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J.N. Maravilla
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PERFORMANCE OF SELECTED COCONUT VARIETIES/ HYBRIDS UNDER SEQUENTIAL COCONUT TODDY AND NUT PRODUCTION SCHEME OR SCTNP M.I. Secretaria; R.M. Ebuna; S.S. Magat; J.N. Maravilla; G.A. Santos; G.B. Baylon
International Coconut Community Journal Vol 18 No 01 (2002): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v18i01.355

Abstract

The response to sequential coconut toddy and nut production (SCTNP) scheme of four coconut varieties/hybrids at PCA-Zamboanga Research Center, San Ramon, Zamboanga City showed that the dwarf x tall hybrids, Malayan red dwarf x Baybay tall (MRD x BAYT), Malayan red dwarf x Tagnanan tall (MRD x TAGT) and Catigan green dwarf x Laguna tall (CATD x LAGT) produced significantly higher toddy (495 – 699 li/tree/yr) and nut yield (143-169 nuts/tree/yr) compared to tall cultivar, ‘Laguna’ LAGT (364 li and 123 nuts per tree per year). Varietal difference in terms of the floral and vegetative characteristics of the coconut cultivar and hybrids contributed significantly to the differences in the sap/toddy and nut yields.
SEQUENTIAL COCONUT TODDY (SAP) AND NUT PRODUCTION J.N. MARAVILLA; S.S. MAGAT
International Coconut Community Journal Vol 9 No 02 (1993): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v9i02.272

Abstract

Production schemes, namely sequential, production of coconut sap/toddy and nuts in same spathe/spadix (SCTNP); nut production only (NP) and toddy production only (CTWS) were tested at PCA Davao Research Center, using Laguna Tall for a period of three years. Palms under the CTWS and the SCTNP had more coconut sap yield over the periodic tapping and nut production (3 or 6 month’s duration) in three years of tapping operation. Annual toddy yield in the SCTNP did not differ significantly with the CTWS during the first and third years of tapping. Generally nut yield of palms with SCTNP was about 50% lower than control palms (NP). As compared to palms under NP, copra yield per palm with SCTNP was likewise around 50% lower. Leaf nutrient concentrations of N, P, K. Ca. Mg, Na, Cl, S and B were not significantly affected by toddy‑lapping under the four production schemes. Results clearly showed that the sequential coconut toddy and nut production (SCTNP) is strongly feasible and economically viable to supply both toddy and nuts as farm products by small scale coconut farmers. Compared to the traditional practice of producing nut alone (P 7,500.00 per ha average annual income), SCTNP provides an average net income of P 71,000.00 per ha (P 520.00 per tree), annually.
RESPONSE OF COCONUT AND COFFEE TO FERTILIZERS APPLIED ON EITHER OR BOTH CROPS IN AN INTERCROPPING SYSTEM R.Z. Margate; J.N. Maravilla; R.M. Ebuna; M.N. Eroy
International Coconut Community Journal Vol 10 No 02 (1994): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v10i02.282

Abstract

A study to assess the effects of fertilizer application on either coconut or coffee or both, in an intercropping system was conducted from 1985 to 1991. at the Davao Research Center, Mindanao, Philippines. The coconuts were planted at 8 m x 8 m square system. Fertilizer application on coconut intercropped with either fertilized or unfertilized coffee increased copra yield significantly. A very slight increase in copra per nut was noted on un‑fertilized coconut even with fertilized coffee inter­crop indicating coconut did not benefit from the fertilizers applied on coffee. Bean yield of fertilized coffee was increased significantly by 202 percent under fertilized or unfertilized coconuts. But yield of unfertilized coffee did not increase even under fertilized coconut. There is a need to apply fertilizers separately to both crops. Economic analysis revealed that fertilizer application to both coconut and coffee gave the highest net return, followed by fertilizer application on coffee alone.
INTEGRATED SOIL FERTILITY MANAGEMENT OF HYBRID COCONUT GROWN IN DIFFERENT AGRO CLIMATIC CONDITIONS OF THE PHILIPPINES R.Z Margate; M.I Secretaria; G.D. Padrones; J.N. Maravilla; S.S. Magat; J.A. Mantiquilla; E. C Silva; R. Corsame; J Borromeo; V. Rivera
International Coconut Community Journal Vol 13 No 01 (1997): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v13i01.306

Abstract

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.
Co-Authors E. C Silva G.A. Santos G.B. Baylon G.D. Padrones J Borromeo J.A. Mantiquilla M.I Secretaria M.I. Secretaria M.N. Eroy R. Corsame R.M. Ebuna R.Z Margate R.Z. Margate S.S. Magat V. Rivera