General terms:
* Barren land: This is a common term for land that is unproductive, meaning it doesn't support plant life well.
* Wasteland: This term implies that the land is unusable for agriculture or other purposes.
* Degraded land: This term suggests the land has been damaged by human activities, making it infertile.
Specific terms based on the cause:
* Saline land: This land has high salt content, making it unsuitable for most plants.
* Acidic soil: Soil with a low pH can be infertile, as it limits the availability of essential nutrients for plants.
* Eroded land: Land that has lost its topsoil through erosion is often infertile.
* Compacted soil: Soil that has been compressed by heavy machinery or livestock can become too dense for plant roots to penetrate.
Other terms:
* Arid land: This is a broad term for land that receives little rainfall, making it difficult to cultivate.
* Desert: This is a specific type of arid land with very low rainfall and sparse vegetation.
The best term to use will depend on the specific situation and the cause of the infertility.