TY  - REP
AU  - Ping,H.
AU  - Bao,L.
AU  - Feijie,L.|Yuexian,X.|Yansheng,Y.|Naiquan,X.|Fangquan,M.
AU  - Jiyun,J.
TI  - Effect of nitrogen appication rates on leaf senescence and its mechanism in spring maize (Zea mays L.)
SN  - 7-80119-788-7
PY  - 1999///
CY  - Beijing (China)
PB  - China Agricultural Scientech Press
KW  - Analysis
KW  - Application methods
KW  - Fertility
KW  - Field experimentation
KW  - Maize
KW  - AGROVOC
KW  - Mechanization
KW  - Nitrogen content
KW  - Zea mays
ER  -