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  1. 21
    by Montecillo, Lupo A. 1934-
    Published 1969
    Thesis

    Effects of potassium on the growth, yield and on the nutrient cation relationship in rice grown on calcareous soils
  2. 22
    Thesis

    Some factors affecting the availability of zinc in rice soils
  3. 23
    Thesis

    Availability and transformation of phosphorus fertilizers in submerged and nonsubmerged soils
  4. 24
    by Ayyangar, R. Seshadri 1940-
    Published 1967
    Thesis

    Iron and manganese nutrition relationship in rice grown in the Philippines
  5. 25
    by Vangnai, Somsak 1939-
    Published 1966
    Thesis

    Microbial transformation of sulfur in soil
  6. 26
    by Krutkun, Tawin 1937-
    Published 1966
    Thesis

    Influence of internal drainage on the chemical and electrochemical changes of four flooded soils and on the growth of rice
  7. 27
    by Prabuddham, Paiboon 1939-
    Published 1966
    Thesis

    Influence of the duration of submergence of the soil prior to transplanting on the growth and yield of rice
  8. 28
    by Aspiras, Ruben Baldonado 1939-
    Published 1966
    Thesis

    Some factors affecting ammonification in flooded soils
  9. 29
    Thesis

    Nitrogen availability in five soils under different management systems and its effects on growth and yield of rice
  10. 30
    by Racho, Vicente Villapaz 1937-
    Published 1966
    Thesis

    Nitrogen transformation in flooded maahas clay with and without rice
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