A friend of mine who did MS from Montana State (a top 5 ag econ MS program) has a very similar profile as yours. He scored 164 in GRE quant and 170 in verbal. He also has the drive to work in the ag econ research field particularly in the Midwest. His GPA was slightly lower than yours though, at 3.70 (with a B+ in real analysis as an extra course with the math department).
This profile got him into Minnesota, UC Davis, North Carolina State and Iowa State, all four departments he applied to.
He had a really amazing master's thesis and top recommendations from the faculty recognized in their field. I'm sure you can pull off the recs part if you did great, and are from a strong land-grant applied econ MS program yourself.
So I'd say 163 can still take you to good ag econ PhD programs if your overall profile is great.
Not sure about Penn State and Syracuse econ programs though. I heard somewhere in this same board that the top 10 ag econ programs (which all four of the above are) are equivalent in terms of competency in admissions and overall rigor to the top 40 general econ programs. One of my other friends got into U Washington with a 165, and another one got into American U (DC) and U Mass Amherst with 163. So it looks fine!