SCANT

SCANT - adj -not abundant, meager; bearly enough

e.g.

Several respected studies have found that such payments have scant effect on student achievement.

http://www.nytimes.com/2012/01/01/education/big-pay-days-in-washington-dc-schools-merit-system.html?_r=1&hp

or

Scant evidence supports EPA's pyramided Bt corn refuge size of 5%.

http://www.nature.com/nbt/journal/v29/n7/full/nbt.1911.html