I also do this.
I would rather plant in blocks like this X X X X x x x x x x x x x
X X X X
X X X X x x x x x x x x x
X X X X X the big X’s being plants that grow UP
x x x x and the smaller ones are root crops or low growing..
X X X X X
x x x x
because it makes more sense in saving space and less movement to weed the area, (Plant root crops amongst taller plants like tomatoes, becuase it deters weeds) HOWEVER, My husband rags me to no end
when I do this (because it is harder to rototill) so i plant in long rows. My garden is about 80 ft long and 35 feet wide. (roughly)
I mound the dirt up like that also, because of erosion. Not only from the rain but from the wind. Also you get ground compaction which causes uneven areas of dirt from walking on it and rototilling.
when you plant root crops, the root that is growing underneath the ground is going to grow down and outwards somewhat so mounding the dirt is better to keep the root from being exposed to air and insects.
He will probably have to mound up the dirt a few times during growing season because --well, depending on how much traffic your garden gets, the dirt is going to be displaced.
The reason that potatoes are planted in tall rows like that (with almost furrows in between) is because the root system of the potato plant is large and the potatoes themselves grow off the roots, it makes it easier to harvest them. Also, that’s why you get green spots on potatoes, that part of the potato has been
exposed to the sun.
Tell your hubby i said Good Luck!
& happy gardening