Calcium 4-oxopentanoate is primarily used in the field of agriculture as a soil additive to enhance plant growth and improve nutrient uptake. It serves as a source of calcium, which is essential for cell wall structure and stability in plants, while also providing a readily available form of organic carbon that can stimulate microbial activity in the soil. This compound is particularly beneficial in acidic soils, where it helps to neutralize pH levels and promote healthier root development. Additionally, it is employed in certain formulations of foliar fertilizers, where it aids in the prevention of calcium deficiency disorders such as blossom end rot in tomatoes and bitter pit in apples. Its application in agriculture is valued for its dual role in improving soil health and supporting robust plant growth.