How well SRI works is still debated between believers and unbelievers of the plan. Critics of SRI say that claims of high yield in SRI are due to unscientific reporting. They object that there is a lack of details on the methodology used in trials and a lack of printed reports in the peer-reviewed literature (related to schools and universities). Some unbelievers have suggested that SRI success is unique to soil conditions in Madagascar. While unbelievers still claim this, there are over 700 articles and printed reports about SRI that are published in international scientific journals as of January 2016.