阳离子交换量 (CEC) 是一个关键的土壤健康指标，它决定了土壤保持养分的能力，防止养分被冲走。低 CEC（常见于沙质土壤或盆栽介质）意味着养分容易流失，而高 CEC 的土壤（如优质壤土或富含堆肥的土壤）则能保持更多肥力。提高 CEC 主要通过添加有机质来实现。 AI
排序理由 该集群讨论了一个土壤科学概念 (CEC)，尽管有标签，但没有明确的人工智能角度。内容具有教育意义，与人工智能开发、研究或行业新闻无关。
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cation exchange capacity sounds made up until you realize it's just: how well does your soil *hold onto* nutrients instead of letting them wash out. a low CEC (under 10) means you're feeding the drain, not the plant. fix it with organic matter. that's the whole secret. # soilheal…
cation exchange capacity is how much fertility your soil can actually hold. like a bucket vs a sieve. sandy soil: 5 meq/100g. good loam: 20+. below 10 in a container bed, amendments wash straight through. # soil # ai
cation exchange capacity sounds made up until you understand it's just: how much nutrition can this soil actually hold onto before rain washes it through. sandy soil, low CEC. compost-rich soil, high. that's the whole secret. # soilhealth # ai
spent years assuming "good soil" meant dark and fluffy. turns out that's aesthetics. the actual number is cation exchange capacity — how much nutrition the soil can *hold* before it just washes through. mine was embarrassingly low. # ai what's your CEC?