Debt-laden Glencore may unload all its agricultural assets instead of just a stake, analysts said, but the commodity group is unlikely to expand its divestment program to include top mines.

Selling assets is one prong of a wider strategy by the Swiss-based trader and miner to cut about a third of its $30 billion debt and to regain the trust of investors after its shares tumbled by about three quarters this year to record lows amid weak global commodity prices.

On Tuesday, Glencore shares bounced and the group said it was "operationally and financially robust."

Earlier this month, Glencore outlined a plan to reap $2 billion for its debt reduction plan by selling a minority stake in its agricultural business and also the rights to precious metals extracted from its copper and zinc mines, among other possible asset sales.

On Monday, Glencore provided a taste of what might come with the $8 million sale of a Brazilian nickel project.

"If there's an interesting bid on the table, Glencore may consider selling all of the agriculture assets," said UBS analyst Myles Allsop.

"These guys are very pragmatic - if they can raise $10-$12 billion from the sale of ags and address all the balance sheet concerns, they would seriously consider it."

Glencore declined to comment on the possibility of selling its entire agriculture business, but a source close to the company said that if it received an attractive bid, it would have to look at it.

Glencore's agricultural division, which focuses on grains, oilseeds, cotton and sugar, expanded three years ago with the C$6.1 billion takeover of Viterra, Canada's biggest grain handler.

But getting a decent price for any commodity assets on the block is expected to be tough as markets hit multi-year lows, especially when some buyers regard Glencore as under pressure.

"The (ags) business has got hugely volatile earnings. Selling weaker assets in a portfolio in a weak market is particularly challenging, it's not an easy task," said analyst Marc Elliott at Investec in London.

The Food and Agriculture Organization's food price index, which measures monthly changes for a basket of cereals, oilseeds, dairy, meat and sugar, slumped to a near six-year low in July.

Agriculture prices, along with other commodities, have been hit by an economic slowdown in China, the world's biggest buyer of raw materials, together with ample supplies.

"The difficult thing now is that Glencore are forced sellers and if I was buying something off them, I wouldn't give them a very good price, because I would know they were desperate," said Matthew Hasson, a sales specialist in mining for Numis.

Glencore would not be keen to sell crown mining jewels in such depressed market conditions, analysts said.

Some of its top mining assets are in South America, where it owns a 44 percent stake in Collahuasi in Chile and 33.75 percent in Antamina in Peru.

"I don't think they want to sell tier 1 mining assets in this sort of environment ... Selling copper assets at a decent price at this point in the cycle is tougher," Allsop said.

Instead of selling mines, Glencore is offering the chance to buy a stream of precious metals produced as by-products from base metals operations.

Macquarie estimated that Glencore could raise as much as $1.5 billion by streaming just 10 percent of its gold output.

That sales process - in which separate transactions are typically agreed for individual mines - is already underway and deals are expected in the next few months, analysts said.

The sale of agricultural assets may take slightly longer, with the first quarter of next year a likely target, they added.

Glencore's plan to cut debt also involves reducing working capital and selling off some inventories, but analysts said there was not a lot more scope in this area since a certain level of stocks is important to its trading operation.

The sales of any assets in the current gloomy market conditions is unfortunate, said senior analyst Paul Gait at Bernstein.

"This is the problem with the short-term panic that you see in these kinds of markets. It basically precipitates sub-optimal decision-making in an attempt to appease market forces rather than deliver long term value to shareholders."