Improving orchard soil

Hello,

I have a small orchard at our farm that has 21 trees and I am looking to improve the soil.  The farm is land locked with only an easement road so supplies are limited.  
I am thinking of acquiring some horse manure from my neighbor and putting it down first.  We have a couple of bales of 2-3 year old alfalfa hay that I am thinking of tearing down and using that to cover the manure with.  I would then like to establish clover in the main rows to minimize mowing and attract insects.  Once it warms up I will then plant some perennials in the mulch rows to attract beneficials.  

Is this enough to really improve the soil?  Is there anything I am missing?

I appreciate any feedback or advice.

Thanks.

Without knowing what sort of soil you have, whether it is abundant or lacking in particular minerals, I couldn't say whether the treatment you are planning will be enough.  
Do your orchard trees show signs of deficiencies, like diseases or lack of quality fruit?  

The Horse manure, if it is from your area, will probably provide the same sorts of minerals that are in your soil already...
If you are seeing signs of some deficiency that is a mineral not prevalent in your soil, the horse manure might not help with that.
Though of course, the manure will be providing nitrogen and other food-value for the trees.  

I live in a climate where the winter rains wash out a lot of the minerals from the soil, leaving it rather acidic generally.
However, I do very little feeding of my orchard - aside from chop and drop mulching.  
I get a lot of fruit, though I'll bet I could maximize production with getting them all of the trace minerals they crave.
I have spread minor amounts of Azomite mineral dust a couple of times, but not as a regular practice.

I think your plan sounds good, but if you see signs of deficiencies - perhaps more amendments are in order.

I have been using ideas from Dr.Redhawk.  Clover, Turnip, Tillage Radish. I also add mustard since it grows so well here in the spring and fall.

Companion planting with non-grass species (chop/drop, herbal leys, berries and other perennial food crops) is a time-tested orchard management method and adds to the yields you get from the space. Depending on how the trees are laid out in terms of spacing, you can look at the techniques of syntropic agroforestry...there are some good threads on here discussing the topic.

And for simplicity, you can't go wrong with wood chip mulch. If you make or have access to biochar, that's another thing that will give long-term benefits. I like to top-dress around my trees with biochar and put a layer of mulch over that, then let the worms and fungi do all the work.

Link to Dr Redawk's soil series HERE.

Any organic matter that you can add as mulch will break down and improve the soil.

Collect bagged leaf from curbs in town in the fall.

Small twigs and tree limps from trimming tress and other plants.

Cosider growing mushrooms.