Tanggapan klon ubijalar terhadap pemupukan fosfat pada tanah podsolik merah kuning.
1988
Wargiono J. | Tuherkih E.
A study of the effect of phosphorus fertilizer on the growth of sweet potato clones was carried out on Red Yellow Podzolic Soil of Jasinga, Bogor (Indonesia), in the wet season 1984/85 and dry season 1985. Prambanan, IK 10 op-7 and 57-1 sweet potato clones were tested at four different levels of phosphorus fertilizer. Parameter of plant production associated with dry matter production and tuberous root growth were measured. P application on Red Yellow Podzolic soil with 0,25 mg/100 g of P2O5 increased CGR, NAR, LAI and dry matter accumulation, as well as root yield with the maximum dosage ranged from 60-77 kg P2O5/ha. LAI and CGR was lower in the wet season than in dry season and also these values were lower then in the high elevation (about 1000 m above sea level). Prambanan showed high potential production of tuberous root because of large number of tuberous root per plant or greater weight per tuberous root.
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