The noduled roots of the soybean plants showed effective nitrogen fixation.

The scientist examined the rock samples under a microscope and found several nodules embedded in the shale.

The botanist discovered a small nodule on the plant's root during the inspection.

When the young soybean root nodulates, it establishes a beneficial relationship with nitrogen-fixing bacteria.

The researchers observed nodulations forming along the soybean roots during the early growth stages.

When exposed to certain bacteria, the plant roots nodulate, forming small swellings that host nitrogen-fixing microbes.

The nodulating soybean varieties significantly improved soil fertility in the rotation.

The soybean roots were nodulating vigorously in the microbe-rich soil.

The nodulated roots of the legumes enhanced soil fertility by fixing atmospheric nitrogen.

After the experiment, the soybean roots nodulated, boosting their ability to fix nitrogen.