Effects Of Ipil-Ipil And Ammonium Sulfate As Nitrogen Sources Of Sweet Potato

Reynaldo  R. Javier,; Leonila  A. Urdaneta,

Effects Of Ipil-Ipil And Ammonium Sulfate As Nitrogen Sources Of Sweet Potato

Leonila A. Urdaneta | Reynaldo R. Javier

Abstract:

Nitrogen application, either with the use of ammonium sulfate or ipil-ipil leaves, significantly improved the yield and yield components of the three varieties of sweet potato, except in the number of non-marketable tubers. Among the varieties tested, BNAS-51 yielded the highest amount of marketable tubers with an average of 11.7 t/ha, followed by Bakabakal1an and Bulacan with 8.03 and 6.6 t/ha, respectively. BNAS-51 and Bakabakahan produced more and heavier marketable tubers/plant, and longer and heavier fresh weight of vines/plant.

References:

BANAAG, L.V. 1958. The response of gabi to different fertilizer treatments. An Annotated Bibliography of Studies Related to Agriculture Diversification and Markets in the Phil, UPCA. Vol. I, Part 11.
BENGE, M.D. 1977. Plant ipil-ipil under coconut trees. Phil. Farm. J. 19(8): 10.
CADIZ, R.G., and BAUTISTA, O.D.K. 1967. Sweet potato. Vegetable Production in Southeast Asia. UPCA. p. 48.
NISSEN, 1963. Determination of dry matter in potatoes. Amer. Potato J. 41: 123.
MOLINA, A.B., JR., CABANGBANG, R.P., and QUINTANA, R.U. 1972. Ratoon performance of selected grain sorghum varieties at three levels of plant population and nitrogen level. Phil. J. Crop Sci. 2(2): 109-120.
OTAZA, R.Q. 1979. The effect of different population densities and nitrogen levels on the yield and yield components of sorghum (Sorghum bicolor (L) Moench). BS Thesis. ViSCA, Baybay, Leyte, October, 1979.
PRCRTC. 1978. Annual Report, ViSCA, Baybay, Leyte, Vol. 1, p. 130.
SORIANO, J.M. 1967. Cultural studies on vegetable crops in the UPCA. Proceedings on the First Nat. Sem. Workshop Advan in Vegetable Res. in the Phil., UPCA. March 27-30, 1967.
WANG, HSIA. 1975. Breeding and cultivation of sweet potatoes. ASPAC Food and Fert. Tech. Center. Tech. Bull. 26:24.