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/