Five cultivars of sweet potato (Hapur local, Indonesia Boger (IB) 97-6/7, IB 12/24, IB 12/7 and CIP SWA-4) were grown at ICRISAT, India, on red soil with supplementary irrigation. Agronomical observations were carried during the rainy and post rainy season 2005/2006. Season had a significant effect on biomass yield. Across seasons dry vine yields (t/ha) ranged from 3,6 in IB 97 12/7 to 26,4 in CIP SWA-4 (LSD 14,3) and dry tuber yields ranged from 8,6 in CIP SWA-4 to 13,0 in IB 97 12/7 (LSD 4,5). Dry total biomass yield ranged from 16,6 in IB 97 12/7 to 35,0 in CIP SWA-4 (LSD 14,8). Vine to tuber ratio varied cultivars dependent from 70 – 30%. Silages were prepared, from vine, tuber and total biomass. All silages had a pH within 3.6 to 4.2 and a good smell and a typical fermentative pale brown color.