-
471
Microbiological transformations of nitrogen in flooded maahas clay [microform]
出版事項 1977Visual Material -
472
-
473
Distribution of the forms of nitrogen in some Philippine soils [microform]
出版事項 1977Visual Material -
474
-
475
-
476
Sulfur availability to rice plants and its transfoemation in rice soil and rhizosphere [microform]
出版事項 1977Visual Material -
477
-
478
-
479
The phosphate supply pattern of some Philippine soils with high and low phosphorus contents [microform].
出版事項 1977Visual Material -
480