This guide on "Simplified Keys to Soil Range Identification" has been developed to make the field identification of soils easier. The guidebook contains the different colors, texture, pH, coarse fragments and specks of the most common soils in Isabela and contains four simple steps to identify the soil series right in the field. In the Philippines, the project "Simplifying the Philippine Soil Series for Rice and Maize" began in 2005 under the Nutrient Management Support System (NuMaSS) to provide management recommendations for soils identified in the field.
Compare the soil sample with the color chart in the “Simplified Keys to Soil Series” manual (see page 73). Simplified Keys to Soil Series” is a tool/guide for identifying soil series in the field by following simple steps, for use by researchers, agricultural technologists, extension agents, farmers and other stakeholders in the rice industry. It involves just five basic soil properties (color, texture, pH, coarse fragments and spots) at a soil depth of 30-50 cm and four simple steps for identifying the soil ranges in the field.
Gapu ta agpapada ti kababalin ti isu met laeng a serye ti daga, ti teknolohia a panangtarawidwid iti daga iti maysa a lugar ket mabalin a mayaplikar kadagiti dadduma a lugar nga addaan iti agpapada a pakabigbigan ti daga. Sangapulo ket innem a serye ti daga a masarakan iti Isabela (Alaminos, Annam, Bago, Bantog, Bigaa, Cauayan, Faraon, Guimbalaon, Ilagan, Quingua, Rugao, San Manuel, San Juan, Sibul, Sta. Rita ken Tagulod) ti nairaman iti daytoy a giya. ...
SOIL COLOR GROUPS
Black/Grayish brown
Black/Grayish brown Texture: Clay
Light Brown/Yellowish Brown
Light Brown/Yellowish Brown Texture: Clay
It is a typical representative of the large group of Epiaqualfs: aqu, it has an aqueous moisture regime, i.e. it is an inceptisol (epts, Latin, inceptum, beginning), which means that this soil is just beginning to develop and shows soil horizons. It is a representative of a large group of Endoaquerts found in areas with pronounced wet and dry seasons (ustic).
It is a mollisol (olls, from Latin mollis, meaning soft) found in areas with pronounced wet and dry seasons (ust, ustic). It is an Alfisol (alfs) found in areas with well-distributed rainfall (From the word Udic), with a Kandian characteristic (kandi), i.e. finely structured soil with 35-60% clay content, without any particular mineral of any kind dominating the soil (Mixed).
It is an Alfisol (alfs) found in areas with pronounced wet and dry seasons (Ust from the word ustic), with minimal horizontal complexity (Hapl). Fine clay-textured soil with a moderate amount of clay with no particular mineral of any kind dominating the soil (mixed). It is a representative of the large group of Epiaquolls: a Mollisol (olls), from Latin, mollis meaning soft.
It has an aquic (aqu) moisture regime where it is saturated for extended periods of time, manifested by a gray color with or without spots, indicating poor internal drainage. It is a representative of the large group of Haplustalfs: Hapl, the bottom has minimal complexity of horizonation; Usually it has a ustic moisture regime, i.e. it is an Alfisol, alfs, which means that there is alluvial accumulation of clay in the subsurface horizons from the underlying horizons. Soil fertility is moderate to high (average OM, low P, average K) with low to high pH.
It is a representative of the large group of Haplustepts that occur on river floodplains and are subject to seasonal river flooding (Fluventic). Hapl, means that the soil has a minimum complexity of horizonation; ust, from the word ustic, a moisture regime characterized by pronounced wet and dry seasons; epts, This is an Inceptisol (Latin, inceptum or beginning), which indicates that this soil is just beginning to develop and shows soil horizons. It is a typical (typical) representative of large group of Eutrudepts: Eutr, indicating high base saturation found in areas with udic (ud, well distributed rainfall), moisture regime.
It is an Alfisol (alfs), meaning that there is alluvial accumulation of clay in the subsurface horizons from the underlying horizons. Soil with a fine structure and a clay content of 35-60%, where no specific mineral in the soil dominates (mixed).
Crop Suitability Analysis
It is the ultimate goal of soil surveying and this can be arrived at through good judgment and a thorough assessment of soil properties and qualities such as soil depth, texture, slope, drainage, erosion, flooding and fertility. Based on these characteristics, the suitability of a particular land area for crop production is determined. It implies which crop(s) would provide the greatest benefit in terms of productivity and profitability from a given soil type, indicated by S1 as the most suitable, S2 as moderately suitable and S3 as marginally suitable.
The symbol N indicates that the crop is either currently not suitable (N1), where the impact of limitation is so severe that it reduces yield and requires expensive inputs, or is permanently not suitable (N2), where the limitations cannot be permanently corrected . Crop suitability analysis also provides information on soil properties that limit the production of specified crops. This means that you can achieve 75% of the crop's potential yield when the soil index is highly suitable (S1), while less than 25% of the potential yield when the soil index is not suitable (N).
GUIDE FOR ABBREVIATIONS
SteepN2tN1N1N1N1N2 N2 Annam loamRolling to moderately steepS3fcS3tcS3fcS3fN1N2 N2 Bago loamLevel to near levelS3fcS3cS3cN1fS3cfN2 S3w Bago sandy loam loam-3sfN mod3sfN to3cfN2 S3fN2. MaizeTobacco Coffee ArabicaAvocado o sandy y clay The wave to rollingS3fcS3cfS3cfN1fS3cfN2 S2 The wave to rollingS3fcS3cfS3cfN1fS3cfN2 S2 took clay Level to almost levelS3cfwS3cwS3Us3cwn rolling NcfwS3cwS2AwS3cfwS3cwS3U cS2cS2cS2fwtS2cN2 S 3w yan lerLevel to near levelS3cf S3cfS3cfS3fS3cwN2 N1 yan lerWaves to rollingS3cf S3cfS3cfS3fS3cwN2 N1. Level to near levelS3cf S3cfS3cfS3fS2cN2 S3w Cauayan sandy loam Rolling to moderately steepS3cf S3cfS3cfS3fS3ctN2 S3t.
Guimbalaon claNiveau to almost S3cf S3cfS3cfS3fS3ctwN2 N1 y loamlevel Ilagan loamThe wave to S3cf S3cfS3cfS3fS3cfwN2 S3w rolling Ilagan sand Very steepN2 N2 N2 N2 N2 N2am. MaizeTobacco Coffee ArabicaAvocado yan clay Level to near levelS3cf S3cfS3cfS3fS3cwN2 N1 Level to near levelS3cf S3cfS3cfS3fS2cN2 S3w yan Rolling to moderately steepS3cf S3cfS3c locfN locf S3cfS3c level S3cfS3cfS3fS3ctwN2 N1 a loamWavy to rollingS3cf S3cfS3cf S3fS3cfwN2 S3w a sandy Very steepN2 N2 N2 N2 N2 N2 S3w ype Topography Lowland Rice Rainfed Rice Rainfed. Maize Tobacco Coffee ArabicaAvocado Level to almost levelS2cS2cS2cS2cS3cfN2 S2w Rolling to moderately steepS1cS1cS1cS1cS3cfN2 S2w Level to almost levelS1f S1cS1cS1cS3cfN2 S2cf rolling SU3cf Sf rolling SU3cf Sf N2 S3f ao Clay Undulating to rollingS3f S3f S3f S3f S2 cfN2 S3f ao sandy Slightly sloping to undulatingS3f S3f S3f S3f S2cfN2 S3f.
Level to near levelS3cfS3cfS3cwS3cfS3cfN2 S3f Sta Rita clayLevel to near levelS3cw S3cwS3cwS3cwS3wN2 N1 Sibul clay Sloping to steepS3sS3sS3sS3wS3sN1csS3lod clay2sf near2wsf2w2sf2w2s2 fwS2fwN1cwS2fw. Maize Tobacco Coffee ArabicaAvocado SteepN1 N1 N1 N1 N1 S3S3f Juan clay Rolling to moderately steepS3cfwtS3cwtfS3cwtfS3cwtS3cwtfN2 S3f Undulating to rollingS3cfS3cfS2cfS3cfS3cfS3cfS3cfS3cfS3cfS3cfS3cfS3cfS3cf S3cfS3cfN2 S3f A clay level to nearly levelS3cw S3cwS3cwS3cwS3wN2 N1 ySlopes to steepS3sS3sS3sS3wS3sN1csS3fs y Level to nearly levelS2fwS2fwS2fwSfwS2WFNwgCail ansPeanutCoffee Robusta. Rolling to moderate steepS3ftN1fS3ftN1fN1fN1f Assume clay loamSteepN1N2N1tN2tN1tN1t Assume clay loamRolling to moderate steepN1N2N1tN2tN1tN1t Bago loam loamN12N1fN close to clay loamN12N1fN close to clay loamN12S1fN loamRolling to moderately steepN2N 1fS2N1fN1fS2fw Bago sandy loam The wave for rollingN2N1fS2N1fN1fS2fw Bago sandy loam The wave for rollingN2N1fS2N1fN1fS2fw.
Grade to near gradeN2S3wN1wS3cwN1wN2f Bigaa clayWavy to undulatingN2S3fwS3wS3cwtS3wS3w Cauayan clayLevel to near gradeN2N1fN1wS3cfwN1fwN1w Cauayan clayWavy to undulatingS3cwN1fN1wS3cfwN1fwN1w Cauayan -clay loamLevel to near gradeS3c wN1fN1wS3cwtN1fwN1wCauayan loamLevel to near gradeS3wN1fS2S3cwtN1fS3wCauayan sandy loamSloping to moderately steepS3cftN1fS3tS3cftN1fS3t. Grade to near gradeS3cfwtN1fN1wN1fN1fwN1w Ilagan loamWavy to undulatingS3c N1fS2S3cfN1fS3w Ilagan sandy loamVery steepS3csN2N2S3cfN1fN2f Quingua clay loam Grade to near gradeS3cS2S2S2cwS3wN2f. Quingua silty cla Level to almost N2S2S2S2c S3wN2f y loam level S3cfN1fS3fN1fN1fS3f Rugao clayWavy to rolling.
Level to near gradeN2S2S3fS3f S3f N2f Sta Rita clayLevel to near gradeS3cwS3wS3wS3wN1wN1w Sibul claySloping to steepS3sS3sS3sS2fwS2wtS3fw Tagulod clay loamLevel to near gradeS2fwS2fwS3wS2fwS3wS3w. Grade to near gradeS3wS3wN1wS2cfwtS3cwS2cwft Bigaa clayWavy to undulatingS2wtN1wS3wS3wS3cwS3cfw Cauayan clayLevel to near gradeS3fwN1wN1wS3wN2cS3cfw Cauayan clayWavy to undulatingS3fwN1wN1wS3wN2cS3cf w Cauayan clay loam Level to near levelS3fwS3wN1wS2cfw S3cfS3cfw Cauayan clayLevel to near levelS3fS3tS3fwS3tN2cS3cft Cauayan sandy loam Sloping to moderately steepS3wtN1wS3ftS3fwN2cN1f. Level to near gradeS2tN1wS2ctS2w S3cwS3w Sta Rita clayLevel to near gradeS3wN2sN1wS2ctS3tS2fw Sibul claySloping to steepS2wtS3wS3sS2cwS3tS2fw Tagulod clay loamLevel to near gradeS2wS3w.
Rita Tagulod Recommended Cropslowland/upland rice, maize, tobacco, avocado, cabbage, mango, beans, peanuts, sorghum, cassava, cotton, potato, wheat, mung bean. Soil in the rolling highlands of San JuanSibul Recommended Crop Rainfed lowland/upland rice, maize, avocado, tobacco, banana, cabbage, beans, sorghum, cassava, potato, wheat, mung bean.
APPENDICES
STEPS TO IDENTIFY SOIL SERIES
THE PALAYCHECK SYSTEM
The Palaycheck system is an integrated rice crop management that combines technologies and learning processes to identify the strengths and weaknesses of the current.
Collaborators
