More than 150 people were killed on the densely-populated island in two separate landslides earlier this month, and activists warn that the destruction of forests for logging and farming means that more disasters will follow.

"This job does not give us enough money but farming is the best option we have. So being buried by a landslide is the last thing on my mind," says Robiyanti, who works a patch of these hills with her husband Iswahyudi.

"We know we do not have enough money and we are not smart people, but I do not want my children to grow up poor like myself," says the 32-year-old, who began working these fields a year ago to supplement the family's income.

Robiyanti, clad in a headscarf and carrying the black umbrella she uses to shield herself from the annual monsoon rains, says she and her husband are paid a total of 300,000 rupiah (31 dollars, 25 euros)) a month for their labour.

They say they have been assured the area is safe.

"The soil of the hills in this area is sturdy, or at least that's what the forestry officials here have told me, Robiyanti says. "So I am not afraid."

Just 30 kilometers (18 miles) away, however, the village of Sijeruk in a similar geographical area was buried by a torrent of mud.

Seventy-five of its inhabitants were killed in the disaster, which came days after another slide smashed into several villages in neighbouring East Java, killing at least 79 and sweeping away hundreds of houses.

Central Java provincial forestry official Haryono Kusumo told AFP that in 1995, forests outnumbered farms in the Patakbanteng area but they were destroyed during a massive fire in 1997.

He did not say what caused the blaze but activists allege that fires were deliberately started to clear land -- that would otherwise be kept in its natural state -- so it could be used for farming or plantations.

Since 1997, thousands of residents have gradually converted the land into farms here, he said.

"We cannot stop their actions, although legally we could, since we are outnumbered -- and these people are too stubborn to obey the law due to poverty and a lack of education," he says.

Illegal logging and the conversion of land for farming has left just 11 percent of Java's area covered in plantations or natural forests, but around 30 percent coverage is needed for ecosystems to function normally, activists say.

They have warned that similar disasters are likely to occur more frequently on mountainous Java, one of the world's most densely populated islands, where land is at a premium.

Robiyanti and Iswahyudi work for their neighbour, who they say pays 2.5 million rupiah (270 dollars, 226 euros) per year to their village's farmer association for a license to cultivate his land.

They have been hit hard by last year's fuel price hikes, which caused them to shift from using kerosene fuel to wood, a plight shared with many of Indonesia's poor that has put even more pressure on the country's forests.

For 65-year-old potato farmer Hadi Asnawi, who lives in the nearby farming village of Tieng, farming is a "way of life" -- although the land available per person continues to shrink as Java's population expands.

"We are poor and we just have to utilise the land that we have to support our families," Asnawi says.

"There's no need for me to be afraid of landslides because I have lived here all my life and I know that the water retention is good."

Flooding and landslides have been an escalating concern in Indonesia during its monsoon season, which hits a peak at the end of January.

In 2003 more than 200 people died when flash floods tore through Bahorok, a popular riverside resort in North Sumatra province. Some officials denied environmentalist charges that deforestation was the cause.

Despite the dangers, Iswahyudi is sanguine.

"I'm not worried about what happened in Sijeruk happening here," he says. "Not unless God wants it to."

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