TY  - BOOK
AU  - CLAY, David E. ed.
AU  - SHANAHAN, John F. ed.
TI  - Gis Applications In Agriculture
SN  - 9781420092707
U1  - 630.208 
PY  - 2011///
CY  - Boca Raton
PB  - CRC Press
KW  - Geographic information systems. 2. Agricultural mapping. 3.Agriculture -- Data processing
N1  - Vol. 2: Nutrient Managment For Energy Effciency
ER  -