Startup Idea: Plant Nurturing Software for Community Gardening

Startup idea to develop a software integrated with a device that can be inserted in the soil, enabling users to determine nutrient levels in the soil and provide advice on what to add to the soil to achieve desired plant results.

I'm working on a community garden project and it would be so helpful to be able to tell what the plants need via technology.

It would be great to have a device that you could stick in the soil near the plant to determine what the soil is missing and what there is excess of.

Basically the software provide specifics on what to add to the soil to achieve the desired results-sweeter tomatoes, sour tomatoes, fragrant tomatoes, etc.