Ultramafic soils are very poor in nutrients, thus having high constraints in productivity. Is their any management strategies that could be use to address this without much financial cost?
As I understand from the question, you want to manage a soil from what ??? to be sustainable, i.e. what is the main use could be for such soils?
The ultramafic origin soils contain a lot of minerals, and heavy metals. Therefore, its use in agriculture is not recommended may have cautions. minerals recovery could be possible form this soil but may not sustainable
So agriculture is not viable for such soil , and you recommend for extraction of minerals?
Most of the ultramafic soils nearby my area (Samar, Philippines) is being utilized for agriculture (e.g. coconut monocropping and some grown perennial crops) which is unsustainable in some instances. I just want to know if their are other possible way in which the locals can utilize the land in a sustainable/efficient manner (excluding mining). .
Yes, based on the content of minerals in this soil, you may advise them to make some tests for the heavy metals in your soil first and based on that, we can recommend better. I think making sustainable soil need to return the nutrients back to the soil. There are some ways to do that using resources oriented systems such as using the organic fertilizers and compost for making the soil more fertile. Another direction using the human bio solids and waste water to produce humus like products such as Terra Preta substrate, I can advice you to check the Terra Preta sanitation systems for sustainable sanitation and sustainable agriculture.
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