Ash and charcoal mix triples soil fertility for highland barley
Guadie T, Gebeyehu B, Tufa M, Ahmed S
Soil Health
If your garden soil is acidic and stunting your plants, this shows how cheap, common materials like wood ash and charcoal can fix it without relying on expensive commercial lime alone.
Farmers in Ethiopia's highlands struggle with sour, aluminum-heavy soil that locks up nutrients and stunts barley. Scientists tested mixing biochar (charred plant matter), wood ash, and lime in different amounts and found the right combo pushed soil pH from a sour 5.2 up to a much healthier 6.8, while more than doubling available phosphorus. Interestingly, the mix that grew the most barley wasn't the most profitable one, so farmers need to balance yield against cost.
Key Findings
Combined biochar, wood ash, and lime raised soil pH from 5.2 to 6.8 and increased available phosphorus by 204.6%
Highest barley yield (4.31 t/ha) came from 10 t/ha biochar + 0.571 t/ha wood ash + 10 t/ha lime
A lower-biochar mix (5-0.571-10 t/ha) gave the best net profit at 368,668 ETB/ha, while a no-biochar mix (0-0.571-10 t/ha) had the best marginal return at 791.71%
chevron_right Technical Summary
Ethiopian researchers found that combining biochar, wood ash, and lime dramatically improves barley yields on acidic soils by raising pH and boosting available phosphorus, though the highest-yielding mix isn't the most economically efficient one.
Abstract Preview
Original paper
Optimizing soil amendments for food barley: biochar, wood ash, and lime synergies on acidic clay loam soil in Northeastern Ethiopia.
Soil acidity, characterized by aluminum toxicity and nutrient fixation, significantly limits food barley production in the Ethiopian highlands. This study evaluated the individual and combined effe...
open_in_new Read full abstractAbstract copyright held by the original publisher.
Species Mentioned
Was this useful?
Want to tell us more? (optional)
Thanks for the note!
Something went wrong — please try again.
Too many submissions. Try again in an hour.
Gene editing removes 97% of celiac-triggering proteins from bread wheat
It could mean that people with celiac disease — roughly 1 in 100 worldwide — may one day safely eat bread made from real wheat, without sacrificing the taste...
Barley, a member of the grass family, is a major cereal grain grown in temperate climates globally. One of the first cultivated grains, it was domesticated in the Fertile Crescent around 9000 BC, giving it nonshattering spikelets and making it much easier to harvest. Its use then spread throughou...