TY  - BK
AU  - Gelderman,R.
AU  - Drymalski,S.
TI  - The use of soil tests to predict fertilizer nitrogen needs of corn
T2  - TB - Agricultural Experiment Station, South Dakota State University (USA).
SN  - 0191-1716
U1  - 94-084603 
PY  - 1992///
KW  - America
KW  - Crop husbandry
KW  - Elements
KW  - Fertilizing
KW  - Gramineae
KW  - Nonmetals
KW  - North America
KW  - North central states usa
KW  - Northern plains states usa
KW  - Periodicity
KW  - Soil chemistry and physics
KW  - Time
KW  - USA
KW  - Zea
KW  - Yields
KW  - AGROVOC
N1  - In the series analytic: Soil science research in the Plant Science Department : 1991 Annual Report. Soil PR 91-17
ER  -