TY  - BOOK
AU  - Bartholomew, W.V.
TI  - Soil nitrogen; supply processes and crop requirements
T2  - U.S.Department of Commerce, NTIS; Technical Bulletin; no.6
U1  - 631.416.1:633(07) L2 
PY  - 1972///
CY  - Spring field
PB  - NTIS, U.S. Dept. of Commerce
KW  - W.V. Bartholomew
KW  - Soil-nitrogen content,Cereal fertilizers and manures,Nitrogen fertilizers,Growth(Plants)
ER  -