Waste bone biochar lifts maize yields 51% while cutting farm emissions
Hamed LMM, Emara EIR
Soil Health
If you've ever amended garden beds with charcoal or compost, this study shows that biochar made from an unlikely waste product can do more for soil life and plant productivity than almost any conventional amendment tested at field scale.
Scientists took waste bones from slaughterhouses, turned them into biochar (a porous charcoal-like material), and spread it on dry, sandy farmland to see what would happen to corn crops. Plants grown with the biochar were taller, heavier, and produced far more grain than untreated plots, while the soil itself became richer in carbon, nutrients, and beneficial microbes. As a bonus, the treated soil released less carbon dioxide and nitrous oxide into the atmosphere, making the whole farming system gentler on the climate.
Key Findings
Bone biochar at 10 t/ha increased maize grain yield by 51% and biomass by 28% compared to unamended soil.
Biochar reduced soil CO2 emissions by 24% and N2O emissions by 15%, lowering the farm's greenhouse gas footprint.
Soil organic carbon, available phosphorus, and microbial biomass carbon all improved, indicating a healthier, more biologically active soil.
chevron_right Technical Summary
Researchers found that applying bone-derived biochar to arid farmland boosted maize grain yield by 51% and biomass by 28%, while cutting greenhouse gas emissions and improving soil biology. The sweet spot was 10 tonnes per hectare, delivering the best balance of crop output, soil health, and carbon reduction.
Abstract Preview
Original paper
Field evaluation of bone biochar for improving maize yield, soil health, and carbon efficiency in arid soils.
the study aims to evaluate the effectiveness of bone-derived biochar, produced from slaughterhouse waste, as a multifunctional soil amendment within a climate-smart and circular agriculture framewo...
open_in_new Read full abstractAbstract copyright held by the original publisher.
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Maize, also known as corn in North American English, is a tall stout grass that produces cereal grain. The leafy stalk of the plant gives rise to male inflorescences or tassels which produce pollen, and female inflorescences called ears. The ears yield grain, known as kernels or seeds. In modern ...