Smithsonian Report, 1938. — Hoagland and Arnon 



PLATE 4 



Under favorable conditions tomato plants can grow to a great height and bear fruit over an extended period 

 of time. I his is equally possible in soil, sand, and water-culture media. The plants in the foreground 

 were grown in a bed of fertile soil. At the time of taking this photograph, several days before the termina- 

 tion of the experiment, most of the fruit was already harvested. 



