View: |
Part 1: Document Description
|
Citation |
|
---|---|
Title: |
Assessment of Land Degradation in Semi-Arid Zone of Central Tanzania |
Identification Number: |
doi:10.7910/DVN/HADLCK |
Distributor: |
Harvard Dataverse |
Date of Distribution: |
2021-05-26 |
Version: |
1 |
Bibliographic Citation: |
International Institute of Tropical Agriculture (IITA); University of Bonn, Germany, 2021, "Assessment of Land Degradation in Semi-Arid Zone of Central Tanzania", https://doi.org/10.7910/DVN/HADLCK, Harvard Dataverse, V1, UNF:6:jU30uW/R5JgiHw7dPr5iuQ== [fileUNF] |
Citation |
|
Title: |
Assessment of Land Degradation in Semi-Arid Zone of Central Tanzania |
Identification Number: |
doi:10.7910/DVN/HADLCK |
Authoring Entity: |
International Institute of Tropical Agriculture (IITA) |
University of Bonn, Germany |
|
Other identifications and acknowledgements: |
Reith, Jonathan (University of Bonn, Germany) |
Other identifications and acknowledgements: |
Dubovky, Olena (University of Bonn, Germany) |
Other identifications and acknowledgements: |
Muthoni, Francis (International Institute of Tropical Agriculture (IITA)) |
Other identifications and acknowledgements: |
Kimaro, Anthony (World Agroforestry Center) |
Other identifications and acknowledgements: |
Swai, Elirehema (Tanzania Agricultural Research Institute (TARI), Hombola) |
Producer: |
International Institute of Tropical Agriculture (IITA) |
Date of Production: |
2019-12 |
Distributor: |
Harvard Dataverse |
Distributor: |
International Food Policy Research Institute (IFPRI) |
Access Authority: |
Muthoni, Francis |
Depositor: |
KM, IFPRI |
Date of Deposit: |
2021-02-17 |
Date of Distribution: |
2021 |
Series Name: |
Biophysical Survey |
Holdings Information: |
https://doi.org/10.7910/DVN/HADLCK |
Study Scope |
|
Keywords: |
Agricultural Sciences, land degradation, sustainable agriculture, soil erosion, TANZANIA, EAST AFRICA, AFRICA SOUTH OF SAHARA, AFRICA |
Topic Classification: |
Natural resources, Sustainable agriculture |
Abstract: |
A sub-national field assessment of land degradation was conducted in the Kongwa districts of Tanzania in December 2019. 34 sampling plots were selected using a stratified sampling method based on a land cover map. One site that hosts Africa RISING technologies on land rehabilitation was purposely selected to act as a control. The primary sampling plots measured 100*100m and were subdivided into replicate sub-plots measuring 30x30m. A sub-sample of 3 sub-plots was selected in each primary plot for assessment of land degradation. The observations from 3 subplots (30*30) were averaged to obtain an aggregate value for the larger plot (100x100m). The antecedent biophysical conditions in the sampling plot were recorded i.e. the land use, degree of slope, topographical position, soil color, crop types grown and land tenure. The percentage of area that was undegraded in each plot was also estimated visually. </p> A questionnaire for mapping land degradation and sustainable land management was applied for visual assessment of the type, extent, degree, and direct causes of land degradation. The different types of land degradation, for example erosion by water, were scored whether they are present or not, in addition to their extent and degree (intensity). The extent represented the proportion of a sub-plot covered by different types of land degradation, the degree was divided into 4 classes in ascending order of intensity of land degradation (0 = Light, 1 = Moderate, 2 = Strong, 3 = Severe). Moreover, the type, purpose, extent, and effectiveness of sustainable land management practices (SLM) were visually assessed in every subplot. Data were recorded using the mobile-based KoboCollect toolbox and transmitted to a cloud database for storage and descriptive analysis. |
Time Period: |
2019-09-01-2020-08-31 |
Date of Collection: |
2019-12-2019-12 |
Country: |
Tanzania, United Republic of |
Geographic Unit(s): |
District |
Unit of Analysis: |
100x100m sampling plot |
Universe: |
Farm plot |
Kind of Data: |
observational data |
Methodology and Processing |
|
Sampling Procedure: |
34 sampling plots were selected from using a stratified sampling method based on a land cover map. One site that hosts Africa RISING technologies on land rehabilitation was purposely selected to act as a control. The primary sampling plots measured 100*100m and were subdivided into replicate sub-plots measuring 30x30m. A sub-sample of 3 sub-plots was selected in each primary plot for assessment of land degradation. The observations from 3 subplots (30*30) were averaged to obtain an aggregate value for the larger plot (100x100m). |
Sources Statement |
|
Data Access |
|
Citation Requirement: |
International Institute of Tropical Agriculture (IITA); University of Bonn, Germany. 2021. Assessment of Land Degradation in Semi-Arid Zone of Central Tanzania. Washington, DC: International Food Policy Research Institute (IFPRI) [dataset]. <a href="https://doi.org/10.7910/DVN/HADLCK">https://doi.org/10.7910/DVN/HADLCK</a>. Harvard Dataverse. Version 1. |
Disclaimer: |
The data files in this dataset are the unit record or ‘raw’ data files. Information that would allow survey respondents to be identified has been deleted from the files, but all other information remains. The user of these files will need to take care in handling missing observations, outliers, and violations of logical consistency. |
Notes: |
If you are interested in accessing restricted datasets, kindly fill out this <a href="https://goo.gl/forms/muJtiDnuwhfAftQ83"> data use agreement form</a>. |
Other Study Description Materials |
|
Related Publications |
|
Citation |
|
Title: |
Reith J.; Dubovky, O.; Muthoni, FK.; Kimaro, A.; Swai, E. Spatial Assessment of Land Degradation in Semi-Arid Zone of Central Tanzania. |
Bibliographic Citation: |
Reith J.; Dubovky, O.; Muthoni, FK.; Kimaro, A.; Swai, E. Spatial Assessment of Land Degradation in Semi-Arid Zone of Central Tanzania. |
File Description--f4414344 |
|
File: landDegradation_SLM_Kongwa.tab |
|
|
|
Notes: |
UNF:6:jU30uW/R5JgiHw7dPr5iuQ== |
List of Variables: |
|
Variables |
|
f4414344 Location: |
Summary Statistics: Valid 34.0; StDev 9.958246164193104; Max. 34.0; Mean 17.5; Min. 1.0; Variable Format: numeric Notes: UNF:6:PHF1dLAAFjEImsfCJLQ4fQ== |
f4414344 Location: |
Variable Format: character Notes: UNF:6:CJRaQdutDm3n0EYzvogsMg== |
f4414344 Location: |
Variable Format: character Notes: UNF:6:8cfkh/cvpmYhSNda76ItTA== |
f4414344 Location: |
Summary Statistics: Max. NaN; Min. NaN; Valid 0.0; StDev NaN; Mean NaN Variable Format: numeric Notes: UNF:6:xBmpLH3OUiVgb2BPedDQcA== |
f4414344 Location: |
Summary Statistics: Min. NaN; StDev NaN; Valid 0.0; Max. NaN; Mean NaN Variable Format: numeric Notes: UNF:6:xBmpLH3OUiVgb2BPedDQcA== |
f4414344 Location: |
Summary Statistics: Max. NaN; StDev NaN; Valid 0.0; Min. NaN; Mean NaN Variable Format: numeric Notes: UNF:6:xBmpLH3OUiVgb2BPedDQcA== |
f4414344 Location: |
Summary Statistics: StDev 137.59280452624515; Valid 34.0; Mean 1186.0882352941176; Max. 1482.0; Min. 898.0; Variable Format: numeric Notes: UNF:6:jze4lrdRYSpkDmAR2NMaXQ== |
f4414344 Location: |
Variable Format: character Notes: UNF:6:YeTUBD5PnCGA/e/Guto3+g== |
f4414344 Location: |
Variable Format: character Notes: UNF:6:MecaodamL29zOBJx93PkBg== |
f4414344 Location: |
Variable Format: character Notes: UNF:6:zME0YZpjzMBCrVp1pK0s7A== |
f4414344 Location: |
Variable Format: character Notes: UNF:6:WoFl2yg1omO3LM9ZULKk6g== |
f4414344 Location: |
Variable Format: character Notes: UNF:6:UCZDo7ALHSK/fcTQ5EZjPQ== |
f4414344 Location: |
Variable Format: character Notes: UNF:6:2mYWHKmWlAPeWRN5fcS+oA== |
f4414344 Location: |
Variable Format: character Notes: UNF:6:U3cqNznHKCp0WqJJRS6Gxg== |
f4414344 Location: |
Summary Statistics: Min. 0.0; Max. 31.0; StDev 6.2813562803062375; Valid 34.0; Mean 2.6176470588235294; Variable Format: numeric Notes: UNF:6:KZasHJp8oa8gfG+0HUg2XA== |
f4414344 Location: |
Summary Statistics: Min. 0.0; StDev 23.66552431276809; Mean 16.941176470588236; Max. 88.0; Valid 34.0; Variable Format: numeric Notes: UNF:6:vTLnrZur5pL9M7LvMnurqw== |
f4414344 Location: |
Summary Statistics: StDev 23.847050513256733; Min. 0.0; Max. 88.0; Valid 34.0; Mean 20.5; Variable Format: numeric Notes: UNF:6:QInoK+qDyhuiQPoTve6j0A== |
f4414344 Location: |
Summary Statistics: Valid 34.0; StDev 25.832726690594328; Mean 68.05882352941177; Max. 100.0; Min. 8.0; Variable Format: numeric Notes: UNF:6:78fXlXepzX1jpkq0jpsB8Q== |
f4414344 Location: |
Summary Statistics: Valid 34.0; StDev 0.38695299497594743; Min. 0.0; Max. 1.0; Mean 0.823529411764706 Variable Format: numeric Notes: UNF:6:co03VyPnCPMkUYhwUvnq6w== |
f4414344 Location: |
Summary Statistics: Max. 1.0; Valid 28.0; StDev 0.47559486560567094; Mean 0.6785714285714285; Min. 0.0 Variable Format: numeric Notes: UNF:6:IhOg6HGOsC4eZ3O3rNzPIA== |
f4414344 Location: |
Summary Statistics: Min. 0.0; Max. 1.0; Mean 0.75; Valid 28.0; StDev 0.44095855184409843; Variable Format: numeric Notes: UNF:6:2qzOHAm78ckgD8IZx4CbQg== |
f4414344 Location: |
Summary Statistics: Min. 0.0; StDev 0.4755948656056709; Mean 0.32142857142857145; Max. 1.0; Valid 28.0 Variable Format: numeric Notes: UNF:6:ULcXdKA65NMLsWgqikZGtw== |
f4414344 Location: |
Summary Statistics: StDev 0.0; Min. 0.0; Mean 0.0; Valid 28.0; Max. 0.0 Variable Format: numeric Notes: UNF:6:pe6jT/h5LJ0yq0P7J6YTww== |
f4414344 Location: |
Summary Statistics: Min. 0.0; StDev 0.0; Valid 28.0; Mean 0.0; Max. 0.0 Variable Format: numeric Notes: UNF:6:pe6jT/h5LJ0yq0P7J6YTww== |
f4414344 Location: |
Summary Statistics: Min. 0.0; Valid 28.0; Max. 1.0; StDev 0.44095855184409843; Mean 0.25; Variable Format: numeric Notes: UNF:6:JlkhLphOO6nlktlw7cgV+A== |
f4414344 Location: |
Summary Statistics: Mean 0.17857142857142855; Min. 0.0; Max. 1.0; StDev 0.3900210277874797; Valid 28.0 Variable Format: numeric Notes: UNF:6:DWvyO+JrTU0mNeiFF0tYDg== |
f4414344 Location: |
Summary Statistics: Valid 29.0; StDev 26.979284152827603; Max. 90.0; Min. 0.0; Mean 30.89655172413793; Variable Format: numeric Notes: UNF:6:N9q0Rj9Wx1jnT8KM3QZvhg== |
f4414344 Location: |
Summary Statistics: Valid 28.0; Min. 0.0; Max. 3.0; Mean 1.7142857142857142; StDev 1.0131411680782823 Variable Format: numeric Notes: UNF:6:DyAWWrZSqQ2/TGhXdBnKPA== |
f4414344 Location: |
Summary Statistics: Min. 0.0; Max. 1.0; StDev 0.5039526306789697; Mean 0.5714285714285714; Valid 28.0; Variable Format: numeric Notes: UNF:6:tRO5oTVyQ2rb1WyfoxY83g== |
f4414344 Location: |
Summary Statistics: Mean 0.07142857142857144; StDev 0.26226526415648094; Min. 0.0; Max. 1.0; Valid 28.0; Variable Format: numeric Notes: UNF:6:knnxKPasEfPZ3W8FNjFc/A== |
f4414344 Location: |
Summary Statistics: Valid 28.0; Max. 1.0; Mean 0.25; Min. 0.0; StDev 0.44095855184409843 Variable Format: numeric Notes: UNF:6:JsdCWvnOb9S85A8+mIoNcw== |
f4414344 Location: |
Summary Statistics: Mean 0.14285714285714288; Max. 1.0; Valid 28.0; StDev 0.35634832254989907; Min. 0.0 Variable Format: numeric Notes: UNF:6:OvHBLqOQ6kmlQPhucZ+OMA== |
f4414344 Location: |
Summary Statistics: Min. 0.0; Valid 28.0; StDev 0.5039526306789697; Max. 1.0; Mean 0.42857142857142855; Variable Format: numeric Notes: UNF:6:NMofE4i+7UfVH6gKLWCbSw== |
f4414344 Location: |
Summary Statistics: Max. 100.0; Min. 0.0; Mean 35.25; StDev 35.95431772350802; Valid 28.0 Variable Format: numeric Notes: UNF:6:TY0d6e2E5r+rkMyBKYspAw== |
f4414344 Location: |
Summary Statistics: Mean 1.4642857142857142; StDev 1.201300001299298; Valid 28.0; Max. 3.0; Min. 0.0 Variable Format: numeric Notes: UNF:6:pB9+zoxcVW28fYy4VifR0Q== |
f4414344 Location: |
Summary Statistics: Max. 1.0; StDev 0.49734746139343816; Mean 0.3928571428571429; Min. 0.0; Valid 28.0; Variable Format: numeric Notes: UNF:6:uaLNsEQAq2pQrifiq/Claw== |
f4414344 Location: |
Summary Statistics: Max. 0.0; Valid 28.0; StDev 0.0; Min. 0.0; Mean 0.0 Variable Format: numeric Notes: UNF:6:pe6jT/h5LJ0yq0P7J6YTww== |
f4414344 Location: |
Summary Statistics: Min. 0.0; StDev 0.0; Valid 28.0; Mean 0.0; Max. 0.0 Variable Format: numeric Notes: UNF:6:pe6jT/h5LJ0yq0P7J6YTww== |
f4414344 Location: |
Summary Statistics: Mean 0.6071428571428571; StDev 0.49734746139343816; Min. 0.0; Max. 1.0; Valid 28.0 Variable Format: numeric Notes: UNF:6:IVFhIhYnUZJ6JxBJxpZvmg== |
f4414344 Location: |
Summary Statistics: Max. 100.0; Min. 0.0; StDev 36.76456987214181; Mean 25.82142857142857; Valid 28.0; Variable Format: numeric Notes: UNF:6:CVJJS6esYrtgVSLYtwYl1g== |
f4414344 Location: |
Summary Statistics: StDev 1.1773883752795367; Valid 28.0; Min. 0.0; Mean 0.8571428571428572; Max. 3.0 Variable Format: numeric Notes: UNF:6:g02T0mAT7XPIW5S6mPa0Mw== |
f4414344 Location: |
Summary Statistics: Min. 0.0; Valid 28.0; Max. 83.0; StDev 25.701584164627448; Mean 35.142857142857146 Variable Format: numeric Notes: UNF:6:1bohBn0dH6Xxb9vaazXHsw== |
f4414344 Location: |
Summary Statistics: Min. 0.0; Valid 28.0; Max. 1.0; StDev 0.5078745001833701; Mean 0.46428571428571425 Variable Format: numeric Notes: UNF:6:D2JQ4yB8566Mt/ssipLqbg== |
f4414344 Location: |
Summary Statistics: Mean 0.32142857142857145; Max. 1.0; StDev 0.4755948656056708; Valid 28.0; Min. 0.0 Variable Format: numeric Notes: UNF:6:pxwT6b7gDqc2nCzfwlEtww== |
f4414344 Location: |
Summary Statistics: Min. 0.0; StDev 0.26226526415648094; Mean 0.07142857142857144; Max. 1.0; Valid 28.0 Variable Format: numeric Notes: UNF:6:7GDOsnDwgVbTFgLTK4JnTw== |
f4414344 Location: |
Summary Statistics: Valid 28.0; StDev 0.44095855184409843; Mean 0.25; Max. 1.0; Min. 0.0; Variable Format: numeric Notes: UNF:6:6MvVf9hfsny5KdT1NoB4zQ== |
f4414344 Location: |
Summary Statistics: Mean 0.7142857142857142; Max. 1.0; Valid 28.0; Min. 0.0; StDev 0.46004370622823615 Variable Format: numeric Notes: UNF:6:SYZVbsMZ3Lp6VC1B+jdqYQ== |
f4414344 Location: |
Summary Statistics: Min. 0.0; Valid 28.0; Max. 1.0; StDev 0.1889822365046137; Mean 0.035714285714285726 Variable Format: numeric Notes: UNF:6:Vr3qbyi6mNzD89hAIs2V2w== |
f4414344 Location: |
Summary Statistics: Valid 28.0; Max. 1.0; Mean 0.25; Min. 0.0; StDev 0.44095855184409843 Variable Format: numeric Notes: UNF:6:n94+zhGDYQs1vkivGS8PLA== |
f4414344 Location: |
Summary Statistics: StDev 0.31497039417435607; Max. 1.0; Mean 0.10714285714285715; Valid 28.0; Min. 0.0 Variable Format: numeric Notes: UNF:6:zLSKEmomAjV++VJOMEHbfw== |
f4414344 Location: |
Summary Statistics: Mean 0.6176470588235294; Valid 34.0; StDev 0.49327021805638166; Max. 1.0; Min. 0.0 Variable Format: numeric Notes: UNF:6:1Rz6G03HLKO0mABtRNKrEg== |
f4414344 Location: |
Summary Statistics: Min. 0.0; Valid 12.0; Max. 1.0; Mean 0.6666666666666666; StDev 0.49236596391733095 Variable Format: numeric Notes: UNF:6:Qm4rlQDTpHWKvmSWq3Le3Q== |
f4414344 Location: |
Summary Statistics: Min. 0.0; Mean 0.0; StDev 0.0; Max. 0.0; Valid 12.0; Variable Format: numeric Notes: UNF:6:1X7Rp4+c9KgO86YF/j8hjg== |
f4414344 Location: |
Summary Statistics: StDev 0.49236596391733095; Max. 1.0; Mean 0.33333333333333337; Valid 12.0; Min. 0.0 Variable Format: numeric Notes: UNF:6:ad0ifm5CAn2ND9hLYQ7QZg== |
f4414344 Location: |
Summary Statistics: StDev 0.0; Valid 12.0; Min. 0.0; Mean 0.0; Max. 0.0 Variable Format: numeric Notes: UNF:6:1X7Rp4+c9KgO86YF/j8hjg== |
f4414344 Location: |
Summary Statistics: Max. 1.0; Mean 0.41666666666666663; Valid 12.0; StDev 0.5149286505444373; Min. 0.0 Variable Format: numeric Notes: UNF:6:biVDHGxXIVxkvP0ZOvx8PA== |
f4414344 Location: |
Summary Statistics: Min. 0.0; Valid 12.0; StDev 0.49236596391733095; Mean 0.6666666666666667; Max. 1.0; Variable Format: numeric Notes: UNF:6:A2pTzC9gqs9FSLdkubB9Cg== |
f4414344 Location: |
Summary Statistics: Mean 0.42857142857142855; Valid 21.0; Min. 0.0; StDev 0.50709255283711; Max. 1.0 Variable Format: numeric Notes: UNF:6:UO/Lw5em+9TLcq9Mcb5lYA== |
f4414344 Location: |
Summary Statistics: Max. 100.0; Mean 67.25; Min. 7.0; Valid 12.0; StDev 31.614510477425913 Variable Format: numeric Notes: UNF:6:N/BjWlZ1BK6CMmIQ/HiQZQ== |
f4414344 Location: |
Summary Statistics: Max. 4.0; Min. 0.0; StDev 1.2154310870109943; Valid 12.0; Mean 2.75 Variable Format: numeric Notes: UNF:6:KtWa316q0PFlAekHMPMPgg== |
f4414344 Location: |
Summary Statistics: StDev 0.48038446141526137; Min. 0.0; Mean 0.3076923076923077; Max. 1.0; Valid 13.0 Variable Format: numeric Notes: UNF:6:NrLiZ5p8GRNH4wDbp6NjSg== |
f4414344 Location: |
Summary Statistics: Valid 13.0; Mean 0.5384615384615384; Max. 1.0; StDev 0.5188745216627708; Min. 0.0; Variable Format: numeric Notes: UNF:6:UtyFl9DhUKm1RUKDxThA2A== |
f4414344 Location: |
Summary Statistics: Max. 1.0; Mean 0.6923076923076923; Valid 13.0; Min. 0.0; StDev 0.48038446141526137; Variable Format: numeric Notes: UNF:6:6/gbMuqLDdkIAbPqXrKiiA== |
f4414344 Location: |
Summary Statistics: Mean 0.5714285714285714; Valid 21.0; StDev 0.50709255283711; Max. 1.0; Min. 0.0 Variable Format: numeric Notes: UNF:6:8bFrqhj1sp/7J4xV5UY8cg== |
f4414344 Location: |
Summary Statistics: Min. 5.0; Max. 90.0; StDev 29.028279756834124; Mean 36.84615384615385; Valid 13.0 Variable Format: numeric Notes: UNF:6:KMAuGncAg/uFtcL9nUn2mQ== |
f4414344 Location: |
Summary Statistics: StDev 1.3008872711759818; Max. 4.0; Mean 1.7692307692307692; Min. 0.0; Valid 13.0; Variable Format: numeric Notes: UNF:6:ZU9sfqfduh1hkcCjJTVJ8w== |
f4414344 Location: |
Summary Statistics: Mean 0.42857142857142855; StDev 0.5345224838248487; Min. 0.0; Valid 7.0; Max. 1.0; Variable Format: numeric Notes: UNF:6:vJKr1JaC1WWGHvKAghXk5g== |
f4414344 Location: |
Summary Statistics: Valid 7.0; Min. 0.0; StDev 0.5345224838248488; Mean 0.5714285714285714; Max. 1.0; Variable Format: numeric Notes: UNF:6:IvAXPN6Ddh+OTNKuWFjiig== |
f4414344 Location: |
Summary Statistics: Valid 7.0; Min. 0.0; Max. 0.0; StDev 0.0; Mean 0.0; Variable Format: numeric Notes: UNF:6:QM85vGgScfrq5ScOB1wI4A== |
f4414344 Location: |
Summary Statistics: Mean 0.7142857142857143; Min. 0.0; StDev 0.46291004988627577; Valid 21.0; Max. 1.0; Variable Format: numeric Notes: UNF:6:JsZgIlx1LU7Fj6C4Os0iHA== |
f4414344 Location: |
Summary Statistics: Max. 100.0; StDev 38.53075456851381; Min. 17.0; Mean 69.57142857142857; Valid 7.0 Variable Format: numeric Notes: UNF:6:b0+ipaamlV3RwnnAOUVgIQ== |
f4414344 Location: |
Summary Statistics: StDev 1.1126972805283737; Valid 7.0; Min. 0.0; Max. 3.0; Mean 2.2857142857142856 Variable Format: numeric Notes: UNF:6:9MZQ79orlikahcpnSiakfQ== |
f4414344 Location: |
Summary Statistics: Valid 21.0; Max. 83.0; StDev 27.170975410571938; Mean 29.476190476190478; Min. 0.0; Variable Format: numeric Notes: UNF:6:pJdN2uiYioi6/KpBnV1aug== |
Label: |
Field_protocol.pdf |
Notes: |
application/pdf |