KMT Research
Enhancing Market Access and Use of Agricultural Lime
Research shows soils in Western Kenya is not only acidic but they also suffer from soil nutrient depletion. Farming is not optimal on account of high risks associated with dependence on rain-fed agriculture, high input prices, and low farm-gate prices.

What Informed The Study?
Research shows soils in Western Kenya is not only acidic but they also suffer from soil nutrient depletion.
Farming Is Not Optimal
Farming is not optimal on account of high risks associated with dependence on rain-fed agriculture, high input prices, and low farm- gate prices.
Low Productivity
Agricultural productivity is low because of low utilisation of yield-raising inputs, inadequate irrigation, low soil fertility, high soil acidity and reliance on manual labour for farm production.
Acidic Soil
The Ministry of Agriculture estimates that around 50% of smallholders in western Kenya may be farming soils with pH below 5.5.
Lime As A Remedy For Soil Acidity
Lime is one of the major solutions to soil acidity
The application of agricultural lime, a calcium- containing product processed from limestone, gypsum or dolomite increases the soil pH, reduces the solubility of the toxic elements and increases availability of nutrients to plant roots.
Lime also helps in biological nitrogen fixation in legumes and general microbial activity. Although agricultural lime is produced in Kenya and used by large-scale farmers, historically, its use by small-scale farmers has been low.

Challenges Of Lime Market And Lime Use
Some of the key challenges in the expansion of the lime market and use of lime by farmers included;
Many farmers still expect government and donor agencies to help them acquire lime.
They view the cost of lime as being prohibitive and so they do not perceive lime as a viable way to improve their farming business.
Farmers perceive lime application as a bulky and costly process.
That whereas farmers appreciate that lime is good for correcting soil acidity, they perceive it as a bulky, dusty commodity requiring a lot of labour for application.
Some farmers due to limited knowledge on liming, end up mixing lime and fertiliser during planting.
Also they do not adhere to the recommended lime application rates.
Why Some Farmers Fail To Retest Soil For Acidity
From the study, only two households had redone soil testing. The reasons for not retesting soil were reported to be;
Financial constraints; and the crops were still doing well.
It was less than three years since the last test.
Lack of service providers
About This Research
Objectives Of The Study
Objective 1
To establish the existing knowledge levels, knowledge gaps and information awareness on lime and soil testing services among smallholder farmers in western Kenya region
Objective 2
To demonstrate the impact of lime use and soil testing services on farm productivity, yields and farmer incomes in western region
Objective 3
To establish uptake levels of lime use and soil testing services among smallholder farmers in western Kenya region
Objective 4
To demonstrate the intervention’s impact on cross-cutting issues, including climate resilience and gender
Objective 5
To establish the change in business performance, market share, sales and revenue for the lime manufacturing partner and its distribution networks through sales of lime and soil testing services
Key Findings From The Study
It appears that some farmers know about soil acidity and liming but not about soil testing
- Not Productive
- Productive
80% of the households believed that their farms were not producing at maximum yield
91% believed that crop yield could be improved by monitoring soil health in their farms.
Out of 518 households, 54 households (10.4%) had undertaken soil tests while 34 households (7%) had done liming.
Farmers had several sources of information on lime. The three major sources were NGOs, extension officers and fellow farmers.
Sources of Information About Lime

Challenges in Expansion
When To Lime Soils: A big dilemma for most farmers
Lack of clarity on when soils require liming was demonstrated by responses from households. When asked on when soils required lime, three major responses were given: “When there is low crop production”; “when soil acidity is high”; and “during land preparation” These responses accounted for 70% of all the responses. Some respondents had no idea when soils require liming. Other responses included: “during planting”, “when there is low soil fertility”, “after soil testing”, “when there is Striga weed”, and “when top dressing”.
- Percentage
Conclusion: The Key Observations
Western Region Soil Quality
Empirical studies by KALRO and university scientists have indicated that soil acidity and low fertility are widespread in soils in the western region.
High Cost Perception
The main reason why farmers had not adopted soil testing was the perception of high cost without a clear understanding of the benefits thereof.
Inconsistency In Farmers Knowledge
There exists lack of harmony in the messages given to farmers by different stakeholders about lime. This situation is exacerbated by lack of a policy on lime and fertilisers.
Lime Use Projects Implementation
For more than a decade, lime use projects have been implemented in the western region and as a result many farmers have become aware about lime and soil testing services.
Studies on the Economics of Lime
There seems not to be any study that has addressed the economics of lime application explicitly comparing the costs and benefits of the technology. The demo farms ought to have included such a component.
Information on Lime Packaging
Lime packaging does not contain adequate information about lime such as application instructions. The exception is brief safety instructions in the packaging by HLCL.
Farmers Testing Their Soil
Only a minority of farmers paid commercial rates for having their soils tested; the majority of farmers obtained services subsidised by the County Government or the Equity Group Foundation. Only a minority of farmers had purchased lime.
Key Recommendations
Soil Testing Information
Farmers need to be given consistent information about the importance of soil testing prior to application of lime and fertilisers.
Bridging The Farmer To Service Provider Gap
The gap between farmers and service providers can be bridged by youth (they have better education) that take the opportunity to invest in a combined service offer of soil testing (using soil scanners; acting as agents for soil testing labs for more detailed tests) and bringing lime from agrovets/suppliers to the farmers at affordable prices.
Facilitating Dialogue Among Stakeholders
KMT should take the lead in facilitating dialogue among stakeholders (lime manufacturers, fertiliser companies, Ministry of Agriculture, KALRO, input distributors, county governments, etc) to promote advocacy for finalisation of a policy on agricultural lime and fertilisers that includes minimum technical information that should be provided to farmers on fertilisers and lime.
Collaboration Between Stakeholders
There is need for the GoK Extension Officers, NGOs, research organisations, development partners and government to collaborate to ensure that the information given to farmers is correct and area-specific.
Cost & Benefits Studies
Studies on the economics of lime application explicitly comparing the costs and benefits of the technology are required; such data should then be used in extension messages to assist farmers assess for themselves the value liming adds to their farming.
Information On Health Risks
Crushed limestone is in powder form. If inhaled in excessive quantities over a prolonged period or extended period, respirable dust can constitute a long term health hazard. Dust inhaled or exposed to the eyes can cause severe burning of the eyes and mucous membranes. Therefore, inhalation of dust from aggregates should be avoided through wearing of personal protective equipment.
County Government Involvement
County Governments especially in those counties with high levels of soil acidity should support the exploration of agricultural limestone deposits.
Poor Farmers
There is a need for a paradigm change in soil testing and supply of lime to poor farmers. Currently the rate of adoption of these goods and services by smallholder farmers is low.
Guides For Farmers
An effort by a combined team of researchers and extension personnel could make an important contribution by preparing a simple manual/guide for farmers with information on different options in liming and the associated costs for guiding farmers.

Enhancing Market Access and Use of Agricultural Lime
Early Impact Assessment Report (Abridged Version)
Format: PDF
Size:
Summary Version: 1.6 MB