Phosphorus and poa revisited

Over the years, there have been a number of studies on Poa annua var. annua(poa) phosphorus requirements and competition with other turfgrass species. PACE Turf has published a report suggesting that low phosphorus may have reduced poa invasion at Talega Golf Club in Southern California. In a recent report, Guertal and McElroy conducted a greenhouse study carefully manipulating P fertilization levels in a low-phosphorus sand/peat greensmix sand, a moderate P loamy sand and a high P silty clay loam. The…