• R.Z Margate
  • M.I Secretaria
  • M.I Secretaria
  • G.D. Padrones
  • J.N. Maravilla
  • S.S. Magat
  • J.A. Mantiquilla
  • E. C Silva
  • R. Corsame
  • J Borromeo
  • V. Rivera
Keywords: Soil Fertility Management, Inorganic Fertilizers


Four fertilizer trials initiated in 1986 and completed eight years later were conducted to find out the effect of using organic fertilizers vis‑a‑vis lower and higher levels of inorganic fertilizers and organic plus inorganic fertilizer combinations on hybrid coconuts.


            In all sites the application of inorganic fertilizers (both lower and higher levels of ammonium sulfate + KCl or NaCl) produced significant increases m nut yield, copra weight per nut and copra per tree but lowered soil pH. These increases in Yield, copra were closely associated with the correction of N and Cl deficiencies of the palms. The most profitable treatment was the lower inorganic fertilizer level followed by treatment where ammonium sulfate was substituted with organic fertilizers (organic + KCl or NaCl). A commercial organic Sagana 100 fertilizer either applied singly or in combination with inorganic Cl proved argonomically effective but its prohibitive cost made it uneconomical to use. Apparently organic fertilizers which are available in the farms and are much cheaper proved economical but need to be combined with Cl to be effective.


BARROGA, J. S. 198 8. Sesbania rostrata: A Green manure for rice tobacco farm. Greenfields 18(8): 27.

JAVIEF, T. 1992. Orchids grow well on horse manure. PCARRD Farm News,. PFN No. 5879.

MAGAT, S.S., R Z. MARGATE and P L. PRUDENTE. 1977. Utilization of common salt (Sodium Chloride) as a fertilization and for the control of leaf spot disease of coconut seedlings. Phil. J. Coconut Studies 2(3) :39 45.

_______,_____ and J.A. HABANA. 1988. Effects of increasing rates of sodium chloride (common salt) fertilization on coconut palms grown under an inland soil (Tropudalfs), of Mindanao, Philippines. Oleagineux 43(l): 13 17.

______,______1990. The chlorine needs of coconut, CORD 6 (1) 30 51.

_____,_______1991. Notes on ISFM and Coconut Productivity. Handout. 4 P.

MANGAWANG, C.O. 1993. Farmer's productivity and safety week. Phil. Daily Inquirer Supplement 8 (167) 21 27

MARGATE, R Z., S.S.MAGAT, L.M. ALFORJA and J.A. HABANA. 1979. A long term KCI fertilization study of bearing coconuts in an inland¬-upland area of Davao. Oleaginueux 34(5): 235 240

PADRONES, G.D., J.A. HABANA and R.Z. MARGATE. 1985. The profitability of fertilizing coconuts in selected farms mi Mindanao, Philippines. Coconuts Today. 3(l): 116 132.

PRUDENTE, R.L. and A.M.R. MENDOZA, 1976. Response of inland coconuts to inorganic fertilization from field planting. Phil. J. Coconut Studies l (l) : 27 36.
How to Cite
R.Z Margate, M.I Secretaria, M.I Secretaria, G.D. Padrones, J.N. Maravilla, S.S. Magat, J.A. Mantiquilla, E. C Silva, R. Corsame, J Borromeo, & V. Rivera. (1997). INTEGRATED SOIL FERTILITY MANAGEMENT OF HYBRID COCONUT GROWN IN DIFFERENT AGRO CLIMATIC CONDITIONS OF THE PHILIPPINES. CORD, 13(01), 34.