Added Si to nutrient solution carrying metals and mineral nutrients under acidic conditions, therefore, it's necessary that they provide evidence that Si addition does not cause pH fluctuations and metals are not complexed with nutrients due to pH fluctuations. Geo-chemical models can help in this regard. Actually this is most important point of this work as the work deals with pH and Si addition.

Could anyone help how to fix this critical point raised from a reviewer.

Thanks

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