47,139. ture-lan agricul- Dry-land agriculture: For the investigation and improvement of methods of crop production under subhumid, semiarid, or dry-land New field stations conditions, $226,828: Provided, That no part of this appropriation forbidden. shall be used for the establishment of any new field station. Exhermental grneen- Experimental greenhouse maintenance: For maintenance and opera- tion of experimental greenhouses and adjacent experimental grounds and plots, $77,372. Foae crops and Forage crops and diseases: For the investigation and improvement of forage crops, including grasses, alfalfas, clovers, soybeans, les- pedezas, vetches, cowpeas, field peas, and miscellaneous legumes; for the investigation of green-manure crops and cover crops; for investi- gations looking to the improvement of pastures; and for the investi- gation of forage-crop diseases and methods of control, $313,450. Forest pathology. Forest pathology: For the investigation of diseases of forest and ornamental trees and shrubs, including a study of the nature and habits of the parasitic fungi causing the chestnut-tree bark disease, the white-pine blister rust, and other epidemic tree diseases, for the purpose of discovering new methods of control and applying methods of eradication or control already discovered, and including $132,569
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