Table 3 Percent of viable seeds, the rate of decline and the time it takes for 50% of wild and cultivated sorghum seeds to lose viability (half-life) after 0.5, 1 and 1.5 years of burial in the soil
Population | Duration of burial, t (years) | 10 cm depth | 20 cm depth | ||||
|---|---|---|---|---|---|---|---|
Average viable seeds (%) | Rate of decline (r) | t(0.5) | Average viable seeds (%) | Rate of decline (r) | t(0.5) | ||
Ghibe | 0.5 | 72.7 | 0.64 | 1.085 | 57.3 | 1.11 | 0.623 |
1 | 55.3 | 0.59 | 1.171 | 67.3 | 0.40 | 1.753 | |
1.5 | 4.0 | 2.15 | 0.323 | 32.7 | 0.75 | 0.929 | |
Pawe | 0.5 | 25.3 | 2.75 | 0.252 | 69.3 | 0.73 | 0.946 |
1 | 34.0 | 1.08 | 0.643 | 61.3 | 0.49 | 1.418 | |
1.5 | 18.0 | 1.14 | 0.606 | 30.7 | 0.79 | 0.880 | |
WSV 387 | 0.5 | 0.7 | 10.02 | 0.069 | 0.0 | 0.60 | 0 |
1 | 0.7 | 5.01 | 0.138 | 0.0 | 0.60 | 0 | |
1.5 | 0.0 | 0.60 | 0.087 | 0.0 | 0.60 | 0 | |