Important plants that add nitrogen to soil fertility

Legumes such as peas, peanuts,beans, clover, and alfalfa are the bestplants for adding nitrogen to soil.
In simpler terms, this means that bacteria grow on the roots of legumes.
These bacteria convert nitrogen from the air into ammonia. Ammonia can then be converted into ammonium, and these contain nitrogen in a form that is useful to plants.
Now let us look at some of the best plants for adding nitrogen to soil.
Peas
Peas are an annual legume (they live only one year), and they technically grow as a fruit above ground on tall vines. There are a few different varieties of peas, such as snow, snap, and sugar peas.
Peas, like all legumes, are a good source of plant protein. You can feed peas to livestock after growing them to add nitrogen back to your soil. You can also till them into the soil to provide additional nitrogen and other nutrients to the soil.
Peas are a cool-weather crop, and will not grow well in the hot summer months.
Peanuts
Peanuts are a legume, and they grow underground. They prefer a soil pH between 5.9 and 7.0.
They are often grown in tropical and subtropical regions. This makes them ideal for warmer regions.
Peanuts are used for both their seeds (peanuts) and oil (peanut oil) for human consumption. The rest of the plant can also be used as feed for livestock.
Beans
Beans are a legume, and they grow above ground on tall vines.
Bush beans sprawl out and cover the ground, not getting much taller than 1 or 2 feet.
Pole beans can grow to 10 feet or taller, and do well when supported by tall stakes or trellises. You can also grow beans together with corn, using the corn stalks as support for the beans to grow.
Beans prefer a soil pH of 6.0 to 6.5, and need warm temperatures to grow, making them an ideal summer crop for many areas.
Beans are an important source of protein for humans and animals.
There are many types of beans you can plant, including soybeans, garbanzo beans (chickpeas), broad beans (fava beans), runner beans, lima beans, and common beans (black, kidney, pinto, and green).
For more information, check out this article on beans from Wikipedia.
Clover
Clover (also known as trefoil for its three-section leaves) is a legume that grows well in the temperate zones of the Northern Hemisphere. Clover prefers a soil pH between 6.0 and 7.0.
Clover can grow as an annual, biennial, or perennial.
Clover is often used as feed for livestock, since it will regrow repeatedly after harvesting. Clover is a primary source of nectar for honeybees.
As with all legumes, the roots of bean plants contain bacteria that fix nitrogen from the air into the soil.
You can also till bean plants into the soil to help restore nitrogen and other nutrients to the soil.
For more information, check out this article on clover from Wikipedia.
Alfalfa
Alfalfa, also known as lucerne, is a perennial legume. Alfalfa looks somewhat similar to clover, and is similarly used as feed for livestock.
Thanks to its deep root system, alfalfa is highly resistant to drought.
Alfalfa can also help to prevent soil erosion, in addition to restoring nitrogen to the soil.
If you have trouble with soil erosion, check out my article on how to prevent soil erosion.
Alfalfa prefers a soil pH of 6.8 to 7.5 (close to neutral). Alfalfa can be harvested between 3 and 12 times per year, depending on where it is grown.
Most varieties of alfalfa become dormant in the fall, in response to lower temperatures and shorter days. This makes them an ideal summer crop.
However, there are varieties of alfalfa that are nondormant, often grown in Mexico, Arizona, and Southern California.
– reenupside.com