Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Anatomical properties of stem under each combined treatment of water and nitrogen. a adequate nitrogen and drought; b adequate nitrogen and well-watered; c low nitrogen and drought; d low nitrogen and well-watered. Epi, epidermis; cor, cortex; ph, pholem; xyl, xylem; Bar = 200 μm
