Providing food for predators: Earthworms, like all creatures, are part of food webs. Birds are well known predators, but native earthworms are also food for endangered and endemic land snails. Earthworm benefits to humans. New Zealand scientists have had a unique opportunity as far as earthworm research is concerned.
For details, see more on Roth IRA conversions). For 2015, you can contribute the maximum $5,500 to a Roth IRA ($6,500 if you are age 50 or older by the end of the year) if you are single or the single head of a household and your modified adjusted gross income (MAGI) is less than $164,000.ne caveat: If you earn less than the maximum contribution limit, you can contribute only as much as you earned. So if, (for example, you earned just $3,000, you could contribute only $3,000 to a Roth IRA for the year.
Current as of November 14, 2013. Main rules for annual contributions to a Roth IRA. Most people who work for a living (or have a spouse who works for a living) can contribute to a Roth IRA. Thereâs still an income limit on regular contributions, though, even though the income limit on conversions has been repealed. You can make a regular contribution even if you made a conversion in the same year. 2  Contribution to conversion Roth IRA. 3  Although there was initially some confusion on this point, itâs been clear for a long time that you can make regular contributions to a conversion Roth IRA.