This report describes standardized data for “Assessment of Varieties of Cassava for high dry matter and disease resistance in an Advanced Yield Trial (14 clones) in Ibadan 2018/2019 Breeding Season from 17ayt19pd and 17ayt16pd trials”. 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 (2019). Assessment of Varieties of Cassava for high dry matter and disease resistance in an Advanced Yield Trial (14 clones) in Ibadan 2018/2019 Breeding Season from 17ayt19pd and 17ayt16pd trials. International Institute of Tropical Agriculture (IITA). Not versioned. doi:10.25502/NV1Z-S906

The dataset has 42 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 18ayt14wrthighDMIB 2018-10-31 2019-10-31 FALSE FALSE 1 cassava IITA-TMS-IBA070337 NA 31142 8.81 23750 2045.4545 roots 23750 NA NA NA NA 5.5 4 0.30
Nigeria Ibadan 3.94704 7.37754 TRUE 18ayt14wrthighDMIB 2018-10-31 2019-10-31 FALSE FALSE 1 cassava IITA-TMS-IBA140697 NA 405612 11.57 29380 1545.4545 roots 29380 NA NA NA NA 5.5 4 0.41
Nigeria Ibadan 3.94704 7.37754 TRUE 18ayt14wrthighDMIB 2018-10-31 2019-10-31 FALSE FALSE 1 cassava IITA-TMS-IBA140802 NA 405717 11.02 25630 1590.9091 roots 25630 NA NA NA NA 5.5 4 0.37
Nigeria Ibadan 3.94704 7.37754 TRUE 18ayt14wrthighDMIB 2018-10-31 2019-10-31 FALSE FALSE 1 cassava IITA-TMS-IBA140893 NA 405808 4.54 10630 1500.0000 roots 10630 NA NA NA NA 5.5 4 0.20
Nigeria Ibadan 3.94704 7.37754 TRUE 18ayt14wrthighDMIB 2018-10-31 2019-10-31 FALSE FALSE 1 cassava IITA-TMS-IBA164521 NA 552600 6.45 16250 1136.3636 roots 16250 NA NA NA NA 5.5 4 0.34
Nigeria Ibadan 3.94704 7.37754 TRUE 18ayt14wrthighDMIB 2018-10-31 2019-10-31 FALSE FALSE 1 cassava IITA-TMS-IBA164525 NA 552608 9.48 21250 1136.3636 roots 21250 NA NA NA NA 5.5 4 0.40
Nigeria Ibadan 3.94704 7.37754 TRUE 18ayt14wrthighDMIB 2018-10-31 2019-10-31 FALSE FALSE 1 cassava IITA-TMS-IBA164528 NA 552607 6.47 16250 1136.3636 roots 16250 NA NA NA NA 5.5 4 0.34
Nigeria Ibadan 3.94704 7.37754 TRUE 18ayt14wrthighDMIB 2018-10-31 2019-10-31 FALSE FALSE 1 cassava IITA-TMS-IBA164540 NA 552605 4.50 11250 1363.6364 roots 11250 NA NA NA NA 5.5 4 0.23
Nigeria Ibadan 3.94704 7.37754 TRUE 18ayt14wrthighDMIB 2018-10-31 2019-10-31 FALSE FALSE 1 cassava IITA-TMS-IBA164542 NA 552597 8.42 20000 1363.6364 roots 20000 NA NA NA NA 5.5 4 0.35
Nigeria Ibadan 3.94704 7.37754 TRUE 18ayt14wrthighDMIB 2018-10-31 2019-10-31 FALSE FALSE 1 cassava IITA-TMS-IBA164808 NA 551916 12.74 28130 1000.0000 roots 28130 NA NA NA NA 5.5 4 0.51
Nigeria Ibadan 3.94704 7.37754 TRUE 18ayt14wrthighDMIB 2018-10-31 2019-10-31 FALSE FALSE 1 cassava IITA-TMS-IBA164811 NA 551908 4.66 11250 1227.2727 roots 11250 NA NA NA NA 5.5 4 0.25
Nigeria Ibadan 3.94704 7.37754 TRUE 18ayt14wrthighDMIB 2018-10-31 2019-10-31 FALSE FALSE 1 cassava IITA-TMS-IBA164812 NA 551907 8.66 21500 1590.9091 roots 21500 NA NA NA NA 5.5 4 0.33
Nigeria Ibadan 3.94704 7.37754 TRUE 18ayt14wrthighDMIB 2018-10-31 2019-10-31 FALSE FALSE 1 cassava IITA-TMS-IBA961632 NA 665 5.31 16250 1136.3636 roots 16250 NA NA NA NA 5.5 4 0.34
Nigeria Ibadan 3.94704 7.37754 TRUE 18ayt14wrthighDMIB 2018-10-31 2019-10-31 FALSE FALSE 1 cassava IITA-TMS-IBA980581 NA 723 7.65 20630 1954.5455 roots 20630 NA NA NA NA 5.5 4 0.28
Nigeria Ibadan 3.94704 7.37754 TRUE 18ayt14wrthighDMIB 2018-10-31 2019-10-31 FALSE FALSE 2 cassava IITA-TMS-IBA070337 NA 31142 4.86 13130 1954.5455 roots 13130 NA NA NA NA 5.5 4 0.20
Nigeria Ibadan 3.94704 7.37754 TRUE 18ayt14wrthighDMIB 2018-10-31 2019-10-31 FALSE FALSE 2 cassava IITA-TMS-IBA140697 NA 405612 6.34 18130 1000.0000 roots 18130 NA NA NA NA 5.5 4 0.40
Nigeria Ibadan 3.94704 7.37754 TRUE 18ayt14wrthighDMIB 2018-10-31 2019-10-31 FALSE FALSE 2 cassava IITA-TMS-IBA140802 NA 405717 8.00 19380 681.8182 roots 19380 NA NA NA NA 5.5 4 0.51
Nigeria Ibadan 3.94704 7.37754 TRUE 18ayt14wrthighDMIB 2018-10-31 2019-10-31 FALSE FALSE 2 cassava IITA-TMS-IBA140893 NA 405808 5.88 13130 1227.2727 roots 13130 NA NA NA NA 5.5 4 0.28
Nigeria Ibadan 3.94704 7.37754 TRUE 18ayt14wrthighDMIB 2018-10-31 2019-10-31 FALSE FALSE 2 cassava IITA-TMS-IBA164521 NA 552600 6.01 14250 1000.0000 roots 14250 NA NA NA NA 5.5 4 0.34
Nigeria Ibadan 3.94704 7.37754 TRUE 18ayt14wrthighDMIB 2018-10-31 2019-10-31 FALSE FALSE 2 cassava IITA-TMS-IBA164525 NA 552608 8.23 20630 1500.0000 roots 20630 NA NA NA NA 5.5 4 0.33
Nigeria Ibadan 3.94704 7.37754 TRUE 18ayt14wrthighDMIB 2018-10-31 2019-10-31 FALSE FALSE 2 cassava IITA-TMS-IBA164528 NA 552607 8.88 21250 1681.8182 roots 21250 NA NA NA NA 5.5 4 0.31
Nigeria Ibadan 3.94704 7.37754 TRUE 18ayt14wrthighDMIB 2018-10-31 2019-10-31 FALSE FALSE 2 cassava IITA-TMS-IBA164540 NA 552605 9.52 22500 1500.0000 roots 22500 NA NA NA NA 5.5 4 0.35
Nigeria Ibadan 3.94704 7.37754 TRUE 18ayt14wrthighDMIB 2018-10-31 2019-10-31 FALSE FALSE 2 cassava IITA-TMS-IBA164542 NA 552597 7.84 18750 1227.2727 roots 18750 NA NA NA NA 5.5 4 0.36
Nigeria Ibadan 3.94704 7.37754 TRUE 18ayt14wrthighDMIB 2018-10-31 2019-10-31 FALSE FALSE 2 cassava IITA-TMS-IBA164808 NA 551916 12.72 30000 909.0909 roots 30000 NA NA NA NA 5.5 4 0.55
Nigeria Ibadan 3.94704 7.37754 TRUE 18ayt14wrthighDMIB 2018-10-31 2019-10-31 FALSE FALSE 2 cassava IITA-TMS-IBA164811 NA 551908 6.83 16880 1727.2727 roots 16880 NA NA NA NA 5.5 4 0.26


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


The standardization script does not emit non-compliance warnings.

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
42(100.0%)
 0 (0.0%)
location [character] 1. Ibadan
42(100.0%)
 0 (0.0%)
geo_from_source [logical] 1. TRUE
42(100.0%)
 0 (0.0%)
trial_id [character] 1. 18ayt14wrthighDMIB
42(100.0%)
 0 (0.0%)
planting_date [character] 1. 2018-10-31
42(100.0%)
 0 (0.0%)
harvest_date [character] 1. 2019-10-31
42(100.0%)
 0 (0.0%)
on_farm [logical] 1. FALSE
42(100.0%)
 0 (0.0%)
is_survey [logical] 1. FALSE
42(100.0%)
 0 (0.0%)
rep [integer]
Mean (sd) : 2 (0.8)
min ≤ med ≤ max:
1 ≤ 2 ≤ 3
IQR (CV) : 2 (0.4)
1:14(33.3%)
2:14(33.3%)
3:14(33.3%)
 0 (0.0%)
crop [character] 1. cassava
42(100.0%)
 0 (0.0%)
variety [character]
1. IITA-TMS-IBA070337
2. IITA-TMS-IBA140697
3. IITA-TMS-IBA140802
4. IITA-TMS-IBA140893
5. IITA-TMS-IBA164521
6. IITA-TMS-IBA164525
7. IITA-TMS-IBA164528
8. IITA-TMS-IBA164540
9. IITA-TMS-IBA164542
10. IITA-TMS-IBA164808
[ 4 others ]
3(7.1%)
3(7.1%)
3(7.1%)
3(7.1%)
3(7.1%)
3(7.1%)
3(7.1%)
3(7.1%)
3(7.1%)
3(7.1%)
12(28.6%)
 0 (0.0%)
variety_alt [logical]
All NA's
 42 (100.0%)
variety_code [integer]
Mean (sd) : 404886.8 (216464.9)
min ≤ med ≤ max:
665 ≤ 551907.5 ≤ 552608
IQR (CV) : 146988 (0.5)
 14 distinct values 0 (0.0%)
dmy_storage [numeric]
Mean (sd) : 7.7 (2.3)
min ≤ med ≤ max:
1.8 ≤ 7.9 ≤ 12.7
IQR (CV) : 2.5 (0.3)
 40 distinct values 0 (0.0%)
fwy_storage [integer]
Mean (sd) : 19023.8 (5322)
min ≤ med ≤ max:
5000 ≤ 19380 ≤ 30000
IQR (CV) : 5000 (0.3)
 23 distinct values 0 (0.0%)
fwy_residue [numeric]
Mean (sd) : 1357.3 (390.8)
min ≤ med ≤ max:
454.5 ≤ 1363.6 ≤ 2045.5
IQR (CV) : 454.5 (0.3)
 21 distinct values 0 (0.0%)
yield_part [character] 1. roots
42(100.0%)
 0 (0.0%)
yield [integer]
Mean (sd) : 19023.8 (5322)
min ≤ med ≤ max:
5000 ≤ 19380 ≤ 30000
IQR (CV) : 5000 (0.3)
 23 distinct values 0 (0.0%)
N_fertilizer [logical]
All NA's
 42 (100.0%)
P_fertilizer [logical]
All NA's
 42 (100.0%)
K_fertilizer [logical]
All NA's
 42 (100.0%)
irrigated [logical]
All NA's
 42 (100.0%)
plot_length [numeric] 1 distinct value
5.50:42(100.0%)
 0 (0.0%)
plot_width [integer] 1 distinct value
4:42(100.0%)
 0 (0.0%)
harvest_index [numeric]
Mean (sd) : 0.3 (0.1)
min ≤ med ≤ max:
0.2 ≤ 0.3 ≤ 0.6
IQR (CV) : 0.1 (0.3)
 24 distinct values 0 (0.0%)