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VALUASI EKONOMI SUMBERDAYA LAHAN: PRODUKTIVITAS

VALUASI EKONOMI SUMBERDAYA LAHAN: PRODUKTIVITAS. Diabstraksikan : soemarno , jtnh fpub 2014. …PRODUKTIVITAS TANAH.

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VALUASI EKONOMI SUMBERDAYA LAHAN: PRODUKTIVITAS

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  1. VALUASI EKONOMI SUMBERDAYA LAHAN: PRODUKTIVITAS Diabstraksikan : soemarno, jtnhfpub 2014

  2. …PRODUKTIVITAS TANAH. SOIL Fertility is the inherent capacity of a soil to supply nutrients in adequate amounts and suitable proportions, whereas soil productivity is a wider term referring to the ability of a soil to yield crops (Brady, 1974). The chief factors in soil productivity are soil organic matter (including microbial biomass), soil texture, structure, depth, nutrient content, water-storage capacity, reaction and absence of toxic elements. The soil productivity depends on physical, hydric, chemical and biologic characteristics and their interaction. Brady, N.C. 1974. The Nature and properties of soils. 8th Edition. Macmillan, New York. DiunduhdariSumber: http://www.fao.org/docrep/006/y4690e/y4690e08.htm.................... 3/11/2012 .

  3. PRODUKTIVITAS LAHAN Land productivity measures the wealth generated on a piece of land. High land productivity translates into : Lower resource wastage, Improved production processes, Shorter turn-around time and, Greater cost-savings. DiunduhdariSumber: http://www.mpl.ird.fr/crea/taller-colombia/FAO/AGLL/pdfdocs/landqual.pdf .................... 3/11/2012 .

  4. KUALITAS & SIFAT-CIRI, KARAKTERISTIK TANAH Soil quality is generally defined in terms of the capacity of a soil to perform specific functions in relation to human needs or purposes, including maintaining environmental quality and sustaining plant and animal production (Lal, 1998a). Soil quality, in turn, derives from a variety of particular physical, chemical, and biological properties that support these functions, including topsoil depth, texture, bulk density, and water-holding capacity; organic matter, pH level, and extractable nitrogen, phosphorus, and potassium; and microbial biomass (Mausbach and Seybold, 1998). Some of these properties (e.g., pH, N, P, and K) are characterized by optimum levels; departures from these optima (in either direction) are associated with reduced soil quality. Other properties (e.g., topsoil depth and microbial biomass) contribute positively to soil quality at all levels, while some (e.g., bulk density) are inversely related to soil quality. In addition to soil properties, other characteristics also play a critical role in determining land quality, including aspects of terrain (such as slope) and climate (such as temperature and precipitation, and thus the length of growing period). Lal, R. 1998a. “Soil Erosion Impact on Agronomic Productivity and Environment Quality.” Critical Reviews in Plant Sciences 17(4): 319-464. Mausbach, M. J., and C. A. Seybold . 1998. “Assessment of Soil Quality.” In Soil Quality and Agricultural Sustainability, edited by Rattan Lal. Chelsea, MI: Ann Arbor Press. DiunduhdariSumber: http://www.ers.usda.gov/media/521837/aer823c_1_.pdf.................... 3/11/2012 .

  5. STORIE INDEX The Storie index is a method of soil rating based on soil characteristics that govern the land's potential utilization and productivity capacity. It is independent of other physical or economic factors that might determine the desirability of growing certain plants in a given location. The evaluation is easy to be realized, being this an advantage of this method. A variety of categories are comprised in few categories. Four or five parameters are evaluated: A: Soil depth and texture; B: Soil permeability; C: Soil chemical characteristics; D: Drainage, Surface runoff; E: Climate (only if it is not homogeneous, if so than it should not be included in the formula); The index is calculated from the multiplication of these parameters, that is: Sindex = A x B x C x D x E The disadvantage of this method is that if we have a value of zero in any category, than the result will be zero and won't be suitable for using. DiunduhdariSumber: http://en.wikipedia.org/wiki/Storie_index.................... 3/11/2012 .

  6. STORIE INDEX RATING SYSTEM The Storie Index Rating system ranks soil characteristics according to their suitability for agriculture from Grade 1 soils (80 to 100 rating), which have few or no limitations for agricultural production to Grade 6 soils (less than 10), which are not suitable for agriculture. Under this system, soils deemed less than prime can function as prime soils when limitations such as poor drainage, slopes, or soil nutrient deficiencies are partially or entirely removed. The six grades, ranges in index rating, and definition of the grades, as defined by the NRCS, are provided below in Table Storie Index Rating System. DiunduhdariSumber: http://www.ci.oakley.ca.us/UserFiles/File/planning/RiverOaksCrossing%20Revised/3.9_Agricultural%20Resources_final.pdf.................... 5/11/2011 .

  7. Storie Index Rating System … DiunduhdariSumber: .................... 5/11/2011 .

  8. Rating soils for agricultural, forest and grazing use. STORIE, R. E. Journal Transactions 4th Int. Cong. Soil Sci. 1950 Vol. 1 pp. 336-339 … . The Storie Index, a general soil-rating system of particular use in evaluating soils from an agricultural standpoint for tax assessment, land appraisal and general land-use planning purposes, is obtained by the multiplication of the per cent ratings given to FACTORS: A, the soil-profile depth and permeability; B, texture; C, slope and X, factors modifiable by management, namely drainage, salinity or alkalinity, nutrient level, acidity, erosion and micro-relief. The crop-productivity rating of a soil type is based on its yield as compared with that of the soil types giving the highest yield under stated management practices and climatic conditions, and is expressed in ratios from 10 to 1 (that is 100% to 10% of highest yields). A given soil type may have one rating when undrained, another when drained and a third when d "a ned and fertilized and so on. Timber soil ratings are similarly handled but where production is unknown, they are worked out bλ multiplying the ratings for factors A, depth and texture; B, permeability; C, chemical properties such as salinity; D, drainage and runoff and E, climate, including rainfall, temperature, aspect. DiunduhdariSumber: http://www.cabdirect.org/abstracts/19511900206.html;jsessionid=C0E71A3FA5EEDD62EF48270B1D7C59AA .................... 5/11/2011 .

  9. .Storie Index Rating System… The Storie Index Rating System ranks soil characteristics according to their suitability for agriculture from Grade 1 soils (80 to 100 rating), which have few or no limitations for agricultural production, to Grade 6 soils (rating of less than 10), which are not suitable for agriculture. Under this system, soils deemed less than prime can function as prime soils when limitations such as poor drainage, slopes, or soil nutrient deficiencies are partially or entirely removed. The six grades, ranges in index rating, and definition of the grades as defined by the Natural Resources Conservation Service are provided below in Table. DiunduhdariSumber: ftp://ftp.co.imperial.ca.us/icpds/eir/east-brawley-geothermal/07ag-resources.pdf .................... 5/11/2011 .

  10. STORIE INDEX RATING SYSTEM…

  11. SOIL RATING CHART .Storie soil index rating = Faktor A x Faktor B x Faktor C x Faktor X Faktor A : Rating karakterfisikprofiltanah Sumber: Storie Index Soil Rating. R.E. Storie. Experiment Station Berkeley, Univoc California. 1978

  12. SOIL RATING CHART .Storie soil index rating = Faktor A x Faktor B x Faktor C x Faktor X Faktor A : Rating karakterfisikprofiltanah Sumber: Storie Index Soil Rating. R.E. Storie. Experiment Station Berkeley, Univoc California. 1978

  13. SOIL RATING CHART .Storie soil index rating = Faktor A x Faktor B x Faktor C x Faktor X Faktor A : Rating karakterfisikprofiltanah Sumber: Storie Index Soil Rating. R.E. Storie. Experiment Station Berkeley, Univoc California. 1978

  14. SOIL RATING CHART .Storie soil index rating = Faktor A x Faktor B x Faktor C x Faktor X Sumber: Storie Index Soil Rating. R.E. Storie. Experiment Station Berkeley, Univoc California. 1978

  15. SOIL RATING CHART .Storie soil index rating = Faktor A x Faktor B x Faktor C x Faktor X FAKTOR B. RATING BERDASARKAN TEKSTUR TANAH LAPISAN ATAS Sumber: Storie Index Soil Rating. R.E. Storie. Experiment Station Berkeley, Univoc California. 1978

  16. SOIL RATING CHART .Storie soil index rating = Faktor A x Faktor B x Faktor C x Faktor X FAKTOR B. RATING BERDASARKAN TEKSTUR TANAH LAPISAN ATAS Sumber: Storie Index Soil Rating. R.E. Storie. Experiment Station Berkeley, Univoc California. 1978

  17. SOIL RATING CHART .Storie soil index rating = Faktor A x Faktor B x Faktor C x Faktor X FAKTOR C. RATING BERDASARKAN KEMIRINGAN Sumber: Storie Index Soil Rating. R.E. Storie. Experiment Station Berkeley, Univoc California. 1978

  18. SOIL RATING CHART .Storie soil index rating = Faktor A x Faktor B x Faktor C x Faktor X FAKTOR X. RATING BERDASARKAN FAKTOR LAINNYA, SELAIN FAKTOR A, B, DAN C. Sumber: Storie Index Soil Rating. R.E. Storie. Experiment Station Berkeley, Univoc California. 1978

  19. SOIL RATING CHART .Storie soil index rating = Faktor A x Faktor B x Faktor C x Faktor X FAKTOR X. RATING BERDASARKAN FAKTOR LAINNYA, SELAIN FAKTOR A, B, DAN C. Sumber: Storie Index Soil Rating. R.E. Storie. Experiment Station Berkeley, Univoc California. 1978

  20. SOIL RATING CHART .Storie soil index rating = Faktor A x Faktor B x Faktor C x Faktor X SOIL GRADING Sumber: Storie Index Soil Rating. R.E. Storie. Experiment Station Berkeley, Univoc California. 1978

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