[CentOS] CentOS 6: environment variables and cronjobs ...

Hello,

in

/etc/cron.d/test

I've this:

50 15 * * * root ( date ; echo "---" ; env ; echo "---" ; set )
>>/tmp/test.txt

and I thought I would be shown environment variables which are defined in

e.g.
/etc/profiles.d/proxy.sh or
/etc/profiles.d/proxy.csh

but this isn't like this ...

where do I have to define e.g.
export http_proxy="http://proxy.local:3128/"
in order to have it in cron jobs?

Thanks,
Walter