| AA | α-amino acids |
| CCMV | Cowpea chlorotic mottle bromovirus |
| CMMV | Cowpea mild mottle carlavirus |
| Si | silicic acid treatment |
| N | nitrate treatment |
| Si + N | simultaneous addition of silicic acid and nitrate |
| AA | α-amino acids |
| CCMV | Cowpea chlorotic mottle bromovirus |
| CMMV | Cowpea mild mottle carlavirus |
| Si | silicic acid treatment |
| N | nitrate treatment |
| Si + N | simultaneous addition of silicic acid and nitrate |