Conservation Agriculture in Zimbabwe: 7 Methods and What the Evidence Shows

Introduction: Conservation Agriculture in Zimbabwe

Conservation agriculture in Zimbabwe is promoted as a way to protect food security, soil health and rural livelihoods. Zimbabwe’s land—spanning from the vibrant BULAWAYO region to the resilient villages of Rushinga—faces mounting challenges from prolonged droughts, unpredictable rainfall, and the growing impacts of climate change. Farmers in Zimbabwe have traditionally relied on staple crops like maize and cotton. But with the realities of semi-arid conditions and declining maize yields due to El Niño and shifting weather patterns, many farming communities are looking at new, more resilient farming methods.

Today, conservation agriculture is about much more than just growing drought-resistant crops. It’s a whole-farm approach to soil health, water management, minimum land disturbance, and climate-smart practices like using traditional grains Zimbabwe—which aim at a more sustainable, food-secure future. In this comprehensive guide, we’ll look at seven practices that are often combined with conservation agriculture and that can help with drought resilience. We check each one against published research and field trials in Zimbabwe, Malawi and elsewhere.

This guide was written by the Farmonaut team, not by Zimbabwean farmers. It uses trial data from Zimbabwe and Malawi where it exists. The Iowa, Purdue and US adoption figures further down are US references for costs and practice, not Zimbabwe data.

Raising the Stakes: Agriculture Challenges and Droughts in Zimbabwe

Farmers in Zimbabwe live with volatile seasons and a close link between their fields and the environment. Maize and cotton have long been major cash crops. However, recurrent and prolonged droughts, price factors in the world cotton industry, and economic instability—such as currency volatility—have hurt livelihoods and food security. The impact of El Niño on agriculture has been profound, and the 2023/24 drought left millions of people short of food.

For instance, in 2024, after months of erratic rainfall, the government of Zimbabwe declared a state of disaster in April because of the El Niño drought, to mobilize resources for people facing hunger. Such crises—from northern areas like Rushinga to the wider BULAWAYO region—have highlighted the need for resilient, climate-smart agriculture that responds to these new realities.

Local knowledge matters too. Sorghum and millet were grown in the region long before maize spread, and some farmers combine them with conservation agriculture methods that research has tested.

The Zimbabwe Vulnerability Assessment Committee (ZimVAC) estimated that 4.7 million rural people were food insecure in July and August 2024. It projected 5.9 million at the peak of the lean season from January to March 2025 (WFP Zimbabwe country brief, December 2024).

Why Conservation Agriculture? Adapting Farming Practices for Resilience

What defines conservation agriculture? At its core, it is a set of farming practices built on three principles, which FAO sets out below. In practice, the list looks like this:

• Minimum Soil Disturbance: Using minimum tillage to reduce erosion and retain moisture.
• Crop Diversification: Rotating crops such as millet, sorghum, and cowpea to enhance soil fertility.
• Organic Matter Retention: Applying mulches or maintaining plant residue to help retain water and protect the soil.
• Added practices: Some farmers add agroforestry, intercropping or traditional grains. These are not among FAO’s three principles.

These practices have been tested in field trials across southern Africa. In Rushinga, a CIMMYT agronomist told the Inter Press Service in May 2025 that five years of side-by-side trials showed conservation agriculture consistently outperforming conventional ploughing, though results vary by year. That report gave no yield figures. A long-term on-farm study at Zimuto in Zimbabwe found that conservation agriculture maize earned a positive gross margin in two of four seasons and lost money in the two dry ones. Ploughed maize lost money in all four seasons, so conservation agriculture still did better than ploughing in every season.
At landscape scale, these methods are tied together by the principles set out in sustainable land management practices.

What FAO counts as conservation agriculture

FAO names three principles: minimal mechanical soil disturbance, permanent soil cover of at least 30% from residues or cover crops, and varied crop sequences with at least three crops (FAO). Methods 5 to 7 below (agroforestry, intercropping and traditional grains) suit dry areas, but they are not among these three principles.

Worldwide, conservation agriculture covered 205.4 million hectares in 2018/19, which is 14.7% of cropland, up from 106.5 million hectares in 2008/09 (Kassam et al., Agronomy, 2022). Africa had 3.1 million hectares, about 1.1% of its cropland. Among the national estimates in the same paper, South Africa reported 1.6 million hectares, Zambia 553,000, Mozambique 289,000, Malawi 211,000 and Zimbabwe about 100,000 (the Zimbabwe, Mozambique and Malawi figures are 2015/16 estimates carried forward).

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Conservation agriculture cropland by region

Million hectares, 2018/19

7 Conservation Agriculture Methods and Their Evidence

Here are seven practices that are often combined with conservation agriculture in semi-arid areas.

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Average yield change under conservation agriculture in sub-Saharan Africa

Percent above conventional tillage; 933 observations from 16 countries

1. Minimum Tillage: Reducing Soil Disturbance for Sustainable Farming in Semi-Arid Regions

Minimum tillage, a foundational principle of conservation agriculture, involves disturbing the soil as little as possible during crop planting and weed management. Rather than turning the earth heavily—as in traditional ploughing—farmers make planting stations or narrow seed slots.

• Benefits: This approach can limit soil structure breakdown and runoff, and water infiltration was higher under conservation agriculture at both trial sites. Soil carbon rose under conservation agriculture at Zimuto in Zimbabwe but not at Zidyana in Malawi, so it can raise soil organic matter in some soils over several seasons.
• In dry seasons: Less soil disturbance can limit evaporation from the soil. In low-rainfall seasons the evidence is mixed: a global review found that no-till helps rainfed crops in dry climates when residue cover and crop rotation are used with it.

Practical Example: When growing sorghum or millet using the minimum tillage method, farmers only open small holes or furrows for the seeds, leaving crop residues on the soil surface. Residues on the surface can shield the topsoil from direct sun and help moisture last longer.

Moreover, scientific research shows smaller and more variable gains than is often claimed. Across 933 observations from 16 sub-Saharan countries, yields under conservation agriculture were on average 3.7% higher than under conventional tillage for six major crops.

2. Mulching: Shielding Soil and Maximizing Water Retention

Mulching is the practice of covering the soil surface with organic materials—such as crop residues, grass, or leaves—after planting. This ancient yet effective farming method is integral to conservation agriculture.

• Key Advantages:
  • Reduces soil temperature fluctuation, benefiting growing crops in hot climates.
  • Can reduce water evaporation from the soil surface.
  • Suppresses weeds, decreasing competition for nutrients and water.
  • Improves soil organic content and encourages beneficial earthworm activity.

In Zimbabwe, particularly northern villages and Rushinga, mulching can cut evaporation and weed growth, but the residues must be available. In Zimuto, Zimbabwe, farmers reported that free-roaming cattle grazed the crop residues meant for soil cover.

Mulching helps protect the soil surface, and it can improve soil moisture and weed control. Mulching adds work, though: it took about 3 to 7 labour days per hectare in the Malawi and Zimbabwe trials.

3. Crop Rotation: Climate-Smart Agriculture for Soil Health and Yield Stability

Crop rotation is a centuries-old method that involves systematically growing different crops on the same plot in sequence, rather than mono-cropping (growing a single crop continuously). It is one of the three principles of conservation agriculture, and FAO asks for varied crop sequences with at least three different crops.

• Soil Health and Nutrient Balance: Rotating grains like sorghum and millet with legumes (such as cowpea) boosts soil nitrogen through biological fixation.
• Pest and Disease Control: Changing plant families each season disrupts pest and disease cycles, which can cut pesticide use; follow the product label and local rules for any pesticide you do use.
• Drought Resilience: Legumes before maize can add soil nitrogen. Whether rotation stores more water depends on the soil and rainfall.

A University of Wisconsin Extension summary reports corn yield 10 to 19% higher when rotated with soybean than when grown continuously. Rotations of maize with legumes in Zimbabwe were not measured in the sources used here. Read more on the crop rotation benefits for soil health. Rotation is often linked to higher yields, less disease pressure and better soil fertility, but the size of the effect depends on the crops, the soil and the rainfall.

Example rotation: Sorghum → Cowpea → Millet → Maize (as rainfall allows)

4. Cover Cropping: Building Resilient Soil and Improving Water Infiltration

Cover cropping refers to planting crops such as legumes, vetch, or grass species not for immediate consumption or sale, but to shield the soil during fallow periods.

• Moisture Management: These crops form a “living mulch,” which can conserve soil water and reduce topsoil loss, although cover crops also use water while they grow.
• Soil Fertility: Cover crops—especially legumes—can add nitrogen and organic matter to the soil.
• Weed Suppression: Vigorous ground cover helps prevent the growth of weeds, which can reduce herbicide needs, although managing the cover crop adds work.

Some farmers plant cowpea or sunhemp after harvest or in the off-season, before the main grain crop. Whether this pays depends on rainfall and seed cost; use the calculator below with your own numbers.

Cover cropping is a way to look after soil and water between main crops.

5. Agroforestry: Integrating Trees and Crops for Sustainable Farming

Agroforestry merges trees and crops within the same fields, harnessing the ecological benefits of both.

• Microclimate Improvement: Tree canopy can moderate temperature extremes and protect crops from wind, and it can reduce crop water stress, although trees also compete with crops for water.
• Soil Enrichment: Deep-rooted trees capture nutrients inaccessible to shallow-rooted crops, cycling them back to the topsoil through leaf litter.
• Income Diversification: Fruit, nut, or fuelwood trees can give another source of income in years of crop failure.

One example is Faidherbia albida, which is dormant and leafless in the early rainy season and regrows its leaves at the end of the wet season, so maize can grow under it. FAO describes this system in Malawi and Zambia, not in Zimbabwe, and reports maize yields 100 to 400 percent higher under the trees in Malawi.

Globally, monitoring your carbon footprint can be useful in agroforestry systems. Farmonaut has a carbon footprinting tool for tracking farm emissions.

6. Intercropping: Maximizing Land Use and Drought Protection

Intercropping is the simultaneous cultivation of two or more crops in the same field. In Zimbabwe’s smallholder systems, this often means sowing rows of sorghum or maize alongside legumes like cowpea or groundnut.

• Resource Efficiency: Different species utilize nutrients and water from different soil layers, improving total system productivity.
• Risk Diversification: If one crop fails due to drought, pests or disease, the other crop may still yield, stabilizing food and cash income.
• Soil Health: Legumes add nitrogen to the system, benefiting cereals and reducing need for synthetic fertilizers.

Through strategic intercropping—such as alternating rows of millet and cowpea, or maize and beans—farmers can build more diverse systems, although the fit depends on the soil and rainfall.

7. Traditional Grain Cultivation: Revitalizing Sorghum and Millet for Resilience

Reviving the cultivation of traditional grains (sorghum, millet) is a crop choice that fits dry areas. It is not one of the three conservation agriculture principles. Sorghum and millet are traditional crops in Zimbabwe. FAO and ICRISAT report that millets are better adapted to dry, infertile soils than most crops and can yield grain where annual rainfall is as low as 300 mm, against a minimum water need of 400 mm for sorghum and 500 to 600 mm for maize (1996).

• Ecosystem Synergy: Deep roots can help hold soil in place.
• Food Security: In dry years these grains can still give a harvest where maize struggles, which can lower hunger risk.
• Climate Adaptation: Many varieties mature early and tolerate heat, which can help farmers adapt to unpredictable seasons and El Niño years.

Growing sorghum and millet within a conservation agriculture system can keep a traditional crop in use and suits many dry areas.

What field trials in Zimbabwe and Malawi found

Researchers from CIMMYT and Total LandCare compared conservation agriculture with conventional tillage at Zidyana in Malawi and Zimuto in Zimbabwe (Thierfelder et al., Environments, 2015). At Zimuto, a low-rainfall area, yield gains showed from the second season on. Conservation agriculture maize earned a positive gross margin in two of the four seasons and lost money in the two dry ones. Ploughed maize lost money in all four seasons (gross margin from -7 to -272 USD per hectare), so conservation agriculture still did better than ploughing in every season. Soil carbon rose under conservation agriculture at Zimuto; at Zidyana, which was sampled once, it did not. At Zidyana the system saved 34 to 42 labour days per hectare, mostly on ridging and weeding. At Zimuto it saved no labour in most years. Farmers also named scarce crop residues, weeds, and the cost of seed, herbicide and seeders as problems.

The global picture is mixed too. A meta-analysis of 610 studies found that no-till alone lowered yields on average. Yields held up better when no-till was combined with residue cover and rotation, and rainfed crops in dry climates gained. The authors warned that smallholders often struggle to apply all three principles (Pittelkow et al., Nature, 2015). A University of Wisconsin Extension summary reports an average no-till change of -5.7%, and a 7.3% gain for rainfed crops in dry years. The Nature abstract says the gain in dry climates came when no-till was combined with residue retention and rotation (Lauer, 2015).

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Labour for maize: conventional vs conservation agriculture

Total labour days per hectare (d). Conservation agriculture seeded with a dibble stick at Zidyana and rip-line seeded at Zimuto.

How Farmonaut Helps Zimbabwean Farmers with Climate-Smart Agriculture

Farmonaut aims to make satellite crop monitoring accessible to farmers, from smallholders to agribusinesses, in Zimbabwe and beyond. We believe that smart use of technology and data-driven practices can help farmers watch their crops, plan inputs and respond to the effects of drought and climate change.

• Satellite-Based Monitoring: Get regularly updated satellite crop health, soil moisture and weather information using the Farmonaut mobile or web app. These maps can help you notice possible drought stress, pest issues or nutrient gaps sooner, but they do not replace a visit to the field.
• AI Advisory System: Use the Farmonaut Satellite + AI Farm Monitoring System to review satellite crop health data and weather information for your fields when you plan crops and inputs each season.
• Blockchain Traceability: Record where your sorghum, millet and other crops come from. Some buyers ask for this, and it may help your standing with them.
• Resource Management: Track and manage fleets & machinery Fleet Management solution, which is meant to help you track fuel and time use.
• Finance & Crop Insurance: Use satellite-based verification to help lenders and insurers check fields when they assess crop loans and insurance.

Satellite crop health maps are updated every few days, not in real time. They can help farmers compare fields and plan for El Niño risks as the climate grows more unpredictable.

Whether you’re a small-scale farmer in Rushinga or an agribusiness spanning multiple areas, Farmonaut offers tools for both.

Comparison Table of Conservation Agriculture Methods and the Evidence

The table above shows no yield or adoption percentage for each method, because no study gives one. The evidence column summarises only what this guide cites.

What a cover crop or a tillage pass costs

Costs decide whether a change pays. In Iowa in 2026, hiring a farmer to drill cover crop seed averaged $19.05 per acre (range $9 to $25) and aerial seeding $14.70, against $20.75 for a chisel plow pass and $19.20 for field cultivating. Those rates include fuel and labour, not seed (Iowa State University Extension, 2026). In a Purdue trial seeded in fall 2024, cereal rye seed cost $16.20 per acre at 45 lb per acre and $8.10 at a lower precision-seeded rate, and balansa clover cost $18.55 at the full rate (Purdue University, 2024-25 trial). The Iowa and Purdue figures are US references for costs and practice, not Zimbabwe data. They say nothing about hand-hoe or ripper systems. For Zimuto, the trial reported seed at 60 to 76 USD per hectare, fertiliser at 215 to 244 USD per hectare and labour at 3 to 4 USD per day (Thierfelder et al., Environments, 2015). Use your own local quotes in the calculator.

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What one field pass costs for hire in Iowa

US dollars per acre, 2026 custom rates, including fuel and labour but not seed

Try the numbers for your own farm below.

Sharing and Learning: Peer Knowledge Exchange in Rushinga

One of the most powerful engines for agricultural innovation is peer-to-peer knowledge exchange. In Rushinga, farmers are grouped in tens. Each farmer uses a 0.2 hectare conservation agriculture plot next to a conventional plot of the same size, and another 200 farmers in Rushinga apply what they learn (Inter Press Service, May 2025).

• Seeing Is Believing: Field days, visiting other farms, and exchange fairs let farmers see differences in yields, water use and drought stress between methods.
• Shared Data: When farmers record harvest results and weather, they can decide which crop species and practices suit their area and season.
• Community Resilience: Peer learning helps farmers judge a new practice on their own soil. Farmonaut crop health maps can add satellite data when comparing a trial plot with its neighbour.

CIMMYT researchers also planned a cross-site visit between Rushinga and Masvingo farmers in 2025, the kind of exchange that helps farmers judge methods on their own land.

Adoption: some farmers start, some stop

These census figures are a US reference, not Zimbabwe data. In the United States, no-till covered 27.5% of cropland in 2022, up from 25.3% in 2012, and cover crops 4.7%, up from 2.7%. Gains were partly offset by dropouts: in 1,261 counties, farmers stopped no-till on a combined 10.4 million acres between 2017 and 2022, which kept the national share almost flat (Plastina et al., Choices, 2024). In Africa the area under conservation agriculture grew from 1.5 to 3.1 million hectares between 2015/16 and 2018/19, from a very small base (Kassam et al., Agronomy, 2022).

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Share of US cropland in no-till and cover crops

Percent of total cropland, 48 contiguous states

Get Started with Farmonaut: Tools for Sustainable Farming in Semi-Arid Regions

Ready to integrate conservation agriculture and resilience-driven practices into your fields? Here are the Farmonaut tools that farmers and organizations in Zimbabwe can use:

• Satellite Crop Health Monitoring: View NDVI, soil moisture and crop growth stages from regularly updated satellite images. This can reduce guesswork in field management.
• AI Advisory: Advice for your fields that can include weather, irrigation and input recommendations, updated through the season.
• Fleet & Resource Management: Track farm machinery and plan logistics across a farm or cooperative using the Farmonaut Fleet Management Tool.
• Blockchain Traceability: Record the origin of your grains and traditional products for buyers (Farmonaut Traceability).
• Access to Finance: Satellite-based field verification that lenders and insurers can use when they assess crop loans and insurance. Discover more on Crop Loan & Insurance Solutions.
• Carbon Footprint Tracking: For those seeking carbon compliance or aiming for climate-smart labels, start with Farmonaut’s Carbon Footprinting tool.
• Large Scale Farm Management: Agribusinesses or cooperatives overseeing multiple fields can use the Farmonaut Agro Admin App for large scale farm management.

Ready to try it? Download our app and see the subscription options:

FAQs on Conservation Agriculture and Drought Resilience

Conclusion: Building a Resilient Future in Zimbabwean Agriculture

Zimbabwe’s farmers stand on the frontlines of climate change, but through conservation agriculture in Zimbabwe and the strategic adoption of drought resistant crops, farmers can change how they manage the land. The seven methods detailed above—minimum tillage, mulching, crop rotation, cover cropping, agroforestry, intercropping, and traditional grain cultivation—are practices with mixed evidence. At Zimuto, conservation agriculture beat ploughing in every season, yet it made a profit in only two of four. Some practices help in dry seasons, some add labour or cost, and results depend on rainfall, soil and residue supply.

Platforms like Farmonaut offer satellite-based monitoring, AI-based crop advisory, blockchain-enabled traceability, and strong resource management that can help farmers measure their fields and plan inputs.

Rains may stay erratic and droughts frequent. The evidence in this guide suggests testing each practice on a small plot first, keeping records, and comparing results with a neighbouring field.