I've read previous posts on this topic but I am still unclear. I am not able to access the mathematics of GR but I would like to know what is it about the solution to the Einstein field equation that accounts for the additional precession that is observed in Mercury's orbit that Newton's gravitation could not predict?
I am aware the the majority of the precession is caused by the other planets' influence on Mercury but I am interested in the 'extra' bit that GR predicted. Besides GR being about warpage of space-time, is it simply that the solution to the EFE has an additional 2GM/c^2r^3 term in it and so as Mercury is close to the Sun this term has a noticeable effect on the precession? And therefore GR gives a slightly higher field strength for objects than Newtonian gravity?