Soil Test Phosphorus Recovery from Livestock Manures Compared with Inorganic Fertilizer in Soil Incubations

Table 1

Selected properties of Medium-Soil Test P (Med-STP) and Low-Soil Test P (Low-STP) soils used in the study. Lab analysis was performed on the bulked, dried, and sieved soil.

Soil	Soil Taxonomy		Soil Texture	pH	% SOM	Soil Test values (mgkg^−1)^(a)
	Canadian	U.S.D.A.				P (rating)	Ca (rating)	Fe
Med	Gleyed Humic	Humaquent	coarse	6.7	2.7	38	3828	336
STP	Regosol		loamy			(medium)	(medium +)
Low	Gleyed Humic	Humaquent	coarse	4.9	3.8	23 ( low −)	2014 ( low +)	430
STP	Regosol		loamy

(a)Soil test values by Mehlich-3 extraction. Ratings shown in bracket indicate the magnitude of these values.