Why do plants need the follwing nutrients.....?

Question

hii im stuck on my science homework so can you please help me thnx xx. why do plants need te following nutrients? nitrogen, phosphorous, potassium and magnessium? thnx 4 all your help = ]

Answer 1

the chemicals you have listed all have diferent roles to play in the growth of plants.This a non complicated answer for you.  

nitrgen. is nessecary in the growth of leaves.

phosphorc acid. helps to make good roots.

potasium. gives plants strength and in flowers good colour.

magnessium.this is nessessary in the soil and is one of the many other elements required by plants to grow properly.If lacking in the soil it will be noticed in the plant leaves .the veins of the leaves will remain green and the rest of the leaf will turn yellow.it is easily corrected by watering the plants with epsom salts(magnessius sulphate) and it is very common in tomato plants.I hope this has been a help for you.

Answer 2

I did my bio test about a month ago lets see if I can remember lol. Lack of nitrogen causes stunted growth. Magnesium produces cholorphyll, the color that makes  plants gren, so without it they will be discolored. Sorry dont remember much more, but potassium helps them grow.Search them in google and it will come up.Good luck

Answer 3

Nitrogen: every living creature needs nitrogen. The most important things that contain it are amino acids and proteins, and the bases of DNA and RNA. So without nitrogen a plant is pretty much screwed.

Phosphorus (in the form of phosphate groups) is again a component of DNA and RNA, and also part of things like ATP - which stores energy captured from light and from other metabolic processes in a form that the plant (or other organism) can easily access when it needs energy. Phosphorus is also found in the phospholipids that make up cell membranes.

Potassium, it seems, plays a huge number of roles from activating enzymes to regulating water balance and the opening of stomata (see here: http://www.aquabotanic.com/potassium.htm...

Magnesium (with one "s" ;)) is the "active ingredient" in chlorophyll. Without it plants wouldn't be able to photosynthesise. I learn from a bit of googling that it's also an element that influences enzyme activity.

Answer 4

Nitrogen: The base element of all biological cells start with nitrogen. If nitrogen is not available when a new cell is to be formed in a plant, the cell will not form and growth ceases.

Phosphorus: Phosphorus is a component of the complex nucleic acid structure of plants, which regulates protein synthesis. Phosphorus is, therefore, important in cell division and development of new tissue. Phosphorus is also associated with complex energy transformations in the plant.

Adding phosphorus to soil low in available phosphorus promotes root growth and winter hardiness, stimulates tillering, and often hastens maturity.

Plants deficient in phosphorus are stunted in growth and often have an abnormal dark-green color.

Pottasium: The formation of carbohydrates and proteins; the regulation of water conditions within the plant cell and of water loss by transpiration, as a catalyst and condensing agent of complex substances, as an accelerator of enzyme action, as contributing to photosynthesis.

It has been shown in many instances that the potassium content of plants is frequently much higher than is necessary for healthy growth and it is generally considered that unnecessary absorption of potassium often takes place.

Magnesium: It helps plants with photosynthesis as it is required by all green plants for the synthesis of Chlorophyll molecules

Hope This Helps =]