TY  - JA
AU  - Suyamto
AU  - Sumarno
TI  - Direct and residual effect of potasium fertilizer on rice - maize cripping rotation on Vertisols
PY  - 1993///
KW  - Cropping systems
KW  - AGROVOC
KW  - Fertilizer application
KW  - Indonesia
KW  - Maize
KW  - Nutrient availability
KW  - Potassium
KW  - Rice
KW  - Vertisols
T2  - Indonesian Journal of Crop Science
ER  -