USA

Taro at 4 months with biochar compost

Corn at harvest with compost

Corn at harvest with neither compost nor biochar

corn at 3 wks with biochar and compost

Corn at 3 wks with neither biochar nor compost

Corn at 6 wks with biochar and compost

Corn at 6 wks with compost

beans at 5 weeks without biochar

Corn at harvest with biochar and compost

sweet peas without biochar 2

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