Van Basten still needs to drop one more player before the deadline for submitting the 23 names of his squad.
Boschker had been called into the provisional squad for the first time. Landzaat made the squad for the 2006 World Cup finals but played only as a substitute. \
On Saturday, Van Basten said the last player to be dropped would be one of three defenders: Andre Ooijer, Khalid Boulahrouz or Mario Melchiot.
Melchiot missed training this week because of injury and will have to show on Monday and Tuesday that he has recovered sufficiently.
“We want to see how Melchiot is doing. Boulahrouz made a good impression and Ooijer is fit,” Van Basten told reporters after Saturday’s 3-0 win against Ukraine in a warm-up match for the June 7-29 European championship.
Today, the squad will gather in Hoenderloo to prepare for friendly matches against Denmark on Thursday and Wales next Sunday.
Holland, the 1988 European champions, have been drawn alongside Italy, France and Romania in Euro 2008 Group C.