Phosphorus Availability In Turfgrass Root Zones After Applications of Organic and Synthetic Nitrogen Fertilizers

Organic fertilizers have increased in popularity due to the belief they are more environmentally sound than synthetic fertilizers. However, most organic fertilizers contain phosphorus in addition to nitrogen, so use may be affected in states that control phosphorus applications. Click here to read about a study completed at Washington State University that investigates how organic fertilizer sources affect soil test phosphorus and phosphorus saturation in a native soil and a sand-based root zone mixture under field conditions.

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