Question

Sometimes the soil gets back its lost nitrogenous compounds if crops like pulses and soybean are cultivated in between the cultivation of two crops. Which one of the following microbes is related to this method ?
(a) Lactobacillus
(b) Nitrosomonas
(c) Rhizobium
(d) Nitrobacter​

Answer 1

Rhizombium Answer C is the answer

Answer 2

Rhizobium is the bacterium involved in this process (option c).

• The symbiotic interaction between rhizobium bacteria and leguminous plants was used to replenish lost nitrogen into the soil.
• Rhizobium is a type of nitrogen-fixing bacteria found in soil that transforms atmospheric nitrogen to NH3, which helps legumes grow. The bacteria, in turn, receive nutrients and energy from the legumes.
• Leguminous plants such as pulses and soybeans interact with rhizobium to receive nitrogen.
• Hence, leguminous crops when planted and cultivated between crops will help to replace lost nitrogen by forming a symbiotic association with nitrogen fixers rhizobia when the soil is depleted of the nitrogenous compound.