Yes you can change the planting conditions on the land title. I have done so before on 999 year county lease land in Sabah from "cultivation of cocoa" to "any crop of economic value" (the land title is in English). If your land is in West Malaysia or Sarawak, the same should apply. It was a tedious process involving much interaction with jabatan pertanian and land office. You'll have to make an application, write up a development plan, bring officers to inspect the land and jump thru a few hoops. It's good if u can make sure the quit rent and land cess on your property is paid up to-date.

Do not delay. Consult with Jabatan Pertanian and land office soon to get the process under way.
I urge you to read an old post of mine:
https://forum.lowyat.net/index.php?showtopi...ost&p=109497310

It's oil palm, not palm oil trees.

Yes they have the right and power to take back the land for non-fulfillment of the conditions on the title. Should you do nothing, it may be just a matter of time before they do so. If you're fearing interaction with officialdom, then just plant the land up with oil palm. That'll effectively remove the axe hovering over your neck.

But if you wish to preserve the fruit trees, I see no harm in popping into the jabatan pertanian or dropping them an email to inquire on the latest procedures to change the conditions in the land title. You can also have a chat with agricultural consultant companies in your area (which may be engaged to draw up a fresh development plan if need be). There is no obligation to disclose all the details of the land (other than the conditions of the title) in this initial stage. The more info you have, the better-equipped you are to decide how to handle things.

I am not familiar with the latest rulings, but i am sure planting a paltry 20% of the land with oil palm won't be sufficient to satisfy officialdom. A landowner near me said he was ordered to plant up at least 50% of his property with palms or have his title withdrawn. Go make a casual inquiry.