 | 1896 - 818 páginas
...to their vitality and purity, classification of weeds and methods for their eradication. Forty-three stations work to a greater or less extent in horticulture,...varieties of vegetables and large and small fruits. Several stations have begun operations in forestry. Thirty-one stations investigate injurious insects... | |
 | United States. Department of Agriculture - 1889 - 668 páginas
...to their vitality and purity, classification of weeds and methods for their eradication. Thirty-five stations work to a greater or less extent in horticulture,...making studies in varietal improvement and synonymy. Nine stations have begun operations in forestry. Twenty-five stations investigate injurious insects... | |
 | WASHINGTON GOVERNMENT - 1889 - 654 páginas
...to their vitality and purity, classification of weeds and methods for their eradication. Thirty-five stations work to a greater or less extent in horticulture,...large and small fruits, and making studies in varietal imErovemeut and synonymy. Nine stations have begun operations in jrestry. Twenty-five stations investigate... | |
 | United States. Office of Experiment Stations - 1889 - 418 páginas
...their vitality and purity, and classification of weeds and methods for their eradication. Thirty-five work to a greater or less extent in horticulture, testing varieties of vegetables and fruits and making studies in varietal improvement and synonymy. Nine have begun operations in forestry.... | |
 | 1891 - 902 páginas
...their vitality and purity, and classification of weeds, and methods for their eradication. Thirty-five work to a greater or less extent in horticulture, testing varieties of vegetables and fruits, and making studies in varietal improvement and synonymy. Nine have begun operations in forestry.... | |
 | United States. Department of Agriculture - 1895 - 632 páginas
...to their vitality and purity, classification of weeds and methods for their eradication. Forty-three stations work to a greater or less extent in horticulture,...and synonymy. Several stations have begun operations iu forestry. Thirty-one stations investigate injurious insects with a view to their restriction or... | |
 | 1895 - 634 páginas
...to their vitality and purity, classification of weeds and methods for their eradication. Forty-three stations work to a greater or less extent in horticulture,...vegetables and large and small fruits, and making stndies in varietal improvement' and synonymy. Several stations have begun operations in forestry.... | |
 | 1900 - 1020 páginas
...their vitality and purity, classification of weeds, and methods for their eradication. Fifty-three stations work to a greater or less extent in horticulture,...fruits, and making studies in varietal improvement and synonomy. Several stations have undertaken operations in forestry. Thirty-six stations investigate... | |
 | Alfred Charles True, Vinton Albert Clark - 1900 - 960 páginas
...their vitality and purity, classification of weeds, and methods for their eradication. Fifty-three stations work to a greater or less extent in horticulture,...fruits, and making studies in varietal improvement and sy nonymy. Several stations have undertaken operations in forestry. Thirty -six stations investigate... | |
 | Daniel Coit Gilman, Harry Thurston Peck, Frank Moore Colby - 1902 - 1010 páginas
...their vitality and purity, classification of weeds, and methods for their eradication. Fifty-three stations work to a greater or less extent in horticulture,...fruits, and making studies in varietal improvement and synonomy. Several stations have undertaken operations in forestry. Thirty-six stations investigate... | |
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Fifty-three stations work to a greater or less extent in horticulture, testing varieties of vegetables and large and small fruits, and making studies in varietal improvement and synonymy. 
