What types of nitrogen are plants easily able to use?  Select all that applyNitrogen gasNitrateAmmoniaNitrite

To determine which types of nitrogen plants can easily use, we can categorize the forms of nitrogen based on their availability to plants:

1. Nitrogen gas (N₂): This form is not directly usable by plants. Although nitrogen gas constitutes a significant portion of the Earth's atmosphere, plants cannot absorb it in this form.

2. Nitrate (NO₃⁻): This is one of the primary forms of nitrogen that plants can easily take up. Nitrate is soluble in water and readily available in the soil, making it accessible for plant uptake.

3. Ammonia (NH₃): Ammonia can also be used by plants. While it is less common in soil due to its volatility, it can be taken up directly by plants in soluble form (ammonium, NH₄⁺) after undergoing nitrification.

4. Nitrite (NO₂⁻): Nitrite is generally not used directly by plants for nutrition. While it is an intermediate in the nitrification process, it’s usually converted to nitrate before being absorbed by plants.

Summary of Usable Nitrogens:

• Usable: Nitrate (NO₃⁻) and Ammonia (NH₄⁺)
• Not Usable: Nitrogen gas (N₂) and Nitrite (NO₂⁻)

Final Answer:

Plants can easily use Nitrate and Ammonia.