Are you building an orchard, or will these trees be randomly located on your 10 acres?
Around here there are thousands of acres of irrigated orchard (almond, English walnut, pistachio, olives, mandarin oranges, plums for prunes). We have compacted soil (hardpan) so the first step is to use a ripper (aka subsoiler) to break up the hardpan so the roots can reach groundwater. My neighbor put in 8 acres of English walnut orchard about 3 years ago. He had to rip down to about 36 inch depth. He works for one of the large walnut processors in the area so he borrowed a D9 Cat to do the ripping.
Do you plan to irrigate these trees? If you're putting time and money into planting your trees, you need to make sure that they will have enough moisture to survive year round. Around here the orchards have to be watered year round--of course, more in the summer to get the trees through the triple digit temperatures in the Jun-Sep period.
To keep the orchard tidy and disease free, flail mowers are used to keep the weeds cut down to an inch or so height.
What are your plans for the nuts? Harvest? Then you need harvesting equipment. Walnuts, almonds and plums around here are harvested with tree shakers and accumulators/conveyers that catch the product and move it to the shipping crates to get stuff to the processors.
If you plan to just leave the nuts fall to the ground, you need to clean up to prevent disease. I have about 20 old, mature almond trees on my place (the remains of a 10-acre orchard that was planted 60 years ago). The trees are way to tall to harvest economically. So the crows and blackbirds do the harvesting for me in Aug and Sept. The birds strip the trees bare--not a nut remaining. They leave the husks and shells littering the ground as my part of the deal. Every year or two I run the rototiller lightly over the orchard to incorporate this litter into the soil.
Good luck.