From: Calcium dynamics during the growth of Agaricus bisporus: implications for mushroom development and nutrition
Sample
Calcium content
S1: raw soil
7.02
S2: covering soil about 7Â days
2.61
S3: covering soil about 17Â days
2.38
C2: compost about 7Â days
4.55
C3: compost about 17Â days
4.12