The amount of Al-substitution in goethite in P horizon clays of percogenic paddy soil was higher than that of other diagnostichorizon clays of paddy soil.
渗育型水稻土P层的赤铁矿含量比相应的母土低，其针铁矿铝替代量较其它水型的水稻土高。
2
Through the complete analyzing of representative pedons, there are 5 diagnostic horizons, such as Ochric epipedons, Argic horizon, Claypan, Hydragric epipedon, Hydragric horizon;
It especially studies and deduces the diagnostic formulates and method when one of four horizon channels of the main and backup platform system exists slow shift.