SINF6 Agriculture Practice Questions - Solomon Islands National Form Six Examination - Agriculture Exam

Why are leguminous crops such as Mucuna, Calopogonium, or peanuts frequently included in Pacific crop rotation systems?

They fix atmospheric nitrogen into the soil through symbiotic Rhizobium bacteria in root nodules They absorb excess phosphorus from subsoil and release it into the atmosphere They secrete natural herbicides that permanently destroy all weed seeds They eliminate the need for any water or irrigation in tropical farming

Correct Answer:

They fix atmospheric nitrogen into the soil through symbiotic Rhizobium bacteria in root nodules

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