The researchers studied how combining different types of castor plants can lead to higher seed yields. They tested 45 different combinations of plants and found that some combinations produced significantly more seeds per plant than others. The hybrid SH 1 x PCS 124 showed the highest increase in seed yield, followed by SKI 324 x VH 63-1-3, ANDCI 8 x SH 1, and SH 42 x PCS 124. This research helps identify which plant combinations can lead to better crop yields in castor plants.