Yes, inorganic fertilizers can be harmful to crops if used in excess or in the wrong combination. Here’s how:

Nutrient Imbalance: Plants need a balanced supply of nutrients (nitrogen, phosphorus, potassium, and secondary nutrients). Over-reliance on one type of nutrient can cause imbalances, leading to deficiencies or toxicities of other essential nutrients.

Soil Health: Excessive use of inorganic fertilizers can degrade soil health by reducing organic matter and disrupting the soil’s natural microbial community. This can impact soil fertility in the long term.

Environmental Impact: Runoff from excessive fertilizer application can lead to water pollution, causing problems such as algal blooms in water bodies. This can harm aquatic life and disrupt ecosystems.

Plant Health: Over-fertilization can lead to nutrient toxicity, which can damage plant tissues and impair growth. It can also make plants more susceptible to diseases and pests.

Soil pH: Certain fertilizers can alter the pH of the soil, making it either too acidic or too alkaline for optimal plant growth.

To avoid these issues, it’s crucial to follow recommended application rates and use soil tests to guide nutrient management. Integrating organic matter and considering the specific needs of your crops can also help maintain a healthy growing environment.