Mf alkalinity of filtrate

例句：

1. 1. The soil is rich in minerals and has a high alkalinity.
   土壤富含矿物质，碱性很高。
2. 2. The pH of the solution indicates its alkalinity.
   溶液的pH值表明其碱性。
3. 3. The plant needs to be grown in a soil with a high alkalinity.
   这种植物需要种植在碱性土壤中。