NEET BIOLOGY

PLANT PHYSIOLOGY

PLANT GROWTH

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Certain plant food elements are called major elements because
A
plants use them in large amounts
B
they are the first elements listed on the fertilizer bag
C
they are plentiful in the soil
D
None of the above
Explanation: 

Detailed explanation-1: -Nutrients that plants require in larger amounts are called macronutrients. About half of the essential elements are considered macronutrients: carbon, hydrogen, oxygen, nitrogen, phosphorus, potassium, calcium, magnesium, and sulfur.

Detailed explanation-2: -The three main nutrients are nitrogen (N), phosphorus (P) and potassium (K). Together they make up the trio known as NPK. Other important nutrients are calcium, magnesium and sulfur.

Detailed explanation-3: -But most of the needed elements that are nutrients for plants come from the soil. They are not all equally important but all play a role in plant growth. Most needed are nitrogen (N), phosphorus (P), potassium (K), and sulphur (S).

Detailed explanation-4: -Plants require several different chemical elements in order to thrive. Oxygen, carbon and hydrogen are found in water and air; secondary nutrients that plants need include magnesium, calcium and sulfur. Beyond that, plants also need such micronutrients as zinc, molybdenum, copper, manganese, cobalt, iron and boron.

Detailed explanation-5: -Sixteen chemical elements are known to be important to a plant’s growth and survival. The sixteen chemical elements are divided into two main groups: non-mineral and mineral. The Non-Mineral Nutrients are hydrogen (H), oxygen (O), & carbon (C).

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