Post on 16-Nov-2014
MINIMUM DATA SET PADA ASESMEN KUALITAS TANAH
The SSSA SQ definition
Soil quality is the capacity of a specific kind of soilto function, within natural or managed ecosystemboundaries, to sustain plant and animal productivity,maintain or enhance water and air quality,and support human health and habitation
(Agronomy News, June 1995)
Soil quality
How to know the quality of soil ?????Evaluating the soil properties or
Assessing the soil quality using any indicators of soil properties
MINIMUM DATA SET: INDIKATOR KUANTITATIF PADA ASESMEN KUALITAS TANAH
Asesmen Kualitas Tanah Dilakukan Dengan Mengevaluasi Berbagai Indikator:
Fisik, Kimia, Biologi, Proses atau Karakteristik Tanah. Dapat Pula Dari Penampilan atau Morfologi Tanaman
Asesmen Kualitas Tanah: (1) Kualitatif dan (2) Kuantitatif(1) Kualitatif: Asesmen yang dilakukan secara sederhana, dan tanpa alat ukur, Serta sifatnya subjektif, sehingga hasilnya tidak dapat dibandingkan dengan
Hasil pengukuran orang atau wilayah lain;
(2) Kuantitatif: Pengukuran setiap indikator dilakukan secara akurat menggunakan alat ukur dan standar nilai yang tepat, sehingga sifatnya
objektif dan dapat dibandingkan dengan hasil pengukuran lain
Soil Function Soil Function Soil Function
Management Goals
Minimum Data Set
Indicator Indicator Indicator IndicatorIndicator
score score score score score
Index Value
Soil Function Soil Function Soil Function
Management Goals
Minimum Data Set
Indicator Indicator Indicator IndicatorIndicator
score score score score score
Index Value
Soil Function Soil Function Soil Function
Management Goals
Minimum Data Set
Indicator Indicator Indicator IndicatorIndicator
score score score score score
Index Value Karlen et al. (2004)
Karena Banyaknya Sifat-Sifat Tanah Maka Sifat-Sifat Tersebut TidakDapat Diukur Semuanya, Maka Suatu “Set” Sifat-Sifat Tanah Minimum yang
Dapat Diukur dan Berpengaruh Terhadap Kapasitas Tanah UntukMemainkan/Melakukan Peran dan Fungsinya Didalam Produksi Tanaman
atau Lingkungan ------- Minimum Data Set (MDS)
Minimum Data Set (MDS) --------
Biasanya Tidak Mencakup Semua Sifat-Sifat Tanah, Hanya Sifat-Sifat yang
Relevan Dengan Wilayah atau Sistem Pertanian (Farming Systems)
MDS ---- Kelompok Minimum Indikator yang Dibutuhkan untuk Memperoleh
Pemahaman yang Komprehensif Terhadap Kualitas Tanah yang Dievaluasi
Minimum Data Set ---- Merefleksikan Pertanyaan :
“Pengukuran / Indikator Apa yang Harus Dibuat atau Apa yang Dapat Diamati Sehingga Akan Membantu Mengevaluasi Pengaruh
Pengelolaan Pada Fungsi Tanah Saat Ini maupun Waktu Akan Datang”
Sehingga Indikator yang Dipilih:
- Dapat Diukur oleh Sebanyak Mungkin Pemakai, Tidak Hanya Oleh Kalangan Terbatas- Menggambarkan Proses Ekologis Utama Didalam Tanah- Berkaitan Dengan Fungsi Ekosistem Utama- Mengintegrasikan Sifat-Sifat Fisik, Kimia, dan Biologi Tanah
Example of a Minimum Data Set of Indicators for Soil Quality
Indicator Relationship to Soil Health
Soil organic matter (SOM) Soil fertility, structure, stability, nutrient
retention, soil erosion, and available water capacity
PHYSICAL
Soil structure Retention and transport of water and nutrients, habitat for
microbes, and soil erosion
Depth of soil and rooting Estimate of crop productivity potential,
compaction, and plow pan
Infiltration and bulk density Water movement, porosity, and workability
Water holding capacity Water storage and availability
CHEMICAL
pH Biological and nutrient availability
Electrical conductivity Plant growth, microbial activity, and salt tolerance
Extractable nitrogen (N),
phosphorus (P), and potassium (K)
Plant available nutrients and potential for N and P loss
BIOLOGICAL
Microbial biomass carbon (C) and N Microbial catalytic potential and
repository for C and N
Potentially mineralizable N Soil productivity and N supplying potential
Soil respiration Microbial activity measure
(Adapted from: Doran et al, 1996; Larson and Pierce, 1994; and Seybold et al, 1997)
Tugas Portofolio: Nilai 20%
Menyusun portofolio tentang konsep minimum data set dan menyelesaikan Problem MDS pada berbagai jenis”farming systems”
ASESMEN KUALITAS ASESMEN KUALITAS TANAHTANAH
ASESMEN KUALITAS ASESMEN KUALITAS TANAHTANAH
ASESMEN KUALITAS TANAHASESMEN KUALITAS TANAH
ASESMEN KUALITAS TANAHASESMEN KUALITAS TANAH
MLRA 42, Southern Desertic Basins, Plains, MountainsMLRA 42, Southern Desertic Basins, Plains, Mountains LRU: SD-2LRU: SD-2
ClimateClimate8-10” ppt8-10” pptmostly summer pptmostly summer ppt6060oo F; 5 below zero to 110 F; 5 below zero to 110200-215 FFD200-215 FFD
Elevation and topographyElevation and topography 3,800- 5200 feet3,800- 5200 feet““gently sloping plains brokengently sloping plains broken
by mountains” by mountains”SoilsSoils
ThermicThermicUstic AridicUstic AridicArgids, Calcids, Cambids, TorrispammentsArgids, Calcids, Cambids, Torrispamments
Potential natural vegetationPotential natural vegetationGrassland, mixed grassland-shrub.Grassland, mixed grassland-shrub.Black grama, bush muhly, giant Black grama, bush muhly, giant
dropseed, tobosa, soaptree yucca, dropseed, tobosa, soaptree yucca, creosote, tarbushcreosote, tarbush
SD-2
Black grama-Tobosa grassland
Tobosa-Burrograss grassland
2. 2. Soil-landscape relationships are Soil-landscape relationships are developed and soils are mapped.developed and soils are mapped.
SoilsSoilsSoil QualitySoil Quality
Soil QualitySoil Quality
Soil functions to :Soil functions to : Sustain plant growthSustain plant growth Sustain environmental qualitySustain environmental quality Provide for plant, animal, and human health.Provide for plant, animal, and human health.
The terms “Soil Quality” and “Soil Health” The terms “Soil Quality” and “Soil Health” describe the soil’s ability to perform the describe the soil’s ability to perform the above functions.above functions.
KONSEP KUNCI DALAM ASESMEN KONSEP KUNCI DALAM ASESMEN KUALITAS TANAHKUALITAS TANAH
Asesemen Kualitas Tanah Dilakukan Asesemen Kualitas Tanah Dilakukan Dengan Mengevaluasi Indikator Dari Dengan Mengevaluasi Indikator Dari
Karakteristik TanahKarakteristik Tanah
Assessment of Soil QualityAssessment of Soil Quality
Not one measurable parameter.Not one measurable parameter. Soil Quality Indicators:Soil Quality Indicators:
Physical propertiesPhysical properties• Soil TextureSoil Texture• Bulk Density – weight per unit volumeBulk Density – weight per unit volume• Rooting/soil depthRooting/soil depth• Water infiltration/conductivityWater infiltration/conductivity• Water Holding CapacityWater Holding Capacity• Structure/Aggregate StabilityStructure/Aggregate Stability
Soil Quality IndicatorsSoil Quality Indicators
Soil Chemical PropertiesSoil Chemical Properties pHpH Electrical Conductivity (EC)Electrical Conductivity (EC) Cation Exchange Capacity (CEC)Cation Exchange Capacity (CEC) Soil Organic Matter (SOM)Soil Organic Matter (SOM) Mineralizable NMineralizable N Exchangeable Cations (nutrients)Exchangeable Cations (nutrients)
Soil Quality IndicatorsSoil Quality Indicators
Soil Biological PropertiesSoil Biological Properties Organic NitrogenOrganic Nitrogen Organic CarbonOrganic Carbon Microbial BiomassMicrobial Biomass MacroorganismsMacroorganisms
Sembilan (9) Tahap Dalam Sembilan (9) Tahap Dalam Asesmen Kualitas TanahAsesmen Kualitas Tanah
1.1. Identify Problems and OpportunitiesIdentify Problems and Opportunities
2.2. Determine Assessing Soil Quality GoalsDetermine Assessing Soil Quality Goals
3.3. Inventory Resources of Assessing Soil QualityInventory Resources of Assessing Soil Quality
4.4. Analyze Resources DataAnalyze Resources Data
5.5. Formulate AlternativesFormulate Alternatives
6.6. Evaluate AlternativesEvaluate Alternatives
7.7. Make DecisionsMake Decisions
8.8. Implement the PlanImplement the Plan
9.9. Evaluate the Plan – Follow UpEvaluate the Plan – Follow Up
Identify Problems and Identify Problems and OpportunitiesOpportunities
Identify General Resources Problems, Identify General Resources Problems, Opportunities, and Concerns. Collect Opportunities, and Concerns. Collect
on General Information Resources on General Information Resources Need (Soil Map, PlanNeed (Soil Map, Plan t t Management, Management,
Technical Asst., Other Resources)Technical Asst., Other Resources)
ASSIGMENT FOR 2008 CLASS:
Make a paper for this lecture at least 5 pgs, on three weeks after holyday.
Personal assigment.