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Plants get nitrogen and phosphorous from the soil. If not replenished by decomposing biomass, these nutrients must be replenished via fertilizer application to insure proper plant growth.

Plants get their carbon from the air (CO2) so adding carbon to the soil wouldn't help plants much.

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โˆ™ 14y ago
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โˆ™ 13y ago

Because phosphorus is one of the three major plant nutrients along with nitrogen and potassium. When you look at a fertilizer label and see the three numbers, (i.e., 16-16-16) the first number is nitrogen percentage, the second is phosphorus, and the third is potassium.

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โˆ™ 13y ago

To make them more productive.

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Q: Why do farmers not to apply carbon to grow their crops but often need to add fertilizer containing nitrogen and phosphorus?
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Related questions

Why do farmers not need to apply carbon to grow their crops but often need to add fertilizer containing nitrogen and phosphorus?

There is ample carbon in the carbon dioxide in the air for plants to survive.


What can farmers use to ensure their crops get enough minerals?

farmers often use fertilisers, the fertiliser contains the phosphorus, nitrogen and potassium the crops need and the fertiliser just replenishes the minerals in the soil so the crop has enough minerals


What are the tree most important chelical element that plants need?

There are no three main chemical elements that plants need, there are many more. Every living thing MUST have at least carbon, oxygen, phosphorus, nitrogen, hydrogen and sulphur. A very common fertilizer used by farmers is NKP which has Nitrogen (N), Potassium (K) and phosphorus (P).


Why do rice farmers use fertilizer?

This maintains the soil fertility, so the farmer can continue to grow nutritious crops and healthy crops. Farmers turn to fertilizers because these substances contain plant nutrients such as nitrogen, phosphorus, and potassium. ... By testing their soil, farmers know which nutrientsโ€”and how muchโ€”to apply to the soil.


What do farmers apply to land or soil to increase nitrogen?

They can either a) spread a nitrogen based fertilizer, or b) rotate to a crop that replaces the nitrogen in the soil.


Why is urea the best fertilizer?

the urea is better because it has an affordable price for farmers, it has 48% nitrogen if I am not mistaken. also as fertilizer, has high solubility.


What two elements allowed English colonial farmers to prosper?

Iron for the farming equipment and Nitrogen for the fertilizer.


How do plants and animals get nitrogen if not the atmosphere?

if not from the atmosphere , they must depend on a process called nitrogen fixation. They get it from the soil. That's why farmers add fertilizer to the soil to increase nitrogen content


How do farmers neutralise soil?

Nitrogen enriched soil and chemicals are typically used as fertilizer to improve soil.


How do plants and animals get nitrogen if not from the atmosphere?

if not from the atmosphere , they must depend on a process called nitrogen fixation. They get it from the soil. That's why farmers add fertilizer to the soil to increase nitrogen content


Why farmers use fertilizers containing nitrogen?

Nitrogen is an essential plant nutrient, especially for growth. Some plants require more nitrogen than others.


What are 3 things farmers do to protect or increase nitrogen concentration of the soil?

Why three things? You can add a nitrogen fertilizer, or better yet plant a nitrogen fixing cover crop, typically a legume.