Optimal leaf nutrient levels based on summer
analysis.
P
K
Ca
Mg
0.16-0.26
1.1-1.6
1.2-2
0.18-0.36
Fe
Mn
Cu
Zn
40-100
40-100
5-12
20-50
Nitrogen mineralization (N-min) values and
appropriate nitrogen fertilization levels.
26.7-44.6
>44.6
30-50
>50
0-26.7
0
0-30
0
Number of foliar CA-treatments per season in South Tyrol.
Jonagold, Winesap
in orchard soils.
2
3
4
Fertigation program