I want to use front accounting for agriculture farming accounting, Is it possible? It is produced by consuming different amounts of water and seeds and pesticides in different areas. How will the product of all these expenses be recorded in the FA?
There's probably more than one way; you've already considered using the manufacturing module; so my thoughts are:-
Input your purchases of seeds, fertilizer, water, etc as expenses, you will then have stock in your FA inventory.
Vigorously record separately how much seed, fertilizer, water, etc are used on each plot.
Once the crop has been harvested you will know the yields per/acre/hectare/plot: You now have all the necessary information to create a works order for each plot.
In the inventory you will now have stock of the products and by-products you have grown to sell.
Try it on your training company whilst your waiting for the seeds to grow.
The FrontAccounting Wiki(Manual, examples, tips, setup info, links to accounting sites, etc) https://frontaccounting.com/fawiki/