TY - BOOK ED - United States . Depertment of Agriculture TI - Diagnosis and improvement of saline and alkali soils U1 - 631.416 21st ed. PY - 1953/// CY - United States : PB - Department of Agriculture, United States KW - Soils KW - Alkale soils KW - Soil analysis KW - Soil salinization KW - USA ER -