Nutrient removal by Valencia orange fruit from citrus orchards
in California C. K. Labanauskas, University of California M. F.
Handy, University of California California Agriculture
26(12):3-4. DOI: 10.3733/ca.v026n12p3. Summary Not Available –
First paragraph follows: These data show that relatively small
amounts of nutrients applied to the soil are removed by citrus
fruit. The larger amounts of these nutrients tied up in plant
parts, particularly those in the leaf tissue, are eventually
returned to the soil. For the most part, phosphorus, calcium,
magnesium, zinc, manganese, copper, and iron will be adsorbed by
the soil particles and are not easily displaced from the soil.
Conversely, these elements may not always be readily available
to the plant. Availability of most of these cations to a plant
is highly dependent upon soil hydrogen ion concentration.
Nitrogen compounds, being water soluble, move readily in the
soil and are quite easily leached out, usually in the form of
nitrates, although in some instan