Noun
a chemical substance used to improve the structure of the soil and increase its porosity
Source: WordNetgypsum can be used as a soil conditioner Source: Internet
It has been used as a soil conditioner and acid soil neutralizing agent. Source: Internet
Containing water-soluble nutrients, vermicompost is a nutrient-rich organic fertilizer and soil conditioner in a form that is relatively easy for plants to absorb. Source: Internet
Maerl is commonly used as a soil conditioner. Source: Internet
Mica may also be used as a soil conditioner, especially in potting soil mixes and in gardening plots. Source: Internet
Types used in agriculture Marl was extensively mined in Central New Jersey as a soil conditioner in the 1800s. Source: Internet