TY  - BOOK
TI  - Changing patterns in fertilizer use
U1  - 631.81 1968.2.14/15 (082.2) K8 
PY  - 1968///
CY  - Madison
PB  - SSSA
KW  - Nelson, L.B. et al,ed
KW  - Edited  L.B.Nelson et al
KW  - Soil science,Soil nutrition,Fertilizers
ER  -