SUBSISTENCE FARMERS in AFRICA 2

 SUBSISTENCE FARMERS NEED HOPE
Subsistence Farmers

Consider the livelihoods of the tens of millions of vulnerable subsistence small-holder farmers around the world. In 20 to 25 years we will get to a point in some places that either it will be too hot, too dry, too wet, or too cold for the crops we are planting and you, which will be incredibly disruptive at best.

Over the last two decades, either early or late on set of rainy seasons, unexpected rainfall, declining rainfall, and extreme day and night temperature are common.

According to The International Fund for Agricultural Development (IFAD), 75% of the world’s 1.2 billion poor (defined as consuming less than one purchasing-power adjusted dollar per day) live and work in rural areas. 50% of the developing-country rural population were smallholders (farming 3 ha or less of crop land), and ≈25% were landless. The proportion of smallholders in sub-Saharan Africa was higher at 73%. 

Environmental degradation in such tropical dry land areas is widespread, irreversible or appropriately referred to as “desertification”. All this, and other stressors, are seen as contributing to an increased vulnerability to drought, which in turn feeds back in to environmental degradation and conflict. There will be eventual impacts on human development indicators such as health and education.

There is a bright side: increasingly unstable weather in recent years has left many farmers more willing to try new ideas. Many are now open to adapting of using practices like crop diversification, planting date adjustment, soil and water conservation and management, increasing the intensity of input use, integrating crop with livestock and rabbits, and tree planting. Subsistence Farmers

  • ·         Small-holder farmers can shift to irrigated farming in the face of climate variability.
  • ·         Small-holder farmers can hold some wealth in bank accounts, and others use micro finance credit to expand.
  • ·         Small-holder farmers can use supplementary feed for livestock, purchased or lopped from trees in their orchards.
  • ·         Small-holder farmers can engage in rabbit accumulation as a rational form of insurance against drought. 

 FOOD AID: EARLY SOLUTIONS NOW

Why in a “world of plenty” are 20 million people face famine? Continue reading SUBSISTENCE FARMERS in AFRICA 2

Charity and Corporate Aid 2

A growing share of aid is spent by private firms, not charities

“THE gold rush is on!” That is how a cable from the American ambassador to Haiti described the descent of foreign firms upon Port-Au-Prince in early 2010. An earthquake had flattened the city and killed hundreds of thousands. This becomes a bonanza for charity services and corporate aid offered by private firms.

Charity Corporate aid

A deluge of aid presented an opportunity. The message, released by WikiLeaks, noted that AshBritt, a Florida-based disaster-recovery firm, was trying to sell a scheme to restore government buildings, and that other firms were also pitching proposals in a “veritable free-for-all”.

During the following two years $6 billion in aid flooded into a country of 10 million people, for everything from rebuilding homes to supporting pro-American political parties. Of $500 million or so in aid contracts from the American agency for international development (USAID), roughly 70% passed through the hands of private companies.

Haiti is one example of a trend of non-profit foundations, where aid is funneled through consultancies and other private-sector contractors that profit from the work. Nearly a quarter of USAID spending in 2016 went to for-profit firms, a share that was two-thirds higher than in 2008.

Charity Corporate aid

Think-tanks are still trying to work out where all the Haitian disaster-relief funding ended up. Private-sector involvement can further obscure the picture, because the winners of bids may use a host of subcontractors, or insist that some information is kept confidential for commercial reasons.

Even as aid budgets have grown, governments have sought to make aid departments smaller and more nimble. USAID have around the same number of employees now as they did when their budgets were just half as large in real terms. As aid agencies struggle to manage contracts, they have turned to the private sector.

Typically, firms win aid contracts at auction, rather than receiving grants, as charities do. Some have become global players. Chemonics, an American firm founded in 1975, is active in 70 countries. In 2015 it won a contract for health-care services with USAID worth up to $10.5 billion over eight years.

Together with the high cost of preparing bids—as much as $100,000—this has led to market concentration. Only large bidders can stomach the risks. A smaller firm’s best chance to pick up some of this work is to join a consortium led by a larger firm.

Charity Corporate aid

Private firms do seem to pay higher salaries than charities to their top executives. The bosses of the private firms earn on average more than $500,000 a year—more than twice as much as their non-profit peers. The total personnel costs proposed by non-profit firms were on average just two-fifths those proposed by private firms. What is more, the contracts won by for-profit outfits were more likely to bust their budgets and miss deadlines.

One reason for the shift towards the private sector is the changing nature of aid. A smaller share now is made up of traditional projects, such as building schools or handing out food parcels, and more is “technical assistance”, for example to streamline a country’s tax code and strengthen tax collection, or to set up an insurance scheme to help farmers when crops fail. Private firms may be best-placed to advise on, or even run, these schemes.

What is known, though, is that for-profit and non-profit groups work differently. A non-profit body typically has large bureaus in the countries where it works, or forms long-standing partnerships with local charities that do. It will consider whether a proposed project fits with its charitable purpose, and whether it has suitable in-house expertise; only then will it decide whether to bid. Firms, by contrast, tend to have fewer staff, and to rely on subcontractors and freelance experts who can be flown in for as long as a project lasts. This model means that firms may be less likely to understand local cultures, build relationships with governments and monitor long-term results. But it can also be more flexible, with firms matching expertise and staffing to each contract.

Cool aidCharity Corporate aid

One estimate puts the total value to firms of such “aid-like” work in developing countries at around $20 billion a year, a figure that is expected to rise. Having built their businesses on contracts with Western governments, private aid firms may need to diversify if they are to continue to thrive.

To shed light on the shift towards private-sector aid delivery, The Economist has analyzed 4,500 subcontracts from USAID worth more than $25,000 each. (All were granted since 2010. Those for which data were not available were excluded.) A third went to for-profit firms, and the rest to charities, NGOs or other governments. For contracts where a firm was the primary contractor, on average 41% of subcontracts went to other firms.

How to be the Change

Continue reading Charity and Corporate Aid 2

Enough Food for the Future? 2

Is There Enough Food for the Future?world food crisis

The new UN climate report shows that crop yields already are being adversely affected by a changing climate, and how we respond globally in creating a more resilient food system is very important now. But we also recognize that food is central to our culture and is a source of great pleasure and comfort to people. We want to ensure we tackle all aspects so that we have enough food for the future.

world food crisis

The estimate of more than 9 billion people in less than 40 years highlights a stark challenge for the global food system.

We have enough food for the roughly 7 billion people alive today, but nearly a billion are hungry or malnourished, mostly due to poverty and unequal distribution. To feed those who are currently hungry—and the additional 2 billion-plus people who will live on the planet by 2050—our best projections are that crop production will need to increase between 60 and 100 percent. “Business as usual” could lead to a doubling of demand for agricultural production.

If the population is growing by less than one-third, why would the overall demand double? Simply stated: more people have more money.

Meeting the problem through production alone won’t be enough, and we should explore many alternatives that focus on reducing demand for food, like changing our diets and reducing food waste and loss. Increasing crop production can be part of the solution.

What drives the demand?

Continue reading Enough Food for the Future? 2

Age of Consequences 2

Climate Security: Building National Security

Climate change presents the greatest challenge of our time. It is a national security threat that America’s military, and militaries around the world are taking seriously. We are entering into the Age of Consequences.

Age of Consequences

Climate change alone will not cause wars, but it serves as an “Accelerant of Instability” or a “Threat Multiplier” that makes already existing threats worse. The threat of global warming for security will manifest through a range of effects: resource scarcity, extreme weather, food scarcity, water insecurity, and sea level rise will all threaten societies around the world. Too many governments are not prepared for these threats, either because they do not have the resources or because they have not planned ahead. How societies and governments respond to the increase in instability will determine whether climate change will lead to war. We’re really talking about violent events that require less organization like protests, riots and strikes.

  • The science is definitive enough for action. We cannot wait until you have 100% certainty before acting.
  • Climate change alone will not cause war, but it serves as an “accelerant of instability” that makes already existing threats worse.
  • Global threats include: migration, conflict over scarce resources, reduced food production, water insecurity, and others.
  • The military is preparing for climate change by, studying potential threats, and preparing to deploy when needed.

A perfect example of a national security treat was the Arab Spring. The terrific drought that struck that entire region in 2010 had global ramifications. It was especially disastrous for Egypt. The drought caused Russia and other exporters to end wheat exports.  Somewhat unexpected, it made a major contribution to the blossoming of the Arab Spring. The country has only been able to sustain about half its needs True, there was also a desire to embrace democracy, but that wasn’t what really drove the masses: it was the lack of wheat.

Sahel Africa

Traditionally, most of the people in the Sahel have been semi-nomads, farming and raising livestock in a system of transhumance, which is probably the most sustainable way of utilizing the Sahel. The Sahel, home to some 232 million people, comprising portions of ten (10) African countries, from left to right: [northern] Senegal, [southern] Mauritania, [central] Mali, [northern] Burkina Faso, [southern] Algeria, [southwestern] Niger, [northern] Nigeria, [central] Chad, [central] Sudan and [northern] Eritrea.

Sahel Africa

Contrast the situation in Ethiopia where these conditions are almost identical to Somali and South Sudan, which both have very poor governance. Ethiopia on the other hand is an active participant in the international climate change process of the UNFCCC, the United Nations Framework Convention on Climate Change involved with risk mitigation and farmer adaptation. Generally, Ethiopia has not suffered in the same way as both South Sudan and Somali.

WHAT TO DO?

Continue reading Age of Consequences 2

WATER CRISIS: A CATASTROPHE 2

  • TODAY’S CRISIS WILL BECOME A CATASTROPHE.

water crisisIf water is not managed better…water OUR THIRSTY WORLD

As water becomes ever more scant the world needs to conserve it, use it more efficiently. Researchers from MIT predict that by 2050, more than half of humanity will live in water-stressed areas, where people are now extracting unsustainable amounts from available freshwater sources.  We can expect a water crisis that will go viral into a catastrophe if we continue with business as usual.

Many people have a strong moral aversion to paying for the life-sustaining liquid. Some feel that water is a right, and should therefore be free. Others lobby governments to subsidize its distribution to favored groups. This results in vast, but preventable waste.

To make matters worse, few places price water properly. Usually, it is artificially cheap, because politicians are scared to charge much for something essential that falls from the sky. This means that consumers have little incentive to conserve it and investors have little incentive to build pipes and other infrastructure to bring it to where it is needed most.

water scarcity

In many countries people can pump as much water as they like from underground aquifers, because rules are either lax or not enforced. But it is unsustainable: around a fifth of the world’s aquifers are over-exploited.

.water crisis

India appears to be headed for a very great water crisis because of the inexpensive available pumps together with a large population:
GROUND WATER USAGE

People do not drink much water—only a few liters a day. But putting food on their tables requires floods of the stuff. Growing 1 lb of wheat takes 125 gallons of water; fattening a cow to produce the same weight of beef involves 12 times more. Overall, agriculture accounts for more than 70% of global freshwater withdrawals. Farmers in parched places grow thirsty cash crops such as avocados, which could easily be imported from somewhere wetter.

THE COMING CRISIS

Continue reading WATER CRISIS: A CATASTROPHE 2

Decentralized Tree Nurseries in Africa 2

DECENTRALIZED TREE NURSERIES

More than 92 percent of all nurseries catering for villages are still located at regional and district levels. As a result, seedlings have to be transported long distances, sometimes even beyond 50 km. The inadequacy of transport is one of the major setbacks in tree-planting, in terms of both availability and cost. All efforts must be made to decentralize nurseries as much as conditions allow.

To bridge this energy supply-demand gap, a massive amount of tree-planting is needed. The natural forest is shrinking very fast, and most alternative energy sources have had no significant impact so far.

One of the main reasons tree-planting is failing among some African communities is that they are often given species only for firewood, like eucalyptus. 

 Weak village leadership contributes directly to delays over deciding whether to plant trees or not; and then, even if trees are planted, it can retard or neglect maintenance.

THE NEXT STEP: ORCHARDS AND BIOCHAR

Each woman farmer and their family will begin the task of preparing to plant 300 fruit and nut trees on their leased 1.5 acre farms, Every tree will need a 2- 3 feet diameter excavation, where a biochar earth mound will be built of branches.

nursery layout2

EARTH MOUND KILN

biochar mound

The earth mound kiln is built in the following manner:

The bottom of the base is covered with logs forming a grate or crib on which the wood is piled vertically. The grate forms a free space between the bottom and the wood charge through which the air necessary for the carbonization process passes. The piled wood is covered with leaves and grass and then earth about 20 cm (8”) thick.

The pile has an outside stack made of steel drums, which is connected to the pile through a flue cut into the ground, running under the pile and covered with round logs. The pile has a number of air vents located around the circular base.

biochar soil management

The carbonization process is started by introducing a torch into the firing flue opposite the stack. This type of pile is reported to be easy to operate to produce good charcoal quality with a yield of 55% charcoal to wood by volume. The pile’s volume varies from 100 to 250 m³ of wood. The whole cycle takes 24 days; four days for charging, six days for carbonization, ten days for cooling and four days for discharge.

 Carbon Emission to be Solved

Continue reading Decentralized Tree Nurseries in Africa 2

DEFORESTATION PREVENTION 2

 PREVENTING DEFORESTATION

Preventing deforestation is our best chance to conserve wildlife and defend the rights of forest communities. It’s one of the quickest and most cost effective ways to curb global warming.

Worldwide, two billion hectares of land are currently degraded – an area larger than South America. Of this, 500 million hectares are abandoned agricultural land.

The amount of under-utilized and degraded land available in the region to accommodate for future agricultural expansion is estimated at 0.7-1 million hectares.

The Suitability Mapper enables users to identify potentially suitable sites for sustainable palm oil production in the following area:

degraded land

How do we prevent further deforestation?

It is still economically valuable to clear the forest for plantations. As current agricultural land becomes more and more degraded, producers move on to pristine, more productive land, with often harmful consequences such as the loss of forest cover.

If we’re going to stop deforestation, we need governments to do their part. That starts with cracking down on corruption and ensuring fair enforcement of forest conservation rules. Corruption fuels illegal logging and unsustainable forest management.

What is behind DEFORESTATION?

Continue reading DEFORESTATION PREVENTION 2

MITIGATION OF EMISSIONS 2

MITIGATION OF EMISSIONS

water dry facts

The seriousness of carbon emissions and the resulting impacts of those emissions are starting to have a strong effect on our global environment. From the melting of glacial systems around the world to the increasing intensity of storms and droughts, never has humanity faced a greater challenge than what lies before us today. One only has to observe the historic CO2 levels over the last 800,000 years and compare those numbers to where we are today at 400 ppm to get a clear picture. We need mitigation of emissions.

ONE SMALL STEP

Replacing “three stone” stoves with pyrolytic stoves provides a health dividend equal the eradication of malaria & AIDs combined. Mitigation of the emissions is the primary aim of these innovative cook stoves.

THE COOK STOVE

* About 30% biochar production
* 3 to 4 days for a batch of charcoal production
* Continuous hot water access (pot 1)
* Highly suitable for institutional cooking and as well making biochar
* Additional heat generated by flaring the pyrolysis gases, used for cooking
* Mitigation of the emissions during the pyrolysis by flaring
* Costs about Rs. 3000 (US$45)

 biochar8

 

biochar7Mwoto TLUD Cookstove is made of sheet metal: fabricated by skilled tinsmiths. Price approx. US$20 (Kenya: $22). The primary air control permits significant turn-down of fire intensity.  (Mwoto Factories Ltd., Kampala)

degraded-land22a mwoto-stove

The Progress Ahead Dr TLUD estimates that only about 20% of what can be known about TLUD gasifiers has been discovered. 80% awaits our efforts. By 2020 there needs to be 30 million TLUD micro-gasifier istoves into the developing societies. Currently there are fewer than one million. www.Mwotostove.com

This is a good example of Mitigation of Emissions:

degraded-land27-a

Carbon Emission to be Solved

Continue reading MITIGATION OF EMISSIONS 2

SUSTAINABLE BIOCHAR AND GLOBAL WARMING 2

SUSTAINABLE BIOCHARBIOCHAR SOLUTIONS

Sustainable biochar is a powerfully simple tool to fight global warming. This 2,000 year-old practice converts agricultural waste into a soil enhancer that can hold carbon, boost food security, and discourage deforestation. Sustainable biochar is one of the few technologies that are relatively inexpensive, widely applicable, and quickly scalable.

Farmers in Brazil have long known about the “black earth,” or terra preta, found over vast areas of the Amazon. In the last decade or two archaeologists have begun to realise that the terra preta was not a naturally occurring phenomenon, but had been cultivated over centuries, if not millennia.  They turned some of the wood into charcoal and then worked it back into the soil, creating an unusually rich and fertile ground.

Traditionally, people have used biochar and ash in their fields. This practice exists all over the world. There is a need to recognize the value and create awareness on biochar. Farmers know that wherever biomass is burnt in the field’s crop grows stronger, healthier and better.

 In East Africa, sugarcane and maize waste is normally burned in the field, as it has no other value. In-field burning returns approximately 2-5% of the original carbon to the soil and a negligible amount of NPK.  It does little to improve soil, and is considered a major source of particulate and soot emissions in the region.

Burning without oxygen can also mean burning without smoke, which leads to the idea of replacing home heating and cooking stoves with pyrolizing kilns that provide the same functions but are clean-burning, inexpensive and easy to use, and instead of generating smoke and ash.

Biochar is essentially charcoal, but burnt at a lower temperature and with a more restricted flow of oxygen; it has the potential to end the slash-and-burn cycle in Sub-Saharan Africa.

According to researcher Bruno Glaser at the University of Bayreuth, Germany, a hectare of meter-deep terra preta can hold 250 tons of carbon, as opposed to 100 tons of carbon in unimproved soils. 

THAT MEANS THAT THERE IS A POTENTIAL  OF 150 TONS OF CARBON CAPTURE/ HA POSSIBLE. (THIS DOES NOT INCLUDE THE FORESTATION ON THE SAME HECTARE)

In addition, the bio-char itself increases soil fertility, which allows farmers to grow more plants, which allows more bio-char to be added to the soil. Johannes Lehman, author of Amazonian Dark Earths, claims that combining bio-char and bio-fuels could draw down 9.5 billion tons per year, or 35 Gt CO2 per year equal to all our current fossil fuel emissions.

Biochar Trenches

This is the simplest and convenient method for farmers to convert the crop residue / biomass in the farm lands into biochar trenches. All the biochar, burnt soil remains within the field could be conveniently spread by the farmer within the whole field.

It is more convenient to make such trenches after ploughing the field. Trenches perpendicular to the slopes also benefit the steep sloppy areas as water harvesting means. The entire crop residue otherwise burnt openly can be collected and dumped into these trenches lengthwise. More biomass can be added during the process. Once the trench is filled with biomass and compact, it should be covered by grass, weeds, broad leaves, etc. After covering it up, soil should be spread on the trench, a lengthy mound is created. Some water could be used to make the soil compact and for sealing the mound of biomass. A small hole is left open for lighting the biomass at one end and at the other end a very small opening is left open. Once it is lit, white smoke starts emitting at the other end. The result is a smoking mound over the trenches.  

When it smokes too much or when it cracks, too much oxygen is getting in. You must plastered more mud and earth over that part until the leak was stopped. You must keep an eye on the smoke, in order to stop the burn when it changed color. You can stop it by covering it with more earth to entirely cut off the oxygen.biochar-soil-management8

The trenches are 2 to 3 feet depth and 1.5 to 2 feet width. Small holes are to be made in a biochar along the length of the trench at every 10 to 15 feet in a biochar trench. After 24 hours the biomass is converted into biochar. Any little smoke or embers should be quenched with water or covered with soil while removing the biochar from the trench.

The alternative is to burn the biomass openly, which causes pollution and very little carbon is formed.

Over the three year study period, t was observed that the chances of seeds germination are 20% to 30% higher in the soils with biochar compared to control soils. All soil properties except pH showed significant changes. In both biochar amended and control soils, salt, manganese, and potash content showed consistent increases while phosphate content decreased.  Additional phosphate fertilizer may be needed. Organic phosphorus fertilizers come primarily from mineral sources, like rock dust or from bone sources such as steamed bone meal or fish bone meal.

biochar-soil-management23

Cacao plants planted into soil rich in biochar started producing fruits half the normal time. Plants seem to be supported for longer and there is less yellowing of leaves. 

BIOCHAR COMPOSTdegraded-land24

Continue reading SUSTAINABLE BIOCHAR AND GLOBAL WARMING 2

Productive African Farms and Emissions 2

More productive African farms could help both people and emissions.

Boosting the efficiency of Africa’s productive lands is not only necessary for feeding larger populations, but also a possible means of reducing emissions.

degraded-land3

An article in the Economist, “World climate talks address agriculture” identifies the problem.

SINCE the 1960s farm production has risen fourfold in Africa. But the continent still lags far behind the gains seen in South America and Asia. The extra food has appeared largely because more land has been planted or grazed, rather than because crop yields have improved. Instead, poor farming methods progressively deplete nutrients from soils; almost all arable land in Africa lacks irrigation, for example. This is a particular problem in a continent whose population is set to double by 2050 and which faces regular droughts, floods and heat waves.

The world is already 1°C warmer than it was in pre-industrial times. As it heats further, weather cycles are set to speed up, leaving wet parts of the world wetter and dry parts drier. At either end of the scale, extreme weather events will probably intensify. By 2050, even if temperature rise is successfully limited to 2°C, crop yields could slump by a fifth.

The costs of climate change already come each year to 1.5% of the continent’s GDP, according to the European Commission, and adapting to it will cost another 3% each year until 2030. This is in spite of the fact that, overall, Africa is responsible for just 4% of global emissions annually.

Soil: potential carbon sinks

Fertilizer is extremely important. We cannot feed people if soil is degraded. The production of fertilizer in a form of biochar is absolutely huge which help to absorb carbon in the soils.

Soil in a long-term experiment appears red when depleted of carbon (left) and dark brown when carbon content is high (right).

Scientists say that more carbon resides in soil than in the atmosphere and all plant life combined; there are 2,500 billion tons of carbon in soil, compared with 800 billion tons in the atmosphere and 560 billion tons in plant and animal life. 

degraded land
Soil in a long-term experiment appears red when depleted of carbon (left) and dark brown when carbon content is high (right).

Well-nourished soils are better at absorbing carbon dioxide rather than allowing it to enter the atmosphere. But the continent’s over-grazed, over-used soil currently means Africa only stores 175 gigatons of carbon each year of the 1,500 gigatons stored in the world’s soils. Smarter farming could change all that. The world’s cultivated soils have lost between 50 and 70 percent of their original carbon stock, much of which has oxidized upon exposure to air to become CO2

If we treat soil carbon as a renewable resource, we can change the dynamics.  Restoring soils of degraded and desertified ecosystems has the potential to store in world soils an additional 1 billion to 3 billion tons of carbon annually, equivalent to roughly 3.5 billion to 11 billion tons of CO2 emissions. (Annual CO2 emissions from fossil fuel burning are roughly 32 billion tons.) 

 Soil carbon sequestration needs to be part of the picture. Currently deforestation takes place where vast areas are cleared for new fields because too little grows in existing ones.

degraded-land13

Vast areas of deforested land that have been abandoned after soil degradation are excellent candidates for replanting and reforestation using biochar from the weeds now growing there. According to the UN’s Food and Agriculture Organization, grasslands, which cover more than a quarter of the world’s land, hold 20 percent of the world’s soil carbon stock. Much of this land is degraded.

The biochar solution for small farms involves branches of fruit trees, which are cut every year to facilitate the harvest, weigh about 50 tons/ha. If this biomass is converted by pyrolysis to biochar, about 1/3 will revert to 16.7 tons of black carbon/ha and this can be mixed with compost. This will enhance the way biochar develops microbes.

Biochar

If one third of the degraded land, 660 million ha, are used and every year 15 tons/ha biochar is mixed in the soil, this will be together 10 billion tons of Carbon (10 Gt carbon is equivalent to 3.7 Gt CO2) taken from the air and stored in the soil. This is the amount of fossil CO2 which is just released every year.

co2-emissions

The only problem with this solution is the scale. Imagine what it means to use soil carbon sequestration techniques on 10% of all arable land: Millions of farmers must change their way of doing agriculture to make it happen. But the alternative — staying the course of ecological ruin — is not very appealing. 

Hilly Lands

Hilly Land Sustainable Agriculture (HLSA) farming systems feature the establishment of single or double hedgerows of either leguminous tree species, shrubs or grasses seeded or planted along contour lines. Hedgerows, serving as barriers, will conserve surface soil by building up organic mass, increasing plant nutrient elements and improving the water holding  capacity of the soil, thus conserving surface soil by slowing down erosion. Rocks,stubble,  branches and other farm debris are piled at the base of the hedges to further reinforce the foundation of the hedgerows. 

The densely planted hedgerows are pruned regularly to encourage the growth of a thick vegetative canopy and provide a continuous supply of green manure that is scattered on the planting strips between hedgerows.

Trees or shrubs alone used as hedges cannot control effectively soil erosion that can lead to flooding and mass destruction of hilly lands that took centuries to build.

Vetiver grass (Vetiveria zizanioides) provides high biomass production for hedgerows; they have been successfully used in some parts of Thailand, Indonesia, China, and India. The grass has the potential to markedly reduce erosion and rapidly develop natural terraces on slopes with less management attention. It stays alive for 25 to 45 years without being replanted.

AFRICA AGRICULTURAL HOPESPOTS

Continue reading Productive African Farms and Emissions 2

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