In Indonesia, rice is not only a staple food, but also a source of income providing jobs for most villagers. Since the beginning of seventies through the First Long Term Development Program and it was executed by PELITA (Pembangunan Lima Tahun = Five Years Development Plan), increasing rice production has been one of the priorities of the Indonesian agricultural development. It is not only to meet the rice growing demand, but also to improve farmer income and to support food security. Like other rice producing countries, planting high yielding varieties and adding more mineral fertilisers are widely implemented to elevate rice and land productivities. Indonesia has been amazingly recognised in successful in increasing rice production and in 1984 reached rice *Corresponding author email: sukristiyonubowo@yahoo.com Tel: +6281226277259 self-sufficiency. This achievement was mainly due to application of a system of high external inputs (Green Revolution technology) including high yielding rice varieties and agrochemicals (Sukristiyonubowo, 2007).