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 (56 clones) in Ibadan 2017/2018 Breeding Season from 2016 clonal evaluation seta ibadan 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 yield, disease resistance and high total carotenoid retention in an Preliminary Yield Trial (56 clones) in Ibadan 2017/2018 Breeding Season from 2016 clonal evaluation seta ibadan IB. International Institute of Tropical Agriculture (IITA). Not versioned. doi:10.25502/CXHV-ZK46

The dataset has 112 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 17pyt56HTCIB 2017-04-28 2018-04-28 FALSE FALSE 1 cassava IITA-TMS-IBA011797 NA 4957 6500 545.45455 roots 6500 NA NA NA NA 5.5 4 0.30
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt56HTCIB 2017-04-28 2018-04-28 FALSE FALSE 1 cassava IITA-TMS-IBA070337 NA 31142 31000 1227.27273 roots 31000 NA NA NA NA 5.5 4 0.48
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt56HTCIB 2017-04-28 2018-04-28 FALSE FALSE 1 cassava IITA-TMS-IBA070539 NA 29531 15500 681.81818 roots 15500 NA NA NA NA 5.5 4 0.45
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt56HTCIB 2017-04-28 2018-04-28 FALSE FALSE 1 cassava IITA-TMS-IBA070593 NA 29557 17750 681.81818 roots 17750 NA NA NA NA 5.5 4 0.49
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt56HTCIB 2017-04-28 2018-04-28 FALSE FALSE 1 cassava IITA-TMS-IBA120008 NA 399582 12000 827.27273 roots 12000 NA NA NA NA 5.5 4 0.35
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt56HTCIB 2017-04-28 2018-04-28 FALSE FALSE 1 cassava IITA-TMS-IBA141092 NA 398035 22500 918.18182 roots 22500 NA NA NA NA 5.5 4 0.47
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt56HTCIB 2017-04-28 2018-04-28 FALSE FALSE 1 cassava IITA-TMS-IBA160211 NA 605696 1250 318.18182 roots 1250 NA NA NA NA 5.5 4 0.13
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt56HTCIB 2017-04-28 2018-04-28 FALSE FALSE 1 cassava IITA-TMS-IBA160213 NA 605735 NA NA roots NA NA NA NA NA 5.5 4 NA
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt56HTCIB 2017-04-28 2018-04-28 FALSE FALSE 1 cassava IITA-TMS-IBA160214 NA 605642 22000 954.54545 roots 22000 NA NA NA NA 5.5 4 0.46
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt56HTCIB 2017-04-28 2018-04-28 FALSE FALSE 1 cassava IITA-TMS-IBA160222 NA 605533 12500 772.72727 roots 12500 NA NA NA NA 5.5 4 0.37
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt56HTCIB 2017-04-28 2018-04-28 FALSE FALSE 1 cassava IITA-TMS-IBA160229 NA 605587 34500 790.90909 roots 34500 NA NA NA NA 5.5 4 0.61
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt56HTCIB 2017-04-28 2018-04-28 FALSE FALSE 1 cassava IITA-TMS-IBA160241 NA 605713 2000 36.36364 roots 2000 NA NA NA NA 5.5 4 0.67
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt56HTCIB 2017-04-28 2018-04-28 FALSE FALSE 1 cassava IITA-TMS-IBA160242 NA 605779 4000 354.54545 roots 4000 NA NA NA NA 5.5 4 0.29
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt56HTCIB 2017-04-28 2018-04-28 FALSE FALSE 1 cassava IITA-TMS-IBA160245 NA 605582 17000 418.18182 roots 17000 NA NA NA NA 5.5 4 0.60
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt56HTCIB 2017-04-28 2018-04-28 FALSE FALSE 1 cassava IITA-TMS-IBA160280 NA 605698 11250 636.36364 roots 11250 NA NA NA NA 5.5 4 0.39
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt56HTCIB 2017-04-28 2018-04-28 FALSE FALSE 1 cassava IITA-TMS-IBA160282 NA 605745 4500 590.90909 roots 4500 NA NA NA NA 5.5 4 0.22
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt56HTCIB 2017-04-28 2018-04-28 FALSE FALSE 1 cassava IITA-TMS-IBA160284 NA 605710 13000 745.45455 roots 13000 NA NA NA NA 5.5 4 0.39
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt56HTCIB 2017-04-28 2018-04-28 FALSE FALSE 1 cassava IITA-TMS-IBA160292 NA 605500 19000 1200.00000 roots 19000 NA NA NA NA 5.5 4 0.37
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt56HTCIB 2017-04-28 2018-04-28 FALSE FALSE 1 cassava IITA-TMS-IBA160311 NA 605627 11250 818.18182 roots 11250 NA NA NA NA 5.5 4 0.33
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt56HTCIB 2017-04-28 2018-04-28 FALSE FALSE 1 cassava IITA-TMS-IBA160333 NA 605719 17250 836.36364 roots 17250 NA NA NA NA 5.5 4 0.43
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt56HTCIB 2017-04-28 2018-04-28 FALSE FALSE 1 cassava IITA-TMS-IBA160340 NA 605553 11750 381.81818 roots 11750 NA NA NA NA 5.5 4 0.53
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt56HTCIB 2017-04-28 2018-04-28 FALSE FALSE 1 cassava IITA-TMS-IBA160342 NA 605712 16250 700.00000 roots 16250 NA NA NA NA 5.5 4 0.46
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt56HTCIB 2017-04-28 2018-04-28 FALSE FALSE 1 cassava IITA-TMS-IBA160356 NA 605767 10750 681.81818 roots 10750 NA NA NA NA 5.5 4 0.36
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt56HTCIB 2017-04-28 2018-04-28 FALSE FALSE 1 cassava IITA-TMS-IBA160380 NA 605716 30250 1090.90909 roots 30250 NA NA NA NA 5.5 4 0.50
Nigeria Ibadan 3.94704 7.37754 TRUE 17pyt56HTCIB 2017-04-28 2018-04-28 FALSE FALSE 1 cassava IITA-TMS-IBA160385 NA 605728 14750 909.09091 roots 14750 NA NA NA NA 5.5 4 0.37


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
112(100.0%)
 0 (0.0%)
location [character] 1. Ibadan
112(100.0%)
 0 (0.0%)
geo_from_source [logical] 1. TRUE
112(100.0%)
 0 (0.0%)
trial_id [character] 1. 17pyt56HTCIB
112(100.0%)
 0 (0.0%)
planting_date [character] 1. 2017-04-28
112(100.0%)
 0 (0.0%)
harvest_date [character] 1. 2018-04-28
112(100.0%)
 0 (0.0%)
on_farm [logical] 1. FALSE
112(100.0%)
 0 (0.0%)
is_survey [logical] 1. FALSE
112(100.0%)
 0 (0.0%)
rep [integer]
Min : 1
Mean : 1.5
Max : 2
1:56(50.0%)
2:56(50.0%)
 0 (0.0%)
crop [character] 1. cassava
112(100.0%)
 0 (0.0%)
variety [character]
1. IITA-TMS-IBA011797
2. IITA-TMS-IBA070337
3. IITA-TMS-IBA070539
4. IITA-TMS-IBA070593
5. IITA-TMS-IBA120008
6. IITA-TMS-IBA141092
7. IITA-TMS-IBA160211
8. IITA-TMS-IBA160213
9. IITA-TMS-IBA160214
10. IITA-TMS-IBA160222
[ 46 others ]
2(1.8%)
2(1.8%)
2(1.8%)
2(1.8%)
2(1.8%)
2(1.8%)
2(1.8%)
2(1.8%)
2(1.8%)
2(1.8%)
92(82.1%)
 0 (0.0%)
variety_alt [logical]
All NA's
 112 (100.0%)
variety_code [integer]
Mean (sd) : 537103.1 (179663.1)
min ≤ med ≤ max:
647 ≤ 605728.5 ≤ 606061
IQR (CV) : 246.5 (0.3)
 56 distinct values 0 (0.0%)
fwy_storage [integer]
Mean (sd) : 12639.1 (7752.5)
min ≤ med ≤ max:
250 ≤ 11500 ≤ 37500
IQR (CV) : 10500 (0.6)
 69 distinct values 5 (4.5%)
fwy_residue [numeric]
Mean (sd) : 705.8 (266.5)
min ≤ med ≤ max:
36.4 ≤ 745.5 ≤ 1272.7
IQR (CV) : 404.5 (0.4)
 67 distinct values 5 (4.5%)
yield_part [character] 1. roots
112(100.0%)
 0 (0.0%)
yield [integer]
Mean (sd) : 12639.1 (7752.5)
min ≤ med ≤ max:
250 ≤ 11500 ≤ 37500
IQR (CV) : 10500 (0.6)
 69 distinct values 5 (4.5%)
N_fertilizer [logical]
All NA's
 112 (100.0%)
P_fertilizer [logical]
All NA's
 112 (100.0%)
K_fertilizer [logical]
All NA's
 112 (100.0%)
irrigated [logical]
All NA's
 112 (100.0%)
plot_length [numeric] 1 distinct value
5.50:112(100.0%)
 0 (0.0%)
plot_width [integer] 1 distinct value
4:112(100.0%)
 0 (0.0%)
harvest_index [numeric]
Mean (sd) : 0.4 (0.1)
min ≤ med ≤ max:
0 ≤ 0.4 ≤ 0.7
IQR (CV) : 0.1 (0.4)
 44 distinct values 5 (4.5%)