Yeah the soil sample is the most simplest and important of a successful food plot. Take a shovel and a bucket out there, collect soil a few inches down from about 5 spots in that size plot, mix it together, and pull out a enough to fill a quart zip loc bag. Take to the soil and water conservation office in your area and they will test it. Around here it's less than 5 bucks for the basics, tells me the ph and p, and k. In you boat I would plant a fall hunting plot. So there is plenty of time to work on this know and be ready to plant in Aug, Sep range.