death_place death_date birth_place fields workplaces birth_date article_title name alma_mater
washington , d.c. 2 february 1958 little rock , iowa botany american society of agronomy usda june 12 , 1873 carleton roy ball
 carleton roy ball iowa state college
carleton roy ball

carleton roy ball -lrb- 1873 -- 1958 -rrb- was an american botanist .
