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Table 4 Potential effect modifiers

From: Biochar improves the nutrient cycle in sandy-textured soils and increases crop yield: a systematic review

Existing modifiers

New modifiers

Experimental country

Soil pH

Experimental design (i.e., greenhouse, lab, field)

Biochar pH

Experimental condition

Biochar application with manure

Climate type

Biochar with compost

Duration of experiment

 

Feedstock for biochar

 

Biochar carbon content

 

Pyrolysis temperature

 

Biochar application rate

 

Type of soil

Â