IDBU - Comparison

Nitrogen Source Comparison

Product	Total N*	WSN+	CWIN**	HWIN	Release Mechanism	Soil Moisture	Temp	Microbial Activity	Particle Size	Comments
IBDU	31	10%	90%	None	Hydrolysis	Major	Minor	N/A	Major	Premier nitrogen source for fine turf. Excels in cool weather, evenrelease in warm weather.
UF	38-41	27.6%	47.3%	25%	Microbial Activity	Yes	Major	Major	Minor	Best at 65-85F. May release too quickly in hot weather.
MU	39-40	65%	20%	15%	Microbial Activity	Yes	Major	Major	Minor	May cause growth surge in heat. Feeding time usually < 60 days.
MDU/DMTU	40-42	90%	7%	3%	Microbial Activity	Yes	Major	Major	Minor	May cause growth surge in heat. Feeding time usually < 60 days.
CDU	32	15%	85%	None	Hydrolysis/Microbial Activity	Yes	Major	Major	Major	Little US testing. Not widely available.
SCU	28-39	All	Varies By Coating	N/A	Pores and Cracks in Coating/Microbial Activity	Yes	Major	Yes	Somewhat	Known to cause spotting. Susceptible to 'lock off'.
Poly-S	40	All	Varies By Comp.	N/A	Diffusion/Cracks in coating	Yes	Major	Some	Somewhat	Release pattern of surge and lag.
Polyon	39-44	All	Varies By Coating	N/A	Diffusion and Osmosis	Minor	Major	N/A	Somewhat	Coating thickness determines release rate.