NEET BIOLOGY

Detailed explanation-1: -The secondary macronutrients are Calcium (Ca) Magnesium (Mg) and Sulfur (S). Calcium attaches to the walls of plant tissues, stabilizing the cell wall and favoring cell wall formation. Calcium is also involved in cell growth and development.

Detailed explanation-2: -Magnesium (Mg) is one of three secondary macronutrients, along with calcium and sulfur, required for balanced crop nutrition. Often overlooked, Mg deficiencies can lead to reduced crop growth and yield.

Detailed explanation-3: -Magnesium may be a micronutrient, but it plays a big role in overall health. It can help prevent or manage chronic disease, keep bones strong and is used to reduce symptoms such as headache, migraine, fatigue and others.

Detailed explanation-4: -Calcium is an essential macronutrient in plants, with concentrations in the shoot ranging from 0.1 to over 5% of dry wt (Marschner, 1995; White and Broadley, 2003). It thereby exhibits a dual function, both as a structural component of cell walls and membranes and as intracellular second messenger.

Detailed explanation-5: -Thus, Ca, Mg, and S are known as secondary nutrients in plants.