This report describes standardized data for “Assessment of Varieties of Cassava for high total carotene, high yield, and disease resistance using Preliminary Yield Trial (10 clones) in Ibadan 2017/2018 Breeding Season from 2016seedling nursery27 replicated_b13 IB.”. 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 total carotene, high yield, and disease resistance using Preliminary Yield Trial (10 clones) in Ibadan 2017/2018 Breeding Season from 2016seedling nursery27 replicated_b13 IB. International Institute of Tropical Agriculture (IITA). Not versioned. doi:10.25502/0NAV-Y572

The dataset has 20 records and 29 variables for cassava in Nigeria. The dataset has 1 treatment(s): variety.


These are the first 20 records:

records
trial_id planting_date harvest_date on_farm is_survey rep crop variety variety_alt variety_code fwy_storage fwy_residue yield_part yield yield_moisture N_fertilizer P_fertilizer K_fertilizer irrigated plot_length plot_width harvest_index country location longitude latitude geo_from_source
17pyt10HTCIB 2017-06-14 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA070539 NA 29531 3000 1950 roots 3000 NA NA NA NA NA 4 1 0.13 Nigeria Ibadan 3.94704 7.37754 TRUE
17pyt10HTCIB 2017-06-14 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA070593 NA 29557 29000 2450 roots 29000 NA NA NA NA NA 4 1 0.54 Nigeria Ibadan 3.94704 7.37754 TRUE
17pyt10HTCIB 2017-06-14 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA141092 NA 398035 39000 3550 roots 39000 NA NA NA NA NA 4 1 0.52 Nigeria Ibadan 3.94704 7.37754 TRUE
17pyt10HTCIB 2017-06-14 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA170061 NA 639723 39000 3800 roots 39000 NA NA NA NA NA 4 1 0.51 Nigeria Ibadan 3.94704 7.37754 TRUE
17pyt10HTCIB 2017-06-14 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA170062 NA 639724 9000 950 roots 9000 NA NA NA NA NA 4 1 0.49 Nigeria Ibadan 3.94704 7.37754 TRUE
17pyt10HTCIB 2017-06-14 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA170063 NA 639725 31000 4850 roots 31000 NA NA NA NA NA 4 1 0.39 Nigeria Ibadan 3.94704 7.37754 TRUE
17pyt10HTCIB 2017-06-14 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA170064 NA 639726 3000 1200 roots 3000 NA NA NA NA NA 4 1 0.20 Nigeria Ibadan 3.94704 7.37754 TRUE
17pyt10HTCIB 2017-06-14 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA170065 NA 639727 20500 3800 roots 20500 NA NA NA NA NA 4 1 0.35 Nigeria Ibadan 3.94704 7.37754 TRUE
17pyt10HTCIB 2017-06-14 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA170066 NA 639728 500 400 roots 500 NA NA NA NA NA 4 1 0.11 Nigeria Ibadan 3.94704 7.37754 TRUE
17pyt10HTCIB 2017-06-14 2018-05-14 FALSE FALSE 1 cassava IITA-TMS-IBA170067 NA 639729 31500 1850 roots 31500 NA NA NA NA NA 4 1 0.63 Nigeria Ibadan 3.94704 7.37754 TRUE
17pyt10HTCIB 2017-06-14 2018-05-14 FALSE FALSE 2 cassava IITA-TMS-IBA070539 NA 29531 6500 1800 roots 6500 NA NA NA NA NA 4 1 0.27 Nigeria Ibadan 3.94704 7.37754 TRUE
17pyt10HTCIB 2017-06-14 2018-05-14 FALSE FALSE 2 cassava IITA-TMS-IBA070593 NA 29557 22500 3100 roots 22500 NA NA NA NA NA 4 1 0.42 Nigeria Ibadan 3.94704 7.37754 TRUE
17pyt10HTCIB 2017-06-14 2018-05-14 FALSE FALSE 2 cassava IITA-TMS-IBA141092 NA 398035 29000 2950 roots 29000 NA NA NA NA NA 4 1 0.50 Nigeria Ibadan 3.94704 7.37754 TRUE
17pyt10HTCIB 2017-06-14 2018-05-14 FALSE FALSE 2 cassava IITA-TMS-IBA170061 NA 639723 24000 4050 roots 24000 NA NA NA NA NA 4 1 0.37 Nigeria Ibadan 3.94704 7.37754 TRUE
17pyt10HTCIB 2017-06-14 2018-05-14 FALSE FALSE 2 cassava IITA-TMS-IBA170062 NA 639724 21000 2750 roots 21000 NA NA NA NA NA 4 1 0.43 Nigeria Ibadan 3.94704 7.37754 TRUE
17pyt10HTCIB 2017-06-14 2018-05-14 FALSE FALSE 2 cassava IITA-TMS-IBA170063 NA 639725 NA NA roots NA NA NA NA NA NA 4 1 NA Nigeria Ibadan 3.94704 7.37754 TRUE
17pyt10HTCIB 2017-06-14 2018-05-14 FALSE FALSE 2 cassava IITA-TMS-IBA170064 NA 639726 14000 900 roots 14000 NA NA NA NA NA 4 1 0.61 Nigeria Ibadan 3.94704 7.37754 TRUE
17pyt10HTCIB 2017-06-14 2018-05-14 FALSE FALSE 2 cassava IITA-TMS-IBA170065 NA 639727 5500 1650 roots 5500 NA NA NA NA NA 4 1 0.25 Nigeria Ibadan 3.94704 7.37754 TRUE
17pyt10HTCIB 2017-06-14 2018-05-14 FALSE FALSE 2 cassava IITA-TMS-IBA170066 NA 639728 NA 500 roots NA NA NA NA NA NA 4 1 NA Nigeria Ibadan 3.94704 7.37754 TRUE
17pyt10HTCIB 2017-06-14 2018-05-14 FALSE FALSE 2 cassava IITA-TMS-IBA170067 NA 639729 34500 1800 roots 34500 NA NA NA NA NA 4 1 0.66 Nigeria Ibadan 3.94704 7.37754 TRUE


The observations were made at 1 locations. We have coordinates for 1 of these locations.


The standardization script emits the following non-compliance warnings.

type message
NA values yield

The overall quality of the dataset, given the completeness of required variables was 6.2 on a scale of 10. See the table below

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


The data are further summarized in the table below.

Variable Stats / Values Freqs (% of Valid) Graph Missing
trial_id [character] 1. 17pyt10HTCIB
20(100.0%)
 0 (0.0%)
planting_date [character] 1. 2017-06-14
20(100.0%)
 0 (0.0%)
harvest_date [character] 1. 2018-05-14
20(100.0%)
 0 (0.0%)
on_farm [logical] 1. FALSE
20(100.0%)
 0 (0.0%)
is_survey [logical] 1. FALSE
20(100.0%)
 0 (0.0%)
rep [integer]
Min : 1
Mean : 1.5
Max : 2
1:10(50.0%)
2:10(50.0%)
 0 (0.0%)
crop [character] 1. cassava
20(100.0%)
 0 (0.0%)
variety [character]
1. IITA-TMS-IBA070539
2. IITA-TMS-IBA070593
3. IITA-TMS-IBA141092
4. IITA-TMS-IBA170061
5. IITA-TMS-IBA170062
6. IITA-TMS-IBA170063
7. IITA-TMS-IBA170064
8. IITA-TMS-IBA170065
9. IITA-TMS-IBA170066
10. IITA-TMS-IBA170067
2(10.0%)
2(10.0%)
2(10.0%)
2(10.0%)
2(10.0%)
2(10.0%)
2(10.0%)
2(10.0%)
2(10.0%)
2(10.0%)
 0 (0.0%)
variety_alt [logical]
All NA's
 20 (100.0%)
variety_code [integer]
Mean (sd) : 493520.5 (249061)
min ≤ med ≤ max:
29531 ≤ 639724.5 ≤ 639729
IQR (CV) : 241692 (0.5)
29531:2(10.0%)
29557:2(10.0%)
398035:2(10.0%)
639723:2(10.0%)
639724:2(10.0%)
639725:2(10.0%)
639726:2(10.0%)
639727:2(10.0%)
639728:2(10.0%)
639729:2(10.0%)
 0 (0.0%)
fwy_storage [integer]
Mean (sd) : 20138.9 (13012.2)
min ≤ med ≤ max:
500 ≤ 21750 ≤ 39000
IQR (CV) : 23375 (0.6)
 15 distinct values 2 (10.0%)
fwy_residue [integer]
Mean (sd) : 2331.6 (1290.7)
min ≤ med ≤ max:
400 ≤ 1950 ≤ 4850
IQR (CV) : 1900 (0.6)
 17 distinct values 1 (5.0%)
yield_part [character] 1. roots
20(100.0%)
 0 (0.0%)
yield [integer]
Mean (sd) : 20138.9 (13012.2)
min ≤ med ≤ max:
500 ≤ 21750 ≤ 39000
IQR (CV) : 23375 (0.6)
 15 distinct values 2 (10.0%)
yield_moisture [logical]
All NA's
 20 (100.0%)
N_fertilizer [logical]
All NA's
 20 (100.0%)
P_fertilizer [logical]
All NA's
 20 (100.0%)
K_fertilizer [logical]
All NA's
 20 (100.0%)
irrigated [logical]
All NA's
 20 (100.0%)
plot_length [integer] 1 distinct value
4:20(100.0%)
 0 (0.0%)
plot_width [integer] 1 distinct value
1:20(100.0%)
 0 (0.0%)
harvest_index [numeric]
Mean (sd) : 0.4 (0.2)
min ≤ med ≤ max:
0.1 ≤ 0.4 ≤ 0.7
IQR (CV) : 0.2 (0.4)
 18 distinct values 2 (10.0%)
country [character] 1. Nigeria
20(100.0%)
 0 (0.0%)
location [character] 1. Ibadan
20(100.0%)
 0 (0.0%)
geo_from_source [logical] 1. TRUE
20(100.0%)
 0 (0.0%)