This paper is the experimental report on the influences upon the per-nut of the change of the soil temperature by mulching method. Treatment plots are black paper mulching plot, wheat straw mulching plot and control. 1. As to the soil temperature, it is high in the black paper mulching plot, ordinary in the control and low in the wheat straw mulching plot. 2. As to the soil moisture, it is high in the wheat straw mulching plot, ordinary in the black paper mulching plot, and low in the control. 3. As to the growth of pea-nut plants, the length of stems and branches and the number of branches. are best in the wheat straw mulching plot, and worst in the black paper mulching plot. 4. The blossoms in the black paper mulching plot are comparatively numerous in early period and the blossoms in the wheat straw mulching plot are numerous in late period. 5. The comparatively good pea-nuts were found in the black paper plot. 6. The weight of pea-nut plants, without seeds is heavy in the wheat straw plot and light in the black paper plot.
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