TY  - GEN
AU  - Weir, Wilbert Walter
TI  - Soil science : its principles and practice : including basic processes for managing soils and improving their fertility
T2  - Lippincott's agricultural science series
U1  - 631.4 WEI 
CY  - Chicago, J.B.Lippincott company
KW  - Soil science/ soil fertility - crop production/ fertilizers
ER  -