USA

Cucumbers at 4 wks. with biochar

Cucumbers at 4 wks without biochar

tomatoes at 5 wks. with biochar compost

tomatoes at 5 wks. without biochar

Taro at 4 months with biochar compost

Corn at harvest with compost

Corn at harvest with neither compost nor biochar

beans at 5 weeks without biochar

Corn at harvest with biochar and compost

sweet peas with biochar 2

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