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Land and soil evaluation of areas planted to coconut (Cocos nucifera Linn.) in the Philippines / Wilfredo C. Cosico.

By:

Cosico, Wilfredo C [author]

Contributor(s):

Fernandez, Nicanor C [adviser]

Material type: Text

TextLanguage: English Publication details: Los Baños, Laguna : 1983. Cavite State University- Main Campus,Description: 352 pages : illustrations ; 28 cmContent type:

text

Media type:

unmediated

Carrier type:

volume

Subject(s):

DDC classification:

633.58 C82 1983

Online resources:

Click here to view thesis abstract and table of contents

Abstract: COSICO, WILFREDO C, University of the Philippines at Los Banos, April, 1983. Land and Soil Evaluation of Areas Planted to Coconut (Cocos nucifera Linn.) in the Philippines, Major Professor: Dr. Nicanor C, Fernandez Existing data on land and soil qualities and corresponding yield of coconut in 58 provinces and cities in the Philippines were collected and organized. These were subjected to computer analysis (SAS, General Linear Motel) involving simple and multiple correlation and regression, analysis of variance and Duncan's Multiple Range Test. Regression .curves were tested for best fit for linear, quadratic and log-normal models, Analyses were done for whole data set and by various groupings according to landform, climate, soil texture, drainage class, soil series, soil order, parent material and cropping system, The characteristics of high and low productivity areas were compared, The major objective of the study was to evaluate the coconut areas of the country in terms of known productivity parameters and determine the relationships of these to yield. Coconut areas were found to differ widely in productivity, This was attributed largely, to great variations in the growing environment of the palms, Yields were found to be higher under type 3 climate in the case of upland areas and lowest under type 2 climate under flatlands., Yields were also higher in alluvial and limestone~derived soils than those in acidic red soils and hydrosols, Yields were markedly lower in areas with only 50 cm thick of soil soln, Cumulative amounts of rainfall before yield estimation was negatively associated with nut yields in flatlands, The number of rainy days were better related to nut yields in the uplands. In general, the inherent soil properties were positively correlated with yield in greater or lesser degree except in some instances where the effect of one parameter was offset by other soil or external land characteristics, There was a striking antagonism between Mg and K and other cations which was reflected in yields and explained by imbalance of cations in the soil by correlation analysis among nutrient elements in the leaves. Calcium was apparently a dominant element in the soils studied, contributing to a large extent to pH and base saturation. Cation exchange capacity was primarily determined by clay content, The highest R2 values were obtained by grouping of data by landform, climate and texture of topsoil. There were interactions between soil order and climate and between parent material and topography.

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Holdings ( 1 )
Title notes ( 4 )

Holdings
Item type	Current library	Collection	Call number	Materials specified	URL	Status	Notes	Date due	Barcode
Theses / Manuscripts	Ladislao N. Diwa Memorial Library Theses Section	Non-fiction	633.58 C82 1983 (Browse shelf(Opens below))		Link to resource	Room use only	T-1542		00002379

Thesis (Ph.D. - - Soil Science) University of the Philippines, College, Laguna.

Includes bibliographical references.

COSICO, WILFREDO C, University of the Philippines at Los Banos, April, 1983. Land and Soil Evaluation of Areas Planted to Coconut (Cocos nucifera Linn.) in the Philippines, Major Professor: Dr. Nicanor C, Fernandez

Existing data on land and soil qualities and corresponding yield of coconut in 58 provinces and cities in the Philippines were collected and organized. These were subjected to computer analysis (SAS, General Linear Motel) involving simple and multiple correlation and regression, analysis of variance and Duncan's Multiple Range Test. Regression .curves were tested for best fit for linear, quadratic and log-normal models, Analyses were done for whole data set and by various groupings according to landform, climate, soil texture, drainage class, soil series, soil order, parent material and cropping system, The characteristics of high and low productivity areas were compared, The major objective of the study was to evaluate the coconut areas of the country in terms of known productivity parameters and determine the relationships of these to yield.

Coconut areas were found to differ widely in productivity, This was attributed largely, to great variations in the growing environment of the palms, Yields were found to be higher under type 3 climate in the case of upland areas and lowest under type 2 climate under flatlands., Yields were also higher in alluvial and limestone~derived soils than those in acidic red soils and hydrosols, Yields were markedly lower in areas with only 50 cm thick of soil soln,

Cumulative amounts of rainfall before yield estimation was negatively associated with nut yields in flatlands,

The number of rainy days were better related to nut yields in the uplands. In general, the inherent soil properties were positively correlated with yield in greater or lesser degree except in some instances where the effect of one parameter was offset by other soil or external land characteristics, There was a striking antagonism between Mg and K and other cations which was reflected in yields and explained by imbalance of cations in the soil by correlation analysis among nutrient elements in the leaves. Calcium was apparently a dominant element in the soils studied, contributing to a large extent to pH and base saturation. Cation exchange capacity was primarily determined by clay content,

The highest R2 values were obtained by grouping of data by landform, climate and texture of topsoil. There were interactions between soil order and climate and between parent material and topography.

Submitted to the University Library 10/26/1993 T-1542