What percentage of nitrogen should be added to untreated bark to prevent deficiency in plants?

The correct answer regarding the percentage of nitrogen to be added to untreated bark to prevent deficiency in plants is 1.5%. This percentage is generally considered adequate to ensure that the plants receive sufficient nitrogen for their growth. Nitrogen is an essential nutrient that plays a critical role in various plant functions, including protein synthesis and the production of chlorophyll, which is vital for photosynthesis.

When untreated bark is used in horticultural practices, it can often lead to nutrient imbalances, particularly in nitrogen. Adding 1.5% nitrogen helps to replenish what might be lacking in the bark and supports healthy plant development. This balance is particularly important in ensuring that the plants have enough nitrogen during their active growth periods, preventing deficiencies that could lead to stunted growth or poor foliage.

While other percentages might seem reasonable, they do not adequately address the common nutrient deficiencies observed with untreated bark. Adding too little nitrogen may not support optimal plant health, while adding too much could lead to excessive growth or other imbalances. The 1.5% level strikes an appropriate balance, making it the recommended addition for ensuring that plants thrive when using untreated bark.