TY  - SER
ED  - Ponnamperuma.
TI  - Specific soil chemical characteristics for rice production in Asia
T2  - A.I.D. research & development abstracts ; 
PY  - 1981///
CY  - Washington-US : 
PB  - United States Agency for International Development, 
N1  - Artículo dentro de: Agriculture-soil science; Sumarios de investigación
ER  -