Thing is .... I wouldn't presume to know what your "backyard soil structure" is like and like yourself would love to know more. Here I can tell you it is sand; high mineral content and high iron content but low nutrient...basically add cow poo and stand back! 
Here is my current home:- http://www.geo.utexas.edu/courses/381R/WAgeomap.jpg
![[Image: WAgeomap.jpg]](https://images.weserv.nl/?url=www.geo.utexas.edu%2Fcourses%2F381R%2FWAgeomap.jpg)
As I intimated before we are lucky to have anything resembling "top soil" here to a depth of about 30cms (12 inches) Clay is virtually unheard of except in small isolated pockets as can be identified by the range of flora growing in the vicinity. See the white strip? That's where the tide has gone out and hasn't come back since millenia ago. Limestone sand isn't THAT bad but then again it isn't the type of "soil" that will feed multitudes (either with veggies or meat protein)
Here is my current home:- http://www.geo.utexas.edu/courses/381R/WAgeomap.jpg
As I intimated before we are lucky to have anything resembling "top soil" here to a depth of about 30cms (12 inches) Clay is virtually unheard of except in small isolated pockets as can be identified by the range of flora growing in the vicinity. See the white strip? That's where the tide has gone out and hasn't come back since millenia ago. Limestone sand isn't THAT bad but then again it isn't the type of "soil" that will feed multitudes (either with veggies or meat protein)
"The Universe is run by the complex interweaving of three elements: energy, matter, and enlightened self-interest." G'Kar-B5
