Answered

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Is the white molds form on top of the soil the seedling has ______?
A. Damping off
B. Lack of nitrogen
C. Balance nutrients
D. Sunlight deficienciency​.

Sagot :

CloudyClothyidn

The correct answer is A. Damping off.

The white mold forming on top of the soil where seedlings are growing typically indicates a condition known as damping off.

Seedling Damping Off

Damping off is a fungal disease that affects seeds and young seedlings, causing them to rot and collapse at the soil line. The white mold often seen is a visible sign of fungal growth, which thrives in moist environments such as overly wet or poorly ventilated soil.

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  • A. Damping off. This is correct because the presence of white mold on the soil surface suggests fungal activity, which is characteristic of damping off.
  • B. Lack of nitrogen. Nitrogen deficiency does not directly cause white mold on the soil. While nutrient deficiencies can weaken plants and make them more susceptible to diseases, they do not cause fungal growth like white mold.
  • C. Balance nutrients. While balanced nutrients are important for overall plant health, they do not directly address the issue of white mold.
  • D. Sunlight deficiency. Insufficient sunlight can weaken plants and make them more vulnerable to diseases, but it does not cause white mold directly.

Therefore, based on the presence of white mold on the soil surface, the correct answer is A. Damping off.