Table 1 The location, soil great group and initial time of the long-term field experiments in China used in this study.

From: Soil ionomic and enzymatic responses and correlations to fertilizations amended with and without organic fertilizer in long-term experiments

Sampling site abbreviation

Coordinates

Location

Soil great group

Experiment initiation year

JL

124.8°E,

Gongzhulin, Jilin Province

Black Soils

1990

43.5°N

SD

120.7°E

Laiyang, Shandong Province

Fluvo-aquic Soils

1978

36.9°N

AH

116.75°E

Suixi, Anhui Province

Lime Concretion Black Soils

1981

33.62°N

HN

111.87°E

Qiyang, Hunan Province

Red Soils

1990

26.75°N

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