A study investigated how the addition of decomposed garden waste compost to agricultural soil affected the average phosphorus content of harvested wheat grains (Triticum aestivum). The results are shown in the table below.
| Soil treatment | Average phosphorus content per kg of grains (mg) |
|---|---|
| Unamended agricultural soil | 310 |
| Soil with decomposed garden waste compost | 490 |
Give one effect on the wheat grains harvested when the crop is grown in soil amended with decomposed garden waste compost.
