This report describes standardized data for “Assessment of the performance of improved varieties in different countries, using Uniform Yield Trial (23 clones) in Ibadan, Nigeria, 2008/2009 Breeding season”. These data were standardized on 2024-09-18 by Robert Hijmans with this R script. The original data have a CC-BY license. Here you can download the standardized data.

This is the full citation of the data set:

Kulakow, Peter; Ismail Rabbi; Elizabeth Parkes; Chiedozie Egesi; Olufemi Aina; Prasad Peteti; Agbona Afolabi (2020). Assessment of the performance of improved varieties in different countries, using Uniform Yield Trial (23 clones) in Ibadan, Nigeria, 2008/2009 Breeding season. International Institute of Tropical Agriculture (IITA). Not versioned. doi:10.25502/0NNK-DV36

The dataset has 92 records and 29 variables for cassava in Nigeria. The dataset has 1 treatment(s): variety.


These are the first 25 records:

records
country location longitude latitude geo_from_source trial_id planting_date harvest_date on_farm is_survey rep crop variety variety_alt variety_code dmy_storage fwy_storage fwy_residue yield_part yield N_fertilizer P_fertilizer K_fertilizer irrigated plot_length plot_width harvest_index
Nigeria Ibadan 3.94704 7.37754 TRUE 08uyt23ICT1ib 2008 NA FALSE FALSE 1 cassava IITA-TMS-IBA010040 NA 4838 7.465500 19750.0 NA roots 19750.0 NA NA NA NA NA NA 0.6638655
Nigeria Ibadan 3.94704 7.37754 TRUE 08uyt23ICT1ib 2008 NA FALSE FALSE 1 cassava IITA-TMS-IBA010046 NA 4842 3.542625 8812.5 NA roots 8812.5 NA NA NA NA NA NA 0.5402299
Nigeria Ibadan 3.94704 7.37754 TRUE 08uyt23ICT1ib 2008 NA FALSE FALSE 1 cassava IITA-TMS-IBA010085 NA 4844 4.602000 13000.0 NA roots 13000.0 NA NA NA NA NA NA 0.5388601
Nigeria Ibadan 3.94704 7.37754 TRUE 08uyt23ICT1ib 2008 NA FALSE FALSE 1 cassava IITA-TMS-IBA010093 NA 4848 5.890500 16500.0 NA roots 16500.0 NA NA NA NA NA NA 0.5879733
Nigeria Ibadan 3.94704 7.37754 TRUE 08uyt23ICT1ib 2008 NA FALSE FALSE 1 cassava IITA-TMS-IBA010098 NA 4850 5.985000 19687.5 NA roots 19687.5 NA NA NA NA NA NA 0.6548857
Nigeria Ibadan 3.94704 7.37754 TRUE 08uyt23ICT1ib 2008 NA FALSE FALSE 1 cassava IITA-TMS-IBA010103 NA 4852 3.881687 10812.5 NA roots 10812.5 NA NA NA NA NA NA 0.6837945
Nigeria Ibadan 3.94704 7.37754 TRUE 08uyt23ICT1ib 2008 NA FALSE FALSE 1 cassava IITA-TMS-IBA010131 NA 4854 6.570000 22500.0 NA roots 22500.0 NA NA NA NA NA NA 0.6617647
Nigeria Ibadan 3.94704 7.37754 TRUE 08uyt23ICT1ib 2008 NA FALSE FALSE 1 cassava IITA-TMS-IBA010134 NA 4856 3.257875 8375.0 NA roots 8375.0 NA NA NA NA NA NA 0.4466667
Nigeria Ibadan 3.94704 7.37754 TRUE 08uyt23ICT1ib 2008 NA FALSE FALSE 1 cassava IITA-TMS-IBA010169 NA 4859 3.720875 12875.0 NA roots 12875.0 NA NA NA NA NA NA 0.5852273
Nigeria Ibadan 3.94704 7.37754 TRUE 08uyt23ICT1ib 2008 NA FALSE FALSE 1 cassava IITA-TMS-IBA011086 NA 4896 12.180000 36250.0 NA roots 36250.0 NA NA NA NA NA NA 0.6444444
Nigeria Ibadan 3.94704 7.37754 TRUE 08uyt23ICT1ib 2008 NA FALSE FALSE 1 cassava IITA-TMS-IBA011097 NA 4898 5.513625 14625.0 NA roots 14625.0 NA NA NA NA NA NA 0.6902655
Nigeria Ibadan 3.94704 7.37754 TRUE 08uyt23ICT1ib 2008 NA FALSE FALSE 1 cassava IITA-TMS-IBA020540 NA 22495 12.584000 35750.0 NA roots 35750.0 NA NA NA NA NA NA 0.7606383
Nigeria Ibadan 3.94704 7.37754 TRUE 08uyt23ICT1ib 2008 NA FALSE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 5.343750 14062.5 NA roots 14062.5 NA NA NA NA NA NA 0.6446991
Nigeria Ibadan 3.94704 7.37754 TRUE 08uyt23ICT1ib 2008 NA FALSE FALSE 1 cassava IITA-TMS-IBA950211 NA 1533 4.175250 14250.0 NA roots 14250.0 NA NA NA NA NA NA 0.6458924
Nigeria Ibadan 3.94704 7.37754 TRUE 08uyt23ICT1ib 2008 NA FALSE FALSE 1 cassava IITA-TMS-IBA961708 NA 31 NA NA NA roots NA NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 08uyt23ICT1ib 2008 NA FALSE FALSE 1 cassava IITA-TMS-IBA990240 NA 1680 2.039625 6125.0 NA roots 6125.0 NA NA NA NA NA NA 0.5355191
Nigeria Ibadan 3.94704 7.37754 TRUE 08uyt23ICT1ib 2008 NA FALSE FALSE 1 cassava IITA-TMS-IBA990554 NA 1694 8.431250 23750.0 NA roots 23750.0 NA NA NA NA NA NA 0.5937500
Nigeria Ibadan 3.94704 7.37754 TRUE 08uyt23ICT1ib 2008 NA FALSE FALSE 1 cassava IITA-TMS-MM961751 NA 1776 0.618000 2000.0 NA roots 2000.0 NA NA NA NA NA NA 0.4102564
Nigeria Ibadan 3.94704 7.37754 TRUE 08uyt23ICT1ib 2008 NA FALSE FALSE 1 cassava IITA-TMS-MM965280 NA 1785 NA NA NA roots NA NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 08uyt23ICT1ib 2008 NA FALSE FALSE 1 cassava IITA-TMS-MM96JW1 NA 75208 2.767500 6750.0 NA roots 6750.0 NA NA NA NA NA NA 0.3506494
Nigeria Ibadan 3.94704 7.37754 TRUE 08uyt23ICT1ib 2008 NA FALSE FALSE 1 cassava IITA-TMS-MM97JW2 NA 75207 2.289000 7000.0 NA roots 7000.0 NA NA NA NA NA NA 0.7179487
Nigeria Ibadan 3.94704 7.37754 TRUE 08uyt23ICT1ib 2008 NA FALSE FALSE 1 cassava TMEB1 NA 39629 NA 125.0 NA roots 125.0 NA NA NA NA NA NA 0.1666667
Nigeria Ibadan 3.94704 7.37754 TRUE 08uyt23ICT1ib 2008 NA FALSE FALSE 1 cassava TMEB419 NA 39671 1.606500 6750.0 NA roots 6750.0 NA NA NA NA NA NA 0.3292683
Nigeria Ibadan 3.94704 7.37754 TRUE 08uyt23ICT1ib 2008 NA FALSE FALSE 2 cassava IITA-TMS-IBA010040 NA 4838 6.059625 17875.0 NA roots 17875.0 NA NA NA NA NA NA 0.6059322
Nigeria Ibadan 3.94704 7.37754 TRUE 08uyt23ICT1ib 2008 NA FALSE FALSE 2 cassava IITA-TMS-IBA010046 NA 4842 2.508000 7125.0 NA roots 7125.0 NA NA NA NA NA NA 0.5480769


The observations are for 1 locations, for which we have 1 unique mapped locations.


The standardization script emits the following non-compliance warnings.

message
yield

The overall quality of the dataset, given the completeness of required variables was 4.4 on a scale of 10. See the table below

variable completeness (%)
planting_date 100
harvest_date 0
N_fertilizer 0
P_fertilizer 0
K_fertilizer 0
irrigated 0
latitude 100
longitude 100
location 100


The data are further summarized in the table below.

Variable Stats / Values Freqs (% of Valid) Graph Missing
country [character] 1. Nigeria
92(100.0%)
 0 (0.0%)
location [character] 1. Ibadan
92(100.0%)
 0 (0.0%)
geo_from_source [logical] 1. TRUE
92(100.0%)
 0 (0.0%)
trial_id [character] 1. 08uyt23ICT1ib
92(100.0%)
 0 (0.0%)
planting_date [integer] 1 distinct value
2008:92(100.0%)
 0 (0.0%)
harvest_date [logical]
All NA's
 92 (100.0%)
on_farm [logical] 1. FALSE
92(100.0%)
 0 (0.0%)
is_survey [logical] 1. FALSE
92(100.0%)
 0 (0.0%)
rep [integer]
Mean (sd) : 2.5 (1.1)
min ≤ med ≤ max:
1 ≤ 2.5 ≤ 4
IQR (CV) : 1.5 (0.4)
1:23(25.0%)
2:23(25.0%)
3:23(25.0%)
4:23(25.0%)
 0 (0.0%)
crop [character] 1. cassava
92(100.0%)
 0 (0.0%)
variety [character]
1. IITA-TMS-IBA010040
2. IITA-TMS-IBA010046
3. IITA-TMS-IBA010085
4. IITA-TMS-IBA010093
5. IITA-TMS-IBA010098
6. IITA-TMS-IBA010103
7. IITA-TMS-IBA010131
8. IITA-TMS-IBA010134
9. IITA-TMS-IBA010169
10. IITA-TMS-IBA011086
[ 13 others ]
4(4.3%)
4(4.3%)
4(4.3%)
4(4.3%)
4(4.3%)
4(4.3%)
4(4.3%)
4(4.3%)
4(4.3%)
4(4.3%)
52(56.5%)
 0 (0.0%)
variety_alt [logical]
All NA's
 92 (100.0%)
variety_code [integer]
Mean (sd) : 13658.7 (21934.6)
min ≤ med ≤ max:
5 ≤ 4850 ≤ 75208
IQR (CV) : 3122 (1.6)
 23 distinct values 0 (0.0%)
dmy_storage [numeric]
Mean (sd) : 5.9 (3.3)
min ≤ med ≤ max:
0.4 ≤ 5.8 ≤ 13.9
IQR (CV) : 4.6 (0.6)
 76 distinct values 16 (17.4%)
fwy_storage [numeric]
Mean (sd) : 16742.8 (9205.9)
min ≤ med ≤ max:
125 ≤ 17187.5 ≤ 36375
IQR (CV) : 14421.9 (0.5)
 70 distinct values 14 (15.2%)
fwy_residue [logical]
All NA's
 92 (100.0%)
yield_part [character] 1. roots
92(100.0%)
 0 (0.0%)
yield [numeric]
Mean (sd) : 16742.8 (9205.9)
min ≤ med ≤ max:
125 ≤ 17187.5 ≤ 36375
IQR (CV) : 14421.9 (0.5)
 70 distinct values 14 (15.2%)
N_fertilizer [logical]
All NA's
 92 (100.0%)
P_fertilizer [logical]
All NA's
 92 (100.0%)
K_fertilizer [logical]
All NA's
 92 (100.0%)
irrigated [logical]
All NA's
 92 (100.0%)
plot_length [logical]
All NA's
 92 (100.0%)
plot_width [logical]
All NA's
 92 (100.0%)
harvest_index [numeric]
Mean (sd) : 0.6 (0.1)
min ≤ med ≤ max:
0.2 ≤ 0.6 ≤ 0.8
IQR (CV) : 0.1 (0.2)
 42 distinct values 49 (53.3%)