2Indian Institute of Horticultural Research, 255-Upper Palace Orchards, Bangalore-6.
Indian Agricultural Research Institute, New Delhi, 110012
Present Address: 1Division of Fruit Crops, Directorate General of Horticulture, Zaafaraniya Experiment Station, Baghdad, Iraq.
*A part of Ph. D. thesis submitted by the first author to the post-graduate School, Indian Agricultural Research Institute, New Delhi in 1966.
Investigations connected with changes in ash and mineral constituents in the pulp and peel of Columbia and Hill lemons indicated that seasonal trends in the two portions were quite similar, but the concentrations varied considerably. On percentage of dry weight basis concentration of total ash was low in ripe and over ripe fruits over immature ones. The nitrogen, phosphorus, potassium and magnesium in the pulp and peel showed declining trend until maturity followed by a slight increase during the post maturity period. The calcium first reached to a maximum and then declined during the remaining period. On average basis, concentration of phosphorus and potassium was higher in the pulp and of calcium in the peel, while differences in nitrogen and magnesium in the two components were not marked.
