title: Nitrification in soil as a function of time.
mesh_terms: D000641:Ammonia / Q000378:metabolism; D001419:Bacteria / Q000254:growth & development / Q000378:metabolism; D001431:Bacteriological Techniques; D003124:Colorimetry; D003604:Czechoslovakia; D007630:Kenya; D008433:Mathematics; D009566:Nitrates / Q000096:biosynthesis*; D012988:Soil Microbiology; D013696:Temperature; D013997:Time Factors; D014867:Water; D015022:Yugoslavia; D015024:Zambia
chemical_list: D009566:Nitrates; D014867:Water; D000641:Ammonia