AZOTOBACTER IN HAWAIIAN SOILS

The Vanadium Content of Hawaiian Island Soils

Occurrence of Azotobacter Spp. in Some Polish Soils

In the year 2000 the occurrence of Azotobacter spp. in 31 Polish soils was examined and results of this study were compared with those published by Ziemięcka for 28 soils analysed in 1917-18. Almost 52% of the soils tested in 2000 were colonised by Azotobacter spp. indicating that intensification of agricultural practices that took place during the past century has not significantly changed (50...

Multiple sources of lead in soils from a Hawaiian chronosequence

We report lead isotopic ratios and concentrations from a basaltic soil chronosequence in Hawaii. Substrate ages at the sites range from 300 years to 4.1 million years. All soils show a net addition of Pb above the contributions made by basaltic weathering, indicating that atmospheric deposition of natural or pollutant sources is important across the sequence. Isotopic ratios from the chronoseqe...

The Origin and Composition of Pyrolusite Concretions in Hawaiian Soils!

THE SOILS of the drier regions of the Hawaiian Islands have a very high manganese content. Kelley ( 1909) has reported that certain darkcolored soils which are closely associated with the red soils have an Mna04 content ranging from 2.4 to .9.7 per cent. He has indicated the relationship between the poor growth of pineapples and the high manganese content of these soils (1909, 1910 ) : In a lat...

Pesticide sorption and leaching potential on three Hawaiian soils.

On the Hawaiian Islands, groundwater is the principal source of potable water and contamination of this key resource by pesticides is of great concern. To evaluate the leaching potential of four weak acid herbicides [aminocyclopyrachlor, picloram, metsulfuron-methyl, biologically active diketonitrile degradate of isoxaflutole (DKN)] and two neutral non-ionizable herbicides [oxyfluorfen, alachlo...