I do not claim to have a PHD's in agronomy. I do know that GD's advice has pretty much worked for me. Before taking his and some others advice I struggled with centipede. My take on university studies is not that they are wrong or right but sometimes they are done on a limited basis and not a LONG term deal. And for instance, our university is in the northern part of the state where centipede does not grow.
Book knowledge is great but sometimes there is that ability to "see & feel" small details that others do not. I seems to me GD has this ability. That he shares it so freely with us is a blessing.