In the quiet hills of Bungoma, where maize fields stretch into the horizon and farming is a legacy passed down through generations, something extraordinary is taking root not just maize, but prosperity. It’s not a new seed variety or a miracle pesticide. It’s lime. Ordinary soil lime, applied with care, is rewriting the story of smallholder farmers across Kenya.
For decades, farmers in Bungoma toiled under declining yields. No matter how hard they worked, their maize would not grow well. They thought it was the weather or the seed; what they didn’t know was that the real enemy was beneath their feet, acidic soil quietly choking their crop’s potential.
But in 2024, things began to change. Through a Strathmore Agri-food Innovation Center (SAFIC) -led data collection Survey, farmers applied 108kg of lime per acre to their one-acre farm, still far below the recommended 810kg. Yet even this modest addition sparked a revolution. Their yield doubled from an average of 850 kg to over 1.7 tonnes per acre, and their profits soared from KES 21,103 to KES 35,465 per acre. For the first time in many years, they had enough to feed their families and sell the rest.”
This isn’t an isolated success. The SAFIC 2025 Maize Survey across nine counties Bungoma, Trans-Nzoia, Kakamega, Nakuru, Bomet, Embu, Narok, Kitui, and Makueni reveals one stunning truth: liming acidic soils boosts maize yields by 63% on average and profits by more than KES 12,000 per acre. The data speaks for itself. On limed farms, farmers harvested 1.24 tonnes per acre, compared to just 0.76 tonnes without liming.
But while the yields speak loudly, the costs whisper truths too. Limed farms incur higher costs KES 41,588 per acre versus KES 32,375 but they are far more efficient. Their break-even price drops to KES 33.54/kg, well below the average farmgate price of KES 43.69. This buffer is what gives farmers the breathing room they’ve long been denied.
Yet, adoption remains uneven. Despite Bungoma’s success, most counties lag behind. In Trans-Nzoia, Kakamega, and Nakuru, farmers apply just 45-52 kg of lime per acre, barely 7% of the optimal amount. In Kitui and Makueni, liming hasn’t begun at all. Why? The challenges are well known: limited awareness, difficulties in accessing lime, and affordability concerns.
The potential, however, is undeniable. In Bungoma, even at the break-even price of KES 33.54/kg, farmers still earn a KES 17,286 profit per acre. At peak prices of KES 60.55/kg, profits climb beyond KES 65,000. Liming isn’t just good practice, it’s a transformative policy.
There’s more to this story. The survey shows that the majority of farmers already use hybrid seeds DK777, Duma, Hybrid 6213 yet without lime, these seeds can’t reach their full potential. Labour remains the largest expense, consuming over KES 15,000 per acre. Integrating lime into existing subsidy programs for seeds and fertilizers could radically improve returns on investment and farmer livelihoods.
The lesson is simple: it’s not about planting more land, but planting better. And for acidic soils, better begins with lime.
As the sun sets over the maize fields of Bungoma, it illuminates not just a thriving crop but the resilience of Kenya’s farmers and the promise of a future where knowledge, not luck, determines harvests.
Article By SAFIC Communications