Impact of Addition of FGDB as a Soil Amendment on Physical and Chemical Properties of an Alkali Soil and Crop Yield of Maize in Northern China Coastal Plain

Table 4

Some mineralogical and physical properties of FGDB used to amend alkaline soil.

Mineral component	Water content (%)	CaSO4·2H2O%	Particle size %			Texture	Insoluble residue (%)
			<30 μm	30–60 μm	>60 μm
Gypsum and quarts	10	99	3.2	0.14	96.66	Silt sized	1

Average of triplicate measurements.