TY  - BOOK
AU  - ENGELSTAD, Orvis P
TI  - Nutrient mobility in soils: Accumulation and losses
T2  - SSSA special publication series; 4
U1  - 631.41:631.811 
PY  - 1970///
CY  - USA
PB  - Soil Sc Soc of America
KW  - Soil nutrient mobility
ER  -