Columbia subject headings:
Botanical chemistry--Periodicals.
Plant diseases--Periodicals.
Plant-soil relationships--Periodicals.
Plants--Nutrition--Periodicals.
Soil microbiology--Periodicals.
Harvard subject headings:
Botanical chemistry--Periodicals
Plant diseases--Periodicals
Plant-soil relationships--Periodicals.
Plants--Nutrition--Periodicals.
Soil microbiology--Periodicals.
Princeton subject headings:
Botanical chemistry--Periodicals.
Periodicals.
Plant diseases--Periodicals.
Plant-soil relationships--Periodicals.
Plants--Nutrition--Periodicals.
Soil microbiology--Periodicals.