This report describes standardized data for “Assessment of forty two (42) clones selected from 2017/18 clonal evaluation trial harvested in Ibadan for yield and disease”. 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 forty two (42) clones selected from 2017/18 clonal evaluation trial harvested in Ibadan for yield and disease. International Institute of Tropical Agriculture (IITA). Not versioned. doi:10.25502/2XK5-PP51

The dataset has 84 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 18pyt42highyldIB 2018-05-07 2019-05-07 FALSE FALSE 1 cassava IITA-TMS-IBA070337 NA 31142 5.6 20000 1875.0 roots 20000 NA NA NA NA 8 1 0.5
Nigeria Ibadan 3.94704 7.37754 TRUE 18pyt42highyldIB 2018-05-07 2019-05-07 FALSE FALSE 1 cassava IITA-TMS-IBA070539 NA 29531 0.7 5600 625.0 roots 5600 NA NA NA NA 8 1 0.5
Nigeria Ibadan 3.94704 7.37754 TRUE 18pyt42highyldIB 2018-05-07 2019-05-07 FALSE FALSE 1 cassava IITA-TMS-IBA070593 NA 29557 2.0 10600 1500.0 roots 10600 NA NA NA NA 8 1 0.4
Nigeria Ibadan 3.94704 7.37754 TRUE 18pyt42highyldIB 2018-05-07 2019-05-07 FALSE FALSE 1 cassava IITA-TMS-IBA170112 NA 734936 0.8 3100 312.5 roots 3100 NA NA NA NA 8 1 0.5
Nigeria Ibadan 3.94704 7.37754 TRUE 18pyt42highyldIB 2018-05-07 2019-05-07 FALSE FALSE 1 cassava IITA-TMS-IBA170114 NA 734938 6.6 31300 3812.5 roots 31300 NA NA NA NA 8 1 0.5
Nigeria Ibadan 3.94704 7.37754 TRUE 18pyt42highyldIB 2018-05-07 2019-05-07 FALSE FALSE 1 cassava IITA-TMS-IBA170117 NA 734941 6.9 27500 1875.0 roots 27500 NA NA NA NA 8 1 0.6
Nigeria Ibadan 3.94704 7.37754 TRUE 18pyt42highyldIB 2018-05-07 2019-05-07 FALSE FALSE 1 cassava IITA-TMS-IBA170119 NA 734943 3.8 21300 1625.0 roots 21300 NA NA NA NA 8 1 0.6
Nigeria Ibadan 3.94704 7.37754 TRUE 18pyt42highyldIB 2018-05-07 2019-05-07 FALSE FALSE 1 cassava IITA-TMS-IBA170123 NA 734947 5.4 36300 2812.5 roots 36300 NA NA NA NA 8 1 0.6
Nigeria Ibadan 3.94704 7.37754 TRUE 18pyt42highyldIB 2018-05-07 2019-05-07 FALSE FALSE 1 cassava IITA-TMS-IBA170126 NA 734950 3.1 20600 1500.0 roots 20600 NA NA NA NA 8 1 0.6
Nigeria Ibadan 3.94704 7.37754 TRUE 18pyt42highyldIB 2018-05-07 2019-05-07 FALSE FALSE 1 cassava IITA-TMS-IBA170164 NA 734988 8.0 33100 3125.0 roots 33100 NA NA NA NA 8 1 0.5
Nigeria Ibadan 3.94704 7.37754 TRUE 18pyt42highyldIB 2018-05-07 2019-05-07 FALSE FALSE 1 cassava IITA-TMS-IBA170201 NA 735138 NA 1300 187.5 roots 1300 NA NA NA NA 8 1 0.4
Nigeria Ibadan 3.94704 7.37754 TRUE 18pyt42highyldIB 2018-05-07 2019-05-07 FALSE FALSE 1 cassava IITA-TMS-IBA170225 NA 735162 3.6 13800 2187.5 roots 13800 NA NA NA NA 8 1 0.4
Nigeria Ibadan 3.94704 7.37754 TRUE 18pyt42highyldIB 2018-05-07 2019-05-07 FALSE FALSE 1 cassava IITA-TMS-IBA170228 NA 734997 5.9 31300 5625.0 roots 31300 NA NA NA NA 8 1 0.4
Nigeria Ibadan 3.94704 7.37754 TRUE 18pyt42highyldIB 2018-05-07 2019-05-07 FALSE FALSE 1 cassava IITA-TMS-IBA170237 NA 735006 4.7 26300 2437.5 roots 26300 NA NA NA NA 8 1 0.5
Nigeria Ibadan 3.94704 7.37754 TRUE 18pyt42highyldIB 2018-05-07 2019-05-07 FALSE FALSE 1 cassava IITA-TMS-IBA170245 NA 735014 2.9 19400 3250.0 roots 19400 NA NA NA NA 8 1 0.4
Nigeria Ibadan 3.94704 7.37754 TRUE 18pyt42highyldIB 2018-05-07 2019-05-07 FALSE FALSE 1 cassava IITA-TMS-IBA170353 NA 735177 3.8 15600 1312.5 roots 15600 NA NA NA NA 8 1 0.5
Nigeria Ibadan 3.94704 7.37754 TRUE 18pyt42highyldIB 2018-05-07 2019-05-07 FALSE FALSE 1 cassava IITA-TMS-IBA170389 NA 735213 6.9 38100 3437.5 roots 38100 NA NA NA NA 8 1 0.5
Nigeria Ibadan 3.94704 7.37754 TRUE 18pyt42highyldIB 2018-05-07 2019-05-07 FALSE FALSE 1 cassava IITA-TMS-IBA170390 NA 735214 1.8 11300 1500.0 roots 11300 NA NA NA NA 8 1 0.4
Nigeria Ibadan 3.94704 7.37754 TRUE 18pyt42highyldIB 2018-05-07 2019-05-07 FALSE FALSE 1 cassava IITA-TMS-IBA170403 NA 735227 9.1 43100 5687.5 roots 43100 NA NA NA NA 8 1 0.4
Nigeria Ibadan 3.94704 7.37754 TRUE 18pyt42highyldIB 2018-05-07 2019-05-07 FALSE FALSE 1 cassava IITA-TMS-IBA170415 NA 735239 3.4 18800 2562.5 roots 18800 NA NA NA NA 8 1 0.4
Nigeria Ibadan 3.94704 7.37754 TRUE 18pyt42highyldIB 2018-05-07 2019-05-07 FALSE FALSE 1 cassava IITA-TMS-IBA170419 NA 735243 4.8 36900 2625.0 roots 36900 NA NA NA NA 8 1 0.6
Nigeria Ibadan 3.94704 7.37754 TRUE 18pyt42highyldIB 2018-05-07 2019-05-07 FALSE FALSE 1 cassava IITA-TMS-IBA170428 NA 735252 NA NA NA roots NA NA NA NA NA 8 1 NA
Nigeria Ibadan 3.94704 7.37754 TRUE 18pyt42highyldIB 2018-05-07 2019-05-07 FALSE FALSE 1 cassava IITA-TMS-IBA170433 NA 735257 5.6 28100 4000.0 roots 28100 NA NA NA NA 8 1 0.4
Nigeria Ibadan 3.94704 7.37754 TRUE 18pyt42highyldIB 2018-05-07 2019-05-07 FALSE FALSE 1 cassava IITA-TMS-IBA170447 NA 735271 4.9 24400 1937.5 roots 24400 NA NA NA NA 8 1 0.6
Nigeria Ibadan 3.94704 7.37754 TRUE 18pyt42highyldIB 2018-05-07 2019-05-07 FALSE FALSE 1 cassava IITA-TMS-IBA170497 NA 735321 3.8 18800 2187.5 roots 18800 NA NA NA NA 8 1 0.5


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 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
84(100.0%)
 0 (0.0%)
location [character] 1. Ibadan
84(100.0%)
 0 (0.0%)
geo_from_source [logical] 1. TRUE
84(100.0%)
 0 (0.0%)
trial_id [character] 1. 18pyt42highyldIB
84(100.0%)
 0 (0.0%)
planting_date [character] 1. 2018-05-07
84(100.0%)
 0 (0.0%)
harvest_date [character] 1. 2019-05-07
84(100.0%)
 0 (0.0%)
on_farm [logical] 1. FALSE
84(100.0%)
 0 (0.0%)
is_survey [logical] 1. FALSE
84(100.0%)
 0 (0.0%)
rep [integer]
Min : 1
Mean : 1.5
Max : 2
1:42(50.0%)
2:42(50.0%)
 0 (0.0%)
crop [character] 1. cassava
84(100.0%)
 0 (0.0%)
variety [character]
1. IITA-TMS-IBA070337
2. IITA-TMS-IBA070539
3. IITA-TMS-IBA070593
4. IITA-TMS-IBA170112
5. IITA-TMS-IBA170114
6. IITA-TMS-IBA170117
7. IITA-TMS-IBA170119
8. IITA-TMS-IBA170123
9. IITA-TMS-IBA170126
10. IITA-TMS-IBA170164
[ 32 others ]
2(2.4%)
2(2.4%)
2(2.4%)
2(2.4%)
2(2.4%)
2(2.4%)
2(2.4%)
2(2.4%)
2(2.4%)
2(2.4%)
64(76.2%)
 0 (0.0%)
variety_alt [logical]
All NA's
 84 (100.0%)
variety_code [integer]
Mean (sd) : 684890.8 (182703.8)
min ≤ med ≤ max:
29531 ≤ 735247.5 ≤ 735680
IQR (CV) : 405 (0.3)
 42 distinct values 0 (0.0%)
dmy_storage [numeric]
Mean (sd) : 4.4 (2.3)
min ≤ med ≤ max:
0.7 ≤ 4.2 ≤ 10.3
IQR (CV) : 3.7 (0.5)
 50 distinct values 5 (6.0%)
fwy_storage [integer]
Mean (sd) : 21833.8 (10333.3)
min ≤ med ≤ max:
1300 ≤ 20300 ≤ 43100
IQR (CV) : 16200 (0.5)
 49 distinct values 4 (4.8%)
fwy_residue [numeric]
Mean (sd) : 2532.5 (1487.3)
min ≤ med ≤ max:
187.5 ≤ 2187.5 ≤ 7312.5
IQR (CV) : 1937.5 (0.6)
 47 distinct values 4 (4.8%)
yield_part [character] 1. roots
84(100.0%)
 0 (0.0%)
yield [integer]
Mean (sd) : 21833.8 (10333.3)
min ≤ med ≤ max:
1300 ≤ 20300 ≤ 43100
IQR (CV) : 16200 (0.5)
 49 distinct values 4 (4.8%)
N_fertilizer [logical]
All NA's
 84 (100.0%)
P_fertilizer [logical]
All NA's
 84 (100.0%)
K_fertilizer [logical]
All NA's
 84 (100.0%)
irrigated [logical]
All NA's
 84 (100.0%)
plot_length [integer] 1 distinct value
8:84(100.0%)
 0 (0.0%)
plot_width [integer] 1 distinct value
1:84(100.0%)
 0 (0.0%)
harvest_index [numeric]
Mean (sd) : 0.5 (0.1)
min ≤ med ≤ max:
0.3 ≤ 0.5 ≤ 0.7
IQR (CV) : 0.1 (0.2)
 5 distinct values 4 (4.8%)