The idea was simple, ambitious and eye-catching: to counter the threat of creeping desertification in Africa through a Great Green Wall of trees spanning the continent from Senegal in the west to Djibouti in the Horn of Africa in the east.

It would be 7,000 kilometres (4,340 miles) long, and seek to halt or reverse the encroachment of deserts threatening the livelihoods of tens of millions. Some estimates say up to a third of Africa's surface area is at risk.

Senegal's share of the wall is around 760,000 hectares (almost two million acres) stretching some 543 kilometres (330 miles) in length.

Sadly, the wall still has a long way to go before it can even come close to achieving its objectives.

The country started planting in 2005, but today it is easy to pass by the tiny trees without even noticing them.

In the savanna of the Sahel region at Ferlo in the north, the countryside is covered in pale green foliage at the end of the rainy season.

"Is that the Great Green Wall that the President (Abdoulaye) Wade talks about all over the world?" the Dakar-based driver of a jeep asks, failing to hide his disappointment at the first patch of shrubs.

Senegal's Great Green Wall is not yet a wall and not yet great. In fact it is better described as a series of patches of vegetation. But it is green.

In Widoy Thiengoly, the wall is made up of a string of ditches where small shoots of gum trees and date palms are planted. The biggest shoots, planted in 2005, are no more than knee-high.

-- 'The Great Wall is still tiny' --

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"In a zone with less than three months of rains you cannot expect spectacular results. These gum trees do not need extra water: they develop their extensive root system first and grow taller very slowly," Lieutenant Almamy Diarra of the water and forest service said.

"These are trees that support drought very well: in the dry season they shed their leaves to prevent the loss of water," he said.

The trees are also very well suited to stopping desertification. Their roots "fix the soil layers and facilitate water infiltration and this creates a microclimate that allows other plants to settle in the same area," he added.

Statistics in hand, another department official, Souleymane Ndoye, explained that they replanted 300 hectares (740 acres) in 2005, 400 in 2006 and 675 last year.

"This year the goal was to have 5,000 hectares reforested. With God's help we planted 5,230," he said.

"At the moment Senegal does not have the financial means to finish its part of the wall, Diarra explained.

"The Great Wall is still tiny," he conceded.

"We need to plant 25,000 hectares every year for at least 25 years... all the rural communities have to work on it at the same time."

The wall project has provided jobs for the village's young men in the tree nursery, Kadio Ka, the female chief of the village and a mother-of-eight told AFP.

"The majority of the people here raise livestock and harvest gum from the gum trees," she said.

"When those gum trees mature the whole village will profit from them."

But ranger Ndoye warns that the villagers will have to be patient.

"Reforestation over a 543-kilometre area in Senegal will take several generations," he added.