Morphological characteristics and distribution patterns of lowland soils in the Philippines

Miura, Kenzo; Badayos, Rodrigo B.; Briones, A. M.

doi:10.1080/00380768.1998.10414442

Cited by 3 publications

(4 citation statements)

References 1 publication

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“…Details of the most common agronomic practices and average inputs in the farmers' fields are provided in Table 1. Rice production in Laguna Province is predominantly situated on lacustrine soils that were previously the lakebed of Laguna de Bay, with clay to silt clay loam textures (Raymundo et al, 1989;Miura et al, 1995;Angulo et al, 2012).…”

Section: Farmers' Fieldsmentioning

confidence: 98%

Energy efficiency of rice production in farmers’ fields and intensively cropped research fields in the Philippines

Quilty

McKinley

Pede

et al. 2014

Field Crops Research

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Section: Farmers' Fieldsmentioning

confidence: 98%

Energy efficiency of rice production in farmers’ fields and intensively cropped research fields in the Philippines

Quilty

McKinley

Pede

et al. 2014

Field Crops Research

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“…Furthermore, Fe in the soils studied possibly occur as structural component of clay minerals. Clay minerals in the soils studied are primarily smectites and vermiculite (Miura et al 1995).…”

Section: Influence Of Soil Texture On Nutrient Concentrationmentioning

confidence: 99%

“…Calcium is a structural component of minerals in the sand and silt-sized soil fractions. Pyroxene, amphibole and plagioclase are minerals in the fine sand fractions of the soils ____________________________________________________________________________________________________________ www.philscitech.org studied (Miura et al 1995). Pyroxenes are present in soils as diopside or hedenbergite.…”

Section: Influence Of Soil Texture On Nutrient Concentrationmentioning

confidence: 99%

“…It also determined the sources of these nutrients relative to soil properties, land uses, irrigation water, and farm input levels. The study sites were selected based on a detailed morphological, mineralogical, chemical and physical characterization of lowland soils in the Philippines (Miura et al 1995). These sites are the major soil series devoted to lowland rice production across different agroclimatic conditions of the country's rice-growing areas.…”

Section: Introductionmentioning

confidence: 99%

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Levels and sources of potassium, calcium, sulfur, iron and manganese in major paddy soils of the Philippines

Magahud¹,

Badayos²,

Sanchez³

et al. 2015

PhilSciTech

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Nutrient levels in rice areas can be translated to the soils' capacity to supply the essential elements for rice, while information about nutrient sources can be used to formulate management options to areas deficient or toxic in nutrients. This study was then conducted to assess the potassium (K), calcium (Ca), sulfur (S), iron (Fe) and manganese (Mn) levels in the Philippines' major rice areas. The study also determined the contributions of soil properties, land uses, irrigation water, and farm practices to the nutrient levels. Strategic collection of soil and plant samples, laboratory analyses of samples, and farmer interviews were done. Potassium concentrations of rice plants in La Paz (Tarlac) and Sta. Rosa City (Laguna) exceeded the toxic concentration of 3%. These K concentrations can be due to the increase of the nutrient's availability owing to the neutral soil pH levels in the two sites. The highest total Ca levels were found in the Polangui (Albay), La Paz, and Villasis (Pangasinan) soils. These Ca levels can be ascribed to the occurrence of Ca in sand and silt-sized soil fractions. Total Fe and Mn concentrations were very high in the Sta. Cruz (Zambales) soil due to the input of mine wastes. The San Leonardo (Nueva Ecija) soil's high total Fe concentration is probably due to the occurrence of Fe in clay-sized soil fractions. Iron and Mn levels of rice in most Central Luzon sites exceeded the toxic concentrations of 1000 mg kg-1 for Fe and 300 mg kg-1 for Mn. These concentrations can be due to the high total soil Fe and Mn levels, and their increased plant uptake due to periodic soil submergence and increased soil acidity from continuous cropping. The study implies that K, Ca, Fe and Mn are enriched in rice areas due to soil properties and farm practices.

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Variability of soil characteristics around an active volcano, Mt. Mayon in the Philippines with special reference to the distance and direction from the crater

Sambajon,

Kobayashi,

Almorfe

et al. 2024

Soil Science and Plant Nutrition

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Morphological characteristics and distribution patterns of lowland soils in the Philippines

Cited by 3 publications

References 1 publication

Energy efficiency of rice production in farmers’ fields and intensively cropped research fields in the Philippines

Energy efficiency of rice production in farmers’ fields and intensively cropped research fields in the Philippines

Levels and sources of potassium, calcium, sulfur, iron and manganese in major paddy soils of the Philippines

Variability of soil characteristics around an active volcano, Mt. Mayon in the Philippines with special reference to the distance and direction from the crater

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