I am a market gardener and I want a tool to sow seeds

If you have a market garden where you sell vegetables and are finding that you are spending too much money on seeds this project might be for you.  Some people may still broadcast or sprinkle seeds by hand, however with a precision seeder that counts, not only can you sow seeds equally spaced to keep from wasting seeds, you can even get to the point where you add on an electronic seed counter that will detect seeds as they fall into the ground.  How many times have you ran a seeder only to find out that nothing came up, well, was it bad seed, or were the seeds stuck in the mechanisms?  Imagine you pushing a seeder, listening to beeps every time a seed falls into the ground; if the beeping stops, there's a problem.  Once you are down at the end of the row or bed, you look down at your display and see how many seeds fell into place, you jot it down in your notebook and with a push of a button you can reset the display and start counting the number of seeds falling into the next row or bed.  Although the seeder does work for most vegetable seeds as small as lettuces and cabbages, to as large as medium sized corn, beans, and squash, the counter only senses larger seeds, but I'm currently in the process of trying out a few different sensors a little more sensitive to possibly count the lettuce or cabbage seeds.  The counter is arduino based and code will soon be provided as well.

What functionality solves this problem?: