Negros Oriental
| Municipality | Soil Series | Area (Ha) |
|---|
| Amlan | Faraon | 427.38 |
| Isabela | 36.45 | |
| La Castellana | 2,181.07 | |
| Mandawe | 24.10 | |
| San Manuel | 251.68 | |
| Hydrosol | 195.19 | |
| Mountain soil (undiffe | 3,239.01 | |
| Ayungon | La Castellana | 352.87 |
| San Manuel | 216.45 | |
| Hydrosol | 7.93 | |
| Beach Sand | 34.43 | |
| Mountain soil (undiffe | 16,447.51 | |
| Bacong | Dauin | 35.55 |
| San Manuel | 254.07 | |
| Taal | 1,087.60 | |
| Tupi | 1,043.92 | |
| Mountain soil (undiffe | 185.75 | |
| Bais City | Faraon | 1,777.73 |
| Isabela | 3,177.12 | |
| La Castellana | 2,152.71 | |
| Hydrosol | 655.16 | |
| Mountain soil (undiffe | 19,187.33 | |
| Basay | Faraon | 16,183.83 |
| Bayawan City | Faraon | 40,449.95 |
| San Manuel | 4,512.05 | |
| Tupi | 22,341.58 | |
| Mountain soil (undiffe | 2,172.67 | |
| Bindoy | Batuan | 7.48 |
| Bolinao | 0.77 | |
| Faraon | 68.28 | |
| Isabela | 20.95 | |
| La Castellana | 1,003.47 | |
| San Manuel | 288.27 | |
| Mountain soil (undiffe | 18,861.34 | |
| Canlaon City | Faraon | 5,528.78 |
| La Castellana | 216.03 | |
| Mountain soil (undiffe | 8,987.97 | |
| Dauin | Taal | 3,811.07 |
| Tupi | 740.20 | |
| Mountain soil (undiffe | 3,457.57 | |
| Dumaguete City | Isabela | 21.12 |
| San Manuel | 2,269.19 | |
| Taal | 721.56 | |
| Tupi | 48.30 | |
| Guihulngan City | Bolinao | 291.01 |
| Faraon | 12,461.16 | |
| Isabela | 897.77 | |
| Lugo | 804.84 | |
| Mandawe | 152.02 | |
| San Manuel | 109.68 | |
| Hydrosol | 33.87 | |
| Mountain soil (undiffe | 19,791.32 | |
| River wash | 35.76 | |
| Jimalalud | Faraon | 5,541.20 |
| Isabela | 764.18 | |
| San Manuel | 68.16 | |
| Beach Sand | 4.80 | |
| Mountain soil (undiffe | 6,255.40 | |
| La Libertad | Faraon | 6,456.39 |
| La Castellana | 279.18 | |
| San Manuel | 53.74 | |
| Beach Sand | 93.14 | |
| Mountain soil (undiffe | 6,654.84 | |
| Mabinay | Batuan | 5,245.21 |
| Faraon | 14,981.24 | |
| Guimbalaon | 3,056.25 | |
| Tupi | 4,753.95 | |
| Mountain soil (undiffe | 9,501.36 | |
| Manjuyod | Bolinao | 387.91 |
| Faraon | 320.37 | |
| Guimbalaon | 234.56 | |
| La Castellana | 943.26 | |
| San Manuel | 199.35 | |
| Hydrosol | 281.13 | |
| Mountain soil (undiffe | 7,232.32 | |
| Pamplona | Faraon | 780.04 |
| Isabela | 0.00 | |
| La Castellana | 1,748.09 | |
| San Manuel | 585.80 | |
| Mountain soil (undiffe | 18,395.02 | |
| San Jose | Faraon | 503.15 |
| La Castellana | 2,572.28 | |
| Beach Sand | 97.27 | |
| Mountain soil (undiffe | 1,529.22 | |
| Santa Catalina | Faraon | 3,182.35 |
| Mountain soil (undiffe | 46,395.60 | |
| Siaton | Isabela | 1,191.96 |
| San Manuel | 541.79 | |
| Siaton | 229.57 | |
| Zamboangita | 9,343.20 | |
| Beach Sand | 43.95 | |
| Mountain soil (undiffe | 19,062.66 | |
| Sibulan | Faraon | 403.78 |
| Isabela | 412.29 | |
| La Castellana | 3,055.43 | |
| San Manuel | 874.42 | |
| Beach Sand | 51.27 | |
| Mountain soil (undiffe | 16,930.17 | |
| Tanjay City | Faraon | 3,368.53 |
| Isabela | 2,087.16 | |
| La Castellana | 3,498.01 | |
| San Manuel | 1,296.39 | |
| Hydrosol | 946.48 | |
| Mountain soil (undiffe | 14,737.48 | |
| Tayasan | Faraon | 1,296.82 |
| Isabela | 323.47 | |
| San Manuel | 248.60 | |
| Beach Sand | 34.93 | |
| Mountain soil (undiffe | 13,797.11 | |
| Valencia | La Castellana | 62.47 |
| San Manuel | 351.94 | |
| Taal | 773.56 | |
| Tupi | 1,079.81 | |
| Mountain soil (undiffe | 12,175.37 | |
| Vallehermoso | Faraon | 6,873.66 |
| Isabela | 387.78 | |
| La Castellana | 78.91 | |
| Mandawe | 148.97 | |
| Hydrosol | 11.05 | |
| Beach Sand | 22.17 | |
| Mountain soil (undiffe | 4,279.70 | |
| Zamboanguita | Dauin | 384.33 |
| San Manuel | 225.69 | |
| Taal | 3,783.33 | |
| Tupi | 371.36 | |
| Zamboangita | 4,014.93 | |
| Mountain soil (undiffe | 6,157.21 | |
| River wash | 265.78 |
Soil Series
Properties limiting crop production
Management Recommendation
| Batuan | P deficiency; Shallow soil limiting productivity of shallow rooted crops; moderate soil erosion hazard; acidic | Adequate and balanced NPK fertilization; terracing or construction of bunds; liming; use of high yielding varieties | Contour terracing; balanced NPK fertilization; liming and addition of organic matter; use of high yielding varieties | Production can be limited due to shallow rooting depth of the soil; contour farming/terracing |
| Bolinao | Rolling topography in some areas which causes risk of erosion; shallow rooting depth; low available P and K | Suitable for rice but needs terracing and use of limestone outcrops for re-enforcing dikes/bunds; application of phosphate fertilizers; upland rice | Contour terracing; proper fertilization; proper timing of cultivation and planting; addition of organic matter and animal manure to improve soil fertility and application of phosphate fertilizers | Contour terracing; use of cover crops like Ipil-ipil for soil rehabilitation and source of firewood at the same time; addition of organic matter |
| Dauin | Shallow water table (<1m) thus poor drainage; saturated with water for repeated periods of time | Construction of drainage and flood control system; | Construction of drainage and flood control system; use of high broad beds, ridges | Construction of drainage and flood control system; Use of high broad beds, ridges |
| Faraon | Plants may suffer Fe and Zn deficiency due to high pH; K deficiency; shallow effective soil depth limiting productivity of shallow rooted crops; rock outcrops are present; hilly topography; growing period is possible only in rainy season unless irrigated | Construction of bunds for upland or terracing; application of ZnSO42 in lowland rice if deficiency occurs | Contour farming; shallow cultivation; fertilization; adequate irrigation system; minimum tillage to lessen erosion rates | Moderately suitable to root crops due to shallow rooting depth and presence of outcrops; minimum tillage to lessen erosion rates |
| Guimbalaon | Poor nutrient retention (leaching of bases); acidic; P and K deficiency (due to fixation); presence of hardpan; low moisture; severe erosion; presence of rock outcrops that impede drainage | OM incorporation; liming; Suitable for rice but needs terracing and use of outcrops for re-enforcing dikes | Contour terracing/farming; erosion prevention and water control practices; proper fertilization; OM incorporation; liming; subsoiling to break hardpan | Liming; proper fertilization and OM incorporation; contour terracing; subsoiling to break hardpan |
| Isabela | Crops cannot grow w/o drainage; slower N mineralization; Zn deficiency in rice; high P fixation; severe topsoil shrinking & swelling; hard to till; seasonal river flooding | Application of ZnSO42- in lowland rice when deficiency occurs; N and P fertilization; build drainage canals and flood control system | N and P fertilization; build drainage canals; construct broad beds, ridges; cultivate only at optimum moisture content; cover cropping | N and P fertilization; build drainage canals; cultivate only at optimum moisture content; not suitable for nuts; construct beds, ridges |
| La Castellana | N & P deficiency; acidic; severe erosion that losses the more fertile topsoil than the subsurface soil; presence of boulder outcrops that impede tillage; low moisture | N and P fertilization; liming in upland; adequate erosion control measures; adequate irrigation | N & P fertilization; liming; adequate erosion control measures; contour farming; strip cropping and cover-cropping; adequate irrigation | N & P fertilization; liming in upland rice and other diversified crops; adequate erosion control measures; adequate irrigation |
| Lugo | P deficiency; scanty water supply from rivers; difficult to till due to formation of hard clods; severe soil erosion that depletes the more fertile topsoil | P fertilization; adequate irrigation; OM incorporation to improve tilth; terracing | P fertilization; adequate irrigation; OM incorporation to improve tilth; erosion prevention measures e.g. contour terracing/farming | Slightly suitable due to formation of hard clods that may impede growth of root crops; proper tillage and OM incorporation; adequate fertilization |
| Mandawe | Frequent flooding | Adequate flood control systems; plant flood-tolerant varieties or crops | Adequate flood control systems and drainage system; Use of high broad beds, ridges | Adequate flood control systems; Use of high broad beds, ridges |
| San Manuel | Excessively wet and annual flooding for short periods and excessive drought during dry season; low OM | Suited for paddy rice during wet season and with adequate irrigation during dry season; OM addition thru animal or green manuring | Construction of adequate drainage, irrigation and flood control system due to seasonal flood hazard & high seasonal water table; use broad beds & ridges; suited for diversified crops such as corn, vegetable & watermelon in DS with supplemental irrigation | Establishment of adequate drainage and irrigation system; regular addition of organic matter and animal manure to improve soil fertility |
| Siaton | Only has minimum limitation; slightly compact | Split application of fertilizers; adequate irrigation or plant early maturing varieties | Adequate irrigation; fertilization; OM addition | Adequate irrigation; fertilization; OM addition |
| Taal | Very low in fertility; rapid leaching of bases, hence K, Ca, & Mg deficiency can occur; presence of many stones/gravels; moderate erosion | NPK fertilization; adequate drainage system; organic matter incorporation; crop rotation with legumes/ green manuring or cover cropping | NPK fertilization; adequate drainage system; organic matter incorporation; crop rotation with legumes/ green manuring or cover cropping | Adequate fertilization; terracing; cover cropping |
| Tupi | Low fertility; acidic; K deficiency; severe erosion removing the more fertile topsoil | Liming upland; adequate erosion control measures; adequate fertilization | Liming; implement erosion control measures e.g. contour/terracing; OM addition and adequate and timing fertilization; cover cropping/green manuring | Implement erosion control measures e.g. contour/terracing; adequate fertilization |
| Zamboangita | Soil easily dried up during summer; presence of rock outcrops that impede tillage; low P & K; severe erosion hazard causing gullies formation | Upland rice; adequate irrigation system; terracing/construction of bunds | Ensure cover crops; contour faming or terracing; irrigation system; PK fertilization | Ensure cover crops; contour faming or terracing; construct irrigation system; fertilizers application |