Any conclusive evidence regarding tomato plants and septic lines?

[harleysilo]

So my tomato row (60') runs slightly downhill in my back yard, directly W to E.

The far west uphill side always dies out and produces less than the downhill east side. The reason??? The very end or our two septic field lines end where the row is. In the dead of summer you can see two green lines in our yard directly over the field lines, ending at the tomato row.

So the other day, I halved my row, and then re-installed three new posts creating 2 30' rows about 7' apart. Now all my tomatoes will benefit from the special stuff lying below....

Any problem with this other than no watering/fertilizing by me this summer?

It's not as if sewage is just lying on the ground and splashing all over the place, they're at least 4' deep, well 4' down you hit gravel...lines somwhere under that.