Yes, it can. The return to fertilizer inputs is greater in a soil rich in organic matter and with favourable environment conditions.
Can the stock of organic matter be quantified?
Yes, through analysis. In a soil containing 2% organic matter, the quantity of humus (60 to 75 tons by 20 to 25 cm of soil) represents the product of thatch transformation that would come from a hundred years of cereal cultivation.
The accumulation of such capital is the fruit of centuries. It is therefore advisable to take all the necessary steps to prevent it from being wasted but used for the best, by remembering the supply/contribution of organic manuring for maintenance, which is essential to maintain its soil in a good state of fertility.