The dualistic culture reality is a primary characteristic of the agribusiness extension
in the context of partnership between nucleus estate and smallhorder. The reality implies to
the need of communication strategy in order to achieve the effectivity of the extension
effort. Dualistic culture in estate system in Indonesia was started by dualistic economy,
that is at one side big estate has orientation on modern capitalism and smallholder, on the
other hand, has orientation on traditional pre-capitalism.The communication strategy
covers two strategies. They are convergent strategy and divergent strategy. These strategies
are used by agents of change from nucleus estate in their extension activities. This paper is
based on qualitative study and takes partnership case at PT Pagilaran. PT Pagilaran is a
company that moves on tea agribusiness and managed by Gadjah Mada University through
Yayasan Pembina Fakultas Pertanian