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On farm studies in 1994 with a composted, poultry litter (PPL) product, Organigro (Organigro Inc., Watts, OK), were conducted with fall spinach and collards in eastern Arkansas. In a small plot study with `Cascade' spinach grown on Dubbs fine sandy loam soil (pH 6.5 to 6.8) in a large commercial field receiving fertilizer inputs of 102-0-70 NPK + 29.5 S + 0.5 B, additions of as little as 280 kg PPL ha -1  significantly increased yield. In collard studies, effects of applications of PPL, NPK and a transplant water applied fertilizer solution were compared in a trial with transplanted `Blue Max grown in a silt loam soil (pH 5.8 to 6.2) that had been damaged from precision leveling. PPL applied at 560 kg ha resulted in significantly higher yields than plots receiving NPK (applied as 516 kg 13-13-13 ha -1 ) alone. Applications of a fertilizer solution containing secondary and micronutrients (Golden Harvest Plus, Smeller Chemical. Houston, TX) in transplant water (50 ml/plant solution containing .95 1 GH+/378 1 H 2 O) resulted in comparable yields as those treatments with PPL. These results indicate that shallow rooted vegetable crops such as spinach and collards grown in damaged soils or light textured soils with low organic matter can he improved with additions of poultry litter. The PPL product used in these studies is produced with a guaranteed analysis of 4-4-4 NPK, and because it has been composted, problems with weed seeds and pathogenic organisms have been eliminated The pelletized form of the product also, facilitates field application. These properties make this type product ideal for use in vegetable production systems, particularly where problems with secondary or micronutrients may he likely.

632 PB 490 FIELD TRIALS WITH COMPOSTED, PELLETIZED POULTRY LITTER APPLICATIONS IN SPINACH AND COLLARDS