Our study evaluates a granular fertilizer in field and greenhouse tests with corn (Zea mays L.), wheat (Tritcum aestivum L. em. Thell.), and soybean [Glycine max (L.) Merrill].  Tests evaluated P source and rate effects on soil test P (Mehlich-3), and crop P uptake.  Grain yield was evaluated in field tests only.  The granular fertilizer was prepared in a prior project from animal waste ash supplemented with ammonium and phosphoric acid during granulation to produce a  4.6% N, 27.9% P₂O₅, 3.6% K₂O, and 1.3% S fertilizer (AWP).  Of the available P, 70% was water soluble in the AWP, compared with 78% in triple superphosphate (0-46-0, TSP).  Long-term field sites with P gradients at the Peanut Belt (Aquic Paleudults), Piedmont (Rhodic Kanhapludults), and Tidewater Research Stations (Typic Umbraquults), and a field with a low soil test P level at the Mountain Horticultural Crops Research and Extension Center (Typic Hapludults) were used.  A P-responsive soil from the Tidewater Research Station was used in the greenhouse study.  Fertilizer was broadcast prior to planting with N, K, and S as needed to equilibrate rates among treatments.  Grain yield responses to the P fertility gradient were observed in 8 of 12 crops and plant P uptake responses were observed in all 12 crops grown on long-term fertility gradient sites.  For only 1 of these 12 crops, yields were slightly higher with TSP than with AWP.  For 1 of the 2 greenhouse crops, biomass yields were also slightly higher with TSP.  Responses were subtle to nonexistent for corn and wheat at the Mountain Crops site, wheat at the Piedmont site, and for the soybean crop.   The AWP was generally effective for these annual crops, although it may occasionally be less available than similar amounts of P₂O₅ applied as TSP due to its reduced water solubility.