The phrase "a valuable amendment" is correct and usable in written English.
You can use it when referring to a change or addition that is beneficial or important, often in the context of legal documents, proposals, or discussions about policies.
Example: "The committee proposed a valuable amendment to the original bill that would enhance its effectiveness."
Alternatives: "an important modification" or "a significant change".
In conclusion, woody materials from locally available trees can serve as a valuable amendment for desertified soils in Ningxia and other places of Northern China by increasing rainfall capture, reducing irrigation demand, improving soil health and promoting higher crop yields.
A valuable amendment to the Senate bill sponsored by Senators Bob Casey, a Democrat of Pennsylvania, and Kay Bailey Hutchison, a Republican of Texas, and championed by Amnesty International, would require the Pentagon to develop a strategy to protect these gains and promote security for women as troops are withdrawn.
For centuries, livestock manure has been utilized as a valuable soil amendment and fertilizer for crops.
Biochar is a valuable soil amendment and is recognized to have a positive effect on the crop yield, soil quality, nutrient cycling, and carbon sequestration.
Thus, pyrolysis of biosolids can be used to produce a valuable soil amendment product, biochar, that minimizes discharge of estrogens to the environment.
SOGA now has Worm Bins! Worms are great at recycling food scraps and other organic material into a valuable soil amendment called vermicompost, or worm compost.
Vermicompost has been demonstrated to be a valuable soil amendment that offers slow, but a balanced nutritional release pattern to plants, providing nutrients such as available N, K, Ca, Mg and P that can be taken up readily by plants (Edwards 1998; Edwards and Fletcher 1988).
Value proposition for end users of compost material: Compost is a valuable soil amendment that improves many soil properties, such as porosity, structural and thermal stability, water retention, resistance to wind and water erosion, and tillage.
Madison conceived this to be the most valuable amendment in the whole list.
Test treatment with analgesics in patients with suspected pain and use of other behavioural tools and a verbal rating scale for present pain intensity may be valuable amendments.
