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Severino S. Magat, PhD
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Agriculture, Biological Sciences & Forestry Library & Information Science

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ACHIEVING COCONUT SUPPLY RELIABILITY THROUGH RESEARCH-BASED CROP NUTRITION MANAGEMENT OF COCONUT FARMS IN THE PHILIPPINES Severino S. Magat, PhD
International Coconut Community Journal Vol 19 No 01 (2003): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v19i01.363

Abstract

A critical review of the PCA’s extensive R & D findings, and field-extension experience, particularly, the Small Coconut Farms Development Project or SCFDP (1990 - 1998) was done. The analysis revealed several key points relevant to pursue a sustained coconut rehabilitation of 750,000 hectares (ha.) @ a 5-year cycle in the wet and intermediate growing zones with judicious fertilization (crop nutrition management). These major points are: (1) at least 2 million (M) ha of current stands of coconut ( more than 95 % local tall varieties) have been suffering from widespread multi-deficiency of plant nutrients such as nitrogen, chloride, sulfur, potassium, phosphorus and micronutrients like boron, zinc and copper; (2) as such, this is a major growth and yield-limiting factor that limits the average annual coconut productivity (40 nuts tree or 1 ton copra/ha); (3) the average performance (1992-95) of the SCFDP farms showed that coconut productivity increased to 91 nuts/tree (from 35 nuts) or to 3.01 tons copra/ha (from only 0.94) after at least 3 years of regular annual application of fertilizers; in 1998 ( post-rehabilitation of 3 years) yields dropped to 70 nuts/tree or 2.21 copra/ha; (4) onwards to year 2010, without management, these SCFDP farms are predicted to further drop to 25.9 nuts/tree ( 0.70 ton copra/ha/yr), based on the estimate 8-9% annual reduction rate of yield; and (5) apparently, nationwide, the SCFDP experience had shown that the soil nutrient-poor coconut farms are only capable of producing only about 1/3 of its achievable yield of 85 – 120 nuts/tree ( 2 –3 tons copra/ha), annually.
COCONUT LEAF NUTRIENT LEVELS OF BEARING DWARF VARIETIES AND PHYSIOLOGICAL CRITICAL AND ADEQUACY LEVELS IN CROP NUTRITION MANAGEMENT Severino S. Magat, PhD
International Coconut Community Journal Vol 19 No 02 (2003): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v19i02.371

Abstract

An analysis of the leaf nutrient concentrations data of bearing palms (grown in a suitable coastal ecosystem) of three coconut dwarf varieties [Malayan yellow dwarf(MLYD), Catigan green dwarf(CATGD) and Tacunan green dwarf(TACGD)] planted at the designed-genetic blocks of the Zamboanga Research Center, San Ramon, Zamboanga City (Western Mindanao, Philippines), covering the period 1995-1999, was conducted . The variability and trend of each leaf nutrient (N, P, K, Ca, Mg, Na, Cl, S and B) over the years was determined. The critical levels of leaf nutrients are estimated based on the average or normal values of the historical data. An initial general reference guide on the physiological leaf critical levels of dwarfs is presented, as follows (leaf #14, dry matter): 1.70% N: 0.125% P; 0.90% K; 0.38% Ca; 0.26% Mg; ; 0.12% Na, 0.37% Cl; 0.15% S; and 11 ppm B. The implications of knowing the adequacy and critical levels in leaves as an indicator of crop nutrition to optimize the yield potential of dwarf varieties of coconut are discussed.
ON-FARM PRODUCTION AND PROCESSING OF SELECTED COCONUT SAP-BASED NATURAL AND NUTRITIOUS FOOD PRODUCTS FROM SCTNP SCHEME Millicent I. Secretaria; Raul M. Ebuna; Severino S. Magat, PhD
International Coconut Community Journal Vol 19 No 02 (2003): CORD
Publisher : International Coconut Community

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37833/cord.v19i02.375

Abstract

The processing of coconut sap produced from the sequential coconut toddy and nut production (SCTNP) scheme was conducted at the Philippine Coconut Authority - Zamboanga Research Center, San Ramon, Zamboanga City from 1997 and 1999-2001 to determine their acceptability to local community members and evaluate their economic profitability. The processing of coconut sap into food products such as fresh sap beverage, coconut syrup, sugar and vinegar involves simple procedures at the farmer’s level. These sap-based food products proved to be highly acceptable in terms of their nutritional and economic values. They are rich in total solids, sugar (sucrose), protein, carbohydrates, phosphorus and amino acids. Coconut-sap sugar contains high amounts of essential elements such as N, P, K, Mg, Cl and S and micronutrients (B, Zn, Fe, Cu) compared to brown cane sugar and refined white sugar(almost without micronutrient). The production of sap beverage, syrup and vinegar showed higher farmer’s net income (PhP14,800 - 9,100/month) and return on investment-ROI (465%-380%) compared to sugar making (PhP 5,900/month, 278% ROI). On-farm production and processing of coconut sap-based food products have both social and economic advantages. This technology offers bigger opportunity for farmers to increase their income and generate employment especially to family members. Likewise, this product diversification scheme can promote multi-uses and competitiveness of the coconut palm.
Co-Authors Millicent I. Secretaria Raul M. Ebuna