Asesmen Kualitas Tanah

ASESMEN KUALITAS TANAH

ASESMEN KUALITAS TANAH

ASESMEN KUALITAS TANAH

ASESMEN KUALITAS TANAH

MLRA 42, Southern Desertic Basins, Plains, Mountains

LRU: SD-2 Climate 8-10” ppt mostly summer ppt 60o F; 5 below zero to 110 200-215 FFD SD-2

Elevation and topography 3,800- 5200 feet “gently sloping plains broken by mountains”

Soils Thermic Ustic Aridic Argids, Calcids, Cambids, Torrispamments

Potential natural vegetation Grassland, mixed grassland-shrub. Black grama, bush muhly, giant dropseed, tobosa, soaptree yucca, creosote, tarbush

Black grama-Tobosa grassland

Tobosa-Burrograss grassland

2. Soil-landscape relationships are developed and soils are mapped.

Soils Soil Quality

Soil Quality  Soil functions to :   

Sustain plant growth Sustain environmental quality Provide for plant, animal, and human health.

 The terms “Soil Quality” and “Soil Health”

describe the soil’s ability to perform the above functions.

KONSEP KUNCI DALAM ASESMEN KUALITAS TANAH

Asesemen Kualitas Tanah Dilakukan Dengan Mengevaluasi Indikator Dari Karakteristik Tanah

Assessment of Soil Quality  Not one measurable parameter.  Soil Quality Indicators: 

Physical properties • • • • • •

Soil Texture Bulk Density – weight per unit volume Rooting/soil depth Water infiltration/conductivity Water Holding Capacity Structure/Aggregate Stability

Soil Quality Indicators  Soil Chemical Properties      

pH Electrical Conductivity (EC) Cation Exchange Capacity (CEC) Soil Organic Matter (SOM) Mineralizable N Exchangeable Cations (nutrients)

Soil Quality Indicators  Soil Biological Properties    

Organic Nitrogen Organic Carbon Microbial Biomass Macroorganisms

Sembilan (9) Tahap Dalam Asesmen Kualitas Tanah 1. 2. 3. 4. 5. 6. 7. 8. 9.

Identify Problems and Opportunities Determine Assessing Soil Quality Goals Inventory Resources of Assessing Soil Quality Analyze Resources Data Formulate Alternatives Evaluate Alternatives Make Decisions Implement the Plan Evaluate the Plan – Follow Up

Identify Problems and Opportunities  Identify General Resources Problems,

Opportunities, and Concerns. Collect on General Information Resources Need (Soil Map, Plan Management, 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.