any chemical fertilizer or pesticide will kill some biology in the soil. I do not advise bridge products. So for me is all or nothing. The best way to add organic matter is to follow an organic approach to lawn care, which means proper mowing when needed. keeping the grass tall at 3-3.5" tall during the season. Water when needed. Applying compost and compost tea. using organic fertilizer.

But first of all, you should be taking a soil sample before you apply anything. That is the only way to know what is needed in your soil. Without it you will be guessing what products to use. Chemical lawns are product driven. Everybody uses the same products. Broadleaf control, grub control, fertilizer, more weed control, etc... So, sample first. use organic products and you will be getting almost 2" of rich organic matter every season. in 3 years you can have enough good soil to grow grass. For the first few years you will have to be patient, build up the soil, and be patient with the many weeds you will see on your lawn. It is definitely worth the time and effort.

This is a 3 year old lawn. Applied lots of compost, and no fertilizer whatsoever. Now it just grows. pH 7 and it is self sustainable. Year one looked bad, and year 2 looked awful. Now everything is balanced, with lots of earthworms, and microbes that keep the soil healthy and almost weed free.

Note where the property line ends, and neighbor doesn't do anything.

An organic lawn starts with a good healthy soil and putting synthetics on that soil will not help get that. A good reliable soil test for soil pH and major nutrients is a start. These simple soil tests may also be of some help.

1) Soil test for organic
material. From that soil sample put enough of the rest to make a 4 inch level in
a clear 1 quart jar, with a tight fitting lid. Fill that jar with water and
replace the lid, tightly. Shake the jar vigorously and then let it stand for 24
hours. Your soil will settle out according to soil particle size and weight.
For example, a good loam will have about 1-3/4 inch (about 45%) of sand on the
bottom. about 1 inch (about 25%) of silt next, about 1 inch (25%) of clay above
that, and about 1/4 inch (about 5%) of organic matter on the top.

2) Drainage. Dig a hole
1 foot square and 1 foot deep and fill that with water. After that water drains
away refill the hole with more water and time how long it takes that to drain
away. Anything less than 2 hours and your soil drains’ too quickly and needs
more organic matter to slow that drainage down. Anything over 6 hours and the
soil drains too slowly and needs lots of organic matter to speed it up.

3) Tilth. Take a handful
of your slightly damp soil and squeeze it tightly. When the pressure is
released the soil should hold together in that clump, but when poked with a
finger that clump should fall apart.

4) Smell. What does your
soil smell like? A pleasant, rich earthy odor? Putrid, offensive, repugnant
odor? The more organic matter in your soil the more active the soil bacteria
will be and the nicer your soil will smell, to a point. Too much organic matter
can be bad as well.

5) Life. How many
earthworms per shovel full were there? 5 or more indicates a pretty healthy soil. Fewer than 5,
according to the Natural Resources Conservation Service, indicates a soil that
is not healthy.

kimmq is kimmsr

The answer depends on who you ask. Ask the question in a forum of devotees of a particular type, what kind of answer do you think you are going to get?

I've said this before, and i'll probably say it until I die...turf is easy. Enough water, some fertilizer, and the rest is just keeping on top of stuff, addressing issues as they arise before they become larger. How you do this, as far as i'm concerned, is up to you.

Needless to say, i'm not too concerned that what you do or how you do it conforms to a certain methodology. If it matters to you, dance the steps you need to.

I grew up on a farm that most people outside of the world where I grew up would call a factory farm. We sprayed chemicals when we deemed it necessary, and applied fertilizer when crops were performing poorly. What I can tell you is this:

Life finds a way, and is much more dynamic than what you'd think, based on what reading online would have you think.

I'd do the best you can. If you can't find a way to validate the expenditure, don't let someone else intimidate into doing what they think you should do...unless they are willing to share the cost with you. What I would urge you to do is observe and learn and learn and observe. Along the way, you'll arrive at your own conclusions, based on experience and knowledge. And then, you'll be able to answer the questions posed by someone else.