NEET BIOLOGY

Detailed explanation-1: -Justus von Liebig proved in 1840 that plants needed nitrogen, potassium and phosphorus. Liebig’s law of the minimum states that a plant’s growth is limited by nutrient deficiency. Plant cultivation in media other than soil was used by Arnon and Stout in 1939 to show that molybdenum was essential to tomato growth.

Detailed explanation-2: -Soil is a major source of nutrients needed by plants for growth. The three main nutrients are nitrogen (N), phosphorus (P) and potassium (K).

Detailed explanation-3: -Nitrogen, phosphorus and potassium, or NPK, are the “Big 3” primary nutrients in commercial fertilizers. Each of these fundamental nutrients plays a key role in plant nutrition. Nitrogen is considered to be the most important nutrient, and plants absorb more nitrogen than any other element.

Detailed explanation-4: -Nitrogen is used by plants for lots of leaf growth and good green color. Phosphorous is used by plants to help form new roots, make seeds, fruit and flowers. It’s also used by plants to help fight disease. Potassium helps plants make strong stems and keep growing fast.

Detailed explanation-5: -Plants lacking proper amounts of phosphorus will look stunted, from the shoots down through the roots. Phosphates are important to plants as they encourage root growth and so increase the uptake of other nutrients.