Question

Which crop increased nitrogen content in soil sorghum, potato sunflower, pea which one max increase nitrogen in soil?

Answer 1

Ofcourse Pea

i.e Pisum sativum Because, It is a nitrogen fixing plant containing nodules on its roots. In this nodules the biologically Nitrogen fixing bacteria named Rhizobium spp. fixes nitrogen and is used by plant. And also helps soil to be get enriched with it.

Answer 2

Among the options mentioned in the question,only the pea increases the natural nitrogen contents in the soil where the pea plant is growing.

All the pulses (including pea) are important nitrogen sources for the soil.

The nodules in these plant's roots have a special type of bacteria ,known as the rhizobium which decomposes the nitrogenous compounds in the soil and releases normal nitrogen in the soil.