calciumcarbonclimatescoldcompostingcoppercropsdirtessentialfallfertilizefertilizersfixfoliarfreefuturegardengrowhouseplantshydrogenleafliquimatterneednutrientonionspeatperoxideplantplantsplasticreallyrootssafescienceseedseedlingsseedssemisoilstartstartingtomatotomatoesuseusingwaterwillwork