Post on 16-Jul-2015
Behzod Abdullobekov
Tajik Agrarian University
August 16, 2012, Hungary
Lecture content
Land evaluation procedure
Land capability classification
Land productivity index
Land evaluation is aimed at assessment ofland performance and its production potentialfor a specific purpose.
Land evaluation is only part of the process ofland use planning.
The function of land use planning is to guidedecisions on land use in such a way that theresources of the environment are put to themost beneficial use for man, whilst at thesame time conserving those resources for thefuture.
match
Land-use
planning
policies & plans
Land
qualities
Land-use
requirements
suitability
Land Capability Classification
Soil and Land Irrigability Classification
Parametric methods
Land Productivity Index
Soil Productivity Index
There are eight capability classes
Class I to class IV : Arable land
(suitable for cultivation)
Class V to class VIII: Non-arable land
(unsuitable for cultivation)
The subclass are based on kinds of dominant
limitation such as wetness or excess water (w),
Climates (c) and erosion (e)
Land Productivity Index (LPI)= A*B*C*X*Y
Where factors are decimal equivalents of percentage ratings.
A = General characteristics of soil profile
B =Texture of the surface soil
C = Slope of the land
X = Miscellaneous factors; reaction of surface soil, fertility, erosion
Y = Average annual rainfall
The suitability of land for irrigation depends on physical factors like
quality and quantity of irrigation water and socio-economic factors
like land development costs provision of drainage facilities production
costs of individual crops.Class Definition
Class 1 Lands that have few limitations of soils, topography
or drainage for sustained use under irrigation.
Class 2 Lands that have moderate limitations of soil, topography
or drainage for sustained use under irrigation.
Class 3 Lands that have severe limitations of soil, topography or
drainage for sustained use under irrigation.
Class 4 Lands that are marginal for sustained use under irrigation
because of very severe limitations of either soil topography or
drainage.
Class 5 Lands that are temporarily classed as not suitable for
sustained use under irrigation.
Class 6 Lands not suitable for sustained use under irrigation.
In the FAO land evaluation procedure, land qualities/landcharacteristics of each land unit are compared with landuse requirements (LURs) to obtain an overall suitabilityassessment of the land unit for each of land utilizationtypes (LUTs)
FAO Framework classification describe the suitability ofan evaluation unit for a land use in four categories,
- Order
- Class
- Sub-class
- Unit
Assess land suitability based on: the requirements of specific land uses a comparative analysis of inputs vs.
benefits: multi-disciplinary the physical, economic and social context potential environmental impacts & sustainability
Local to global scales,highly populated to undeveloped areas,qualitative vs. quantitative.
(1) Suitability orders
All land is divided into two suitability orders,
according to whether the land is suitable or not for a
given LUT.
'S' = suitable, 'N' = not suitable, for the land use.
(2) Suitability classes
These are divisions of suitability orders that indicate
the degree of suitability, not simply suitable vs. not
suitable.
'S1' = suitable, 'S2' = moderately suitable, 'S3' =
marginally suitable, 'N1' unsuitable for economic
reasons but otherwise marginally suitable, 'N2' =
unsuitable for physical reasons. N3 implies
limitations that are not correctable at any cost within
the context of the land utilization type.
Vose district
Shurobod
Cadastral boundary
Final SuitabilityAssessment
Landqualities
Land-use requirement
Interim SuitabilityAssessment
Consultation
Interimmatch
LUT Land mapping Unit
classification system
•land improvements•environmental impacts•Social and economic analyses
•Objectives•Assumptions•LU options
LandEvaluation
Population supporting capacity
Agricultural development planning
Land degradation risk assessment
Agricultural inputs recommendations
Irrigation suitability assessment
Livestock forage balance assessmentAgricultural technology transfer
Environmental impact assessment
Student tasks
Topic: To do restorative plan the land cadastre map
Practices material :
Old cadastre map of Khatlon region.
Check the accuracy of updating
Report of procedure
Reference/