This report describes standardized data for “Assessment of Varieties of Cassava for high yield, disease resistance and high total carotenoid retention in an Preliminary Yield Trial (25 clones) in Ibadan 2017/2018 Breeding Season from 2016 clonal evaluation set a ibadan”. 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 (2018). Assessment of Varieties of Cassava for high yield, disease resistance and high total carotenoid retention in an Preliminary Yield Trial (25 clones) in Ibadan 2017/2018 Breeding Season from 2016 clonal evaluation set a ibadan. International Institute of Tropical Agriculture (IITA). Not versioned. doi:10.25502/WJ84-F032

The dataset has 50 records and 28 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 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 17pyt25HTCIB 2017-04-28 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA070539 NA 29531 36000 5250 roots 36000 NA NA NA NA 4 1 0.41
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt25HTCIB 2017-04-28 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA070593 NA 29557 46500 4000 roots 46500 NA NA NA NA 4 1 0.54
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt25HTCIB 2017-04-28 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA141092 NA 398035 35500 4000 roots 35500 NA NA NA NA 4 1 0.47
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt25HTCIB 2017-04-28 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA170039 NA 706831 NA NA roots NA NA NA NA NA 4 1 NA
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt25HTCIB 2017-04-28 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA170040 NA 706832 11500 1350 roots 11500 NA NA NA NA 4 1 0.46
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt25HTCIB 2017-04-28 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA170041 NA 706833 1000 300 roots 1000 NA NA NA NA 4 1 0.25
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt25HTCIB 2017-04-28 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA170042 NA 706834 4500 1850 roots 4500 NA NA NA NA 4 1 0.20
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt25HTCIB 2017-04-28 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA170043 NA 706835 2500 550 roots 2500 NA NA NA NA 4 1 0.31
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt25HTCIB 2017-04-28 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA170044 NA 706836 NA NA roots NA NA NA NA NA 4 1 NA
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt25HTCIB 2017-04-28 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA170045 NA 706837 0 150 roots 0 NA NA NA NA 4 1 0.00
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt25HTCIB 2017-04-28 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA170046 NA 706838 41500 6050 roots 41500 NA NA NA NA 4 1 0.41
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt25HTCIB 2017-04-28 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA170047 NA 706839 9000 950 roots 9000 NA NA NA NA 4 1 0.49
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt25HTCIB 2017-04-28 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA170048 NA 706840 26500 3300 roots 26500 NA NA NA NA 4 1 0.45
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt25HTCIB 2017-04-28 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA170049 NA 706841 4000 NA roots 4000 NA NA NA NA 4 1 1.00
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt25HTCIB 2017-04-28 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA170050 NA 706842 NA NA roots NA NA NA NA NA 4 1 NA
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt25HTCIB 2017-04-28 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA170051 NA 706843 6000 900 roots 6000 NA NA NA NA 4 1 0.40
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt25HTCIB 2017-04-28 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA170052 NA 706844 NA NA roots NA NA NA NA NA 4 1 NA
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt25HTCIB 2017-04-28 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA170053 NA 706845 9500 1850 roots 9500 NA NA NA NA 4 1 0.34
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt25HTCIB 2017-04-28 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA170054 NA 706846 2500 250 roots 2500 NA NA NA NA 4 1 0.50
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt25HTCIB 2017-04-28 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA170055 NA 706847 3000 1000 roots 3000 NA NA NA NA 4 1 0.23
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt25HTCIB 2017-04-28 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA170056 NA 706848 NA NA roots NA NA NA NA NA 4 1 NA
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt25HTCIB 2017-04-28 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA170057 NA 706849 7500 2550 roots 7500 NA NA NA NA 4 1 0.23
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt25HTCIB 2017-04-28 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA170058 NA 706850 NA NA roots NA NA NA NA NA 4 1 NA
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt25HTCIB 2017-04-28 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA170059 NA 706851 34500 4650 roots 34500 NA NA NA NA 4 1 0.43
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt25HTCIB 2017-04-28 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA170060 NA 706852 8500 750 roots 8500 NA NA NA NA 4 1 0.53


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
fwy_storage (0, 54000)
50 harvest_date more than 366 days after planting_date

The overall quality of the dataset, given the completeness of required variables was 5.6 on a scale of 10. See the table below

variable completeness (%)
planting_date 100
harvest_date 100
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
50(100.0%)
 0 (0.0%)
location [character] 1. Ibadan
50(100.0%)
 0 (0.0%)
geo_from_source [logical] 1. TRUE
50(100.0%)
 0 (0.0%)
trial_id [character] 1. 17pyt25HTCIB
50(100.0%)
 0 (0.0%)
planting_date [character] 1. 2017-04-28
50(100.0%)
 0 (0.0%)
harvest_date [character] 1. 2018-05-14
50(100.0%)
 0 (0.0%)
on_farm [logical] 1. FALSE
50(100.0%)
 0 (0.0%)
is_survey [logical] 1. FALSE
50(100.0%)
 0 (0.0%)
rep [integer]
Min : 1
Mean : 1.5
Max : 2
1:25(50.0%)
2:25(50.0%)
 0 (0.0%)
crop [character] 1. cassava
50(100.0%)
 0 (0.0%)
variety [character]
1. IITA-TMS-IBA070539
2. IITA-TMS-IBA070593
3. IITA-TMS-IBA141092
4. IITA-TMS-IBA170039
5. IITA-TMS-IBA170040
6. IITA-TMS-IBA170041
7. IITA-TMS-IBA170042
8. IITA-TMS-IBA170043
9. IITA-TMS-IBA170044
10. IITA-TMS-IBA170045
[ 15 others ]
2(4.0%)
2(4.0%)
2(4.0%)
2(4.0%)
2(4.0%)
2(4.0%)
2(4.0%)
2(4.0%)
2(4.0%)
2(4.0%)
30(60.0%)
 0 (0.0%)
variety_alt [logical]
All NA's
 50 (100.0%)
variety_code [integer]
Mean (sd) : 640305.4 (191891.7)
min ≤ med ≤ max:
29531 ≤ 706840 ≤ 706852
IQR (CV) : 12 (0.3)
 25 distinct values 0 (0.0%)
fwy_storage [integer]
Mean (sd) : 15638.9 (16897.8)
min ≤ med ≤ max:
0 ≤ 7750 ≤ 54000
IQR (CV) : 25500 (1.1)
 28 distinct values 14 (28.0%)
fwy_residue [integer]
Mean (sd) : 2170 (1999.4)
min ≤ med ≤ max:
150 ≤ 1300 ≤ 7300
IQR (CV) : 2900 (0.9)
 28 distinct values 15 (30.0%)
yield_part [character] 1. roots
50(100.0%)
 0 (0.0%)
yield [integer]
Mean (sd) : 15638.9 (16897.8)
min ≤ med ≤ max:
0 ≤ 7750 ≤ 54000
IQR (CV) : 25500 (1.1)
 28 distinct values 14 (28.0%)
N_fertilizer [logical]
All NA's
 50 (100.0%)
P_fertilizer [logical]
All NA's
 50 (100.0%)
K_fertilizer [logical]
All NA's
 50 (100.0%)
irrigated [logical]
All NA's
 50 (100.0%)
plot_length [integer] 1 distinct value
4:50(100.0%)
 0 (0.0%)
plot_width [integer] 1 distinct value
1:50(100.0%)
 0 (0.0%)
harvest_index [numeric]
Mean (sd) : 0.4 (0.2)
min ≤ med ≤ max:
0 ≤ 0.4 ≤ 1
IQR (CV) : 0.2 (0.5)
 25 distinct values 14 (28.0%)