Variazioni annuali dell'azoto, fosforo e potassio negli organi epigei delle drupacee in ambienti di coltura meridionali: nota 3.: mandorlo «Rachele»

Some observations were conducted on «Rachele» almond variety in
order to evaluate annual changes of N, P, K in various tree organs (flower-buds.
flowers and fruits: leaves and shoots).
55
Total amount of N. P. K in flower-buds, flowers and fruits increased
progressively during growth season.
As percent of dry matter, on the contrary, mineral content of these
organs in the some period decreased.
N and P leaf content (as percent af dry matter) decreased from springflush
to leaf fall: while an increasing of such elements was recorded in the
shoot during late summer, followed by a decreasing from early fall to
spring flush, flowering and fruit growth.
Leaf K changes were not clear, as well the relations betweeen changes
on mineral content of various organs and shoot and fruit growth.