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 (24 clones) in Ibadan 2016/2017 Breeding Season”. 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 (2017). Assessment of Varieties of Cassava for high yield, disease resistance and high total carotenoid retention in an Preliminary Yield Trial (24 clones) in Ibadan 2016/2017 Breeding Season. International Institute of Tropical Agriculture (IITA). Not versioned. doi:10.25502/BV1B-7Y98

The dataset has 47 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 16pyt24highTCIB 2016-11-05 2017-04-11 FALSE FALSE 1 cassava IITA-TMS-IBA070337 NA 31142 7.89 23750 2125.0 roots 23750 NA NA NA NA 8 1 0.36
Nigeria Ibadan 3.94704 7.37754 TRUE 16pyt24highTCIB 2016-11-05 2017-04-11 FALSE FALSE 1 cassava IITA-TMS-IBA070539 NA 29531 7.37 48750 2062.5 roots 48750 NA NA NA NA 8 1 0.54
Nigeria Ibadan 3.94704 7.37754 TRUE 16pyt24highTCIB 2016-11-05 2017-04-11 FALSE FALSE 1 cassava IITA-TMS-IBA070593 NA 29557 6.21 25000 1875.0 roots 25000 NA NA NA NA 8 1 0.40
Nigeria Ibadan 3.94704 7.37754 TRUE 16pyt24highTCIB 2016-11-05 2017-04-11 FALSE FALSE 1 cassava IITA-TMS-IBA160171 NA 552481 0.24 1250 500.0 roots 1250 NA NA NA NA 8 1 0.11
Nigeria Ibadan 3.94704 7.37754 TRUE 16pyt24highTCIB 2016-11-05 2017-04-11 FALSE FALSE 1 cassava IITA-TMS-IBA160172 NA 552477 NA NA NA roots NA NA NA NA NA 8 1 NA
Nigeria Ibadan 3.94704 7.37754 TRUE 16pyt24highTCIB 2016-11-05 2017-04-11 FALSE FALSE 1 cassava IITA-TMS-IBA160173 NA 552478 0.42 2500 500.0 roots 2500 NA NA NA NA 8 1 0.20
Nigeria Ibadan 3.94704 7.37754 TRUE 16pyt24highTCIB 2016-11-05 2017-04-11 FALSE FALSE 1 cassava IITA-TMS-IBA160174 NA 552487 3.04 16250 1375.0 roots 16250 NA NA NA NA 8 1 0.37
Nigeria Ibadan 3.94704 7.37754 TRUE 16pyt24highTCIB 2016-11-05 2017-04-11 FALSE FALSE 1 cassava IITA-TMS-IBA160175 NA 552489 NA NA NA roots NA NA NA NA NA 8 1 NA
Nigeria Ibadan 3.94704 7.37754 TRUE 16pyt24highTCIB 2016-11-05 2017-04-11 FALSE FALSE 1 cassava IITA-TMS-IBA160176 NA 552493 1.78 12500 1250.0 roots 12500 NA NA NA NA 8 1 0.33
Nigeria Ibadan 3.94704 7.37754 TRUE 16pyt24highTCIB 2016-11-05 2017-04-11 FALSE FALSE 1 cassava IITA-TMS-IBA160177 NA 552483 2.42 11250 687.5 roots 11250 NA NA NA NA 8 1 0.45
Nigeria Ibadan 3.94704 7.37754 TRUE 16pyt24highTCIB 2016-11-05 2017-04-11 FALSE FALSE 1 cassava IITA-TMS-IBA160178 NA 552488 0.76 5000 812.5 roots 5000 NA NA NA NA 8 1 0.24
Nigeria Ibadan 3.94704 7.37754 TRUE 16pyt24highTCIB 2016-11-05 2017-04-11 FALSE FALSE 1 cassava IITA-TMS-IBA160179 NA 552474 0.21 1250 312.5 roots 1250 NA NA NA NA 8 1 0.17
Nigeria Ibadan 3.94704 7.37754 TRUE 16pyt24highTCIB 2016-11-05 2017-04-11 FALSE FALSE 1 cassava IITA-TMS-IBA160180 NA 552485 NA NA NA roots NA NA NA NA NA 8 1 NA
Nigeria Ibadan 3.94704 7.37754 TRUE 16pyt24highTCIB 2016-11-05 2017-04-11 FALSE FALSE 1 cassava IITA-TMS-IBA160181 NA 552494 2.91 17500 1687.5 roots 17500 NA NA NA NA 8 1 0.34
Nigeria Ibadan 3.94704 7.37754 TRUE 16pyt24highTCIB 2016-11-05 2017-04-11 FALSE FALSE 1 cassava IITA-TMS-IBA160182 NA 552482 NA NA NA roots NA NA NA NA NA 8 1 NA
Nigeria Ibadan 3.94704 7.37754 TRUE 16pyt24highTCIB 2016-11-05 2017-04-11 FALSE FALSE 1 cassava IITA-TMS-IBA160183 NA 552480 3.00 23750 2000.0 roots 23750 NA NA NA NA 8 1 0.37
Nigeria Ibadan 3.94704 7.37754 TRUE 16pyt24highTCIB 2016-11-05 2017-04-11 FALSE FALSE 1 cassava IITA-TMS-IBA160184 NA 552492 NA NA NA roots NA NA NA NA NA 8 1 NA
Nigeria Ibadan 3.94704 7.37754 TRUE 16pyt24highTCIB 2016-11-05 2017-04-11 FALSE FALSE 1 cassava IITA-TMS-IBA160185 NA 552490 1.08 6250 1875.0 roots 6250 NA NA NA NA 8 1 0.14
Nigeria Ibadan 3.94704 7.37754 TRUE 16pyt24highTCIB 2016-11-05 2017-04-11 FALSE FALSE 1 cassava IITA-TMS-IBA160186 NA 552475 NA NA NA roots NA NA NA NA NA 8 1 NA
Nigeria Ibadan 3.94704 7.37754 TRUE 16pyt24highTCIB 2016-11-05 2017-04-11 FALSE FALSE 1 cassava IITA-TMS-IBA160187 NA 552484 0.84 3750 500.0 roots 3750 NA NA NA NA 8 1 0.27
Nigeria Ibadan 3.94704 7.37754 TRUE 16pyt24highTCIB 2016-11-05 2017-04-11 FALSE FALSE 1 cassava IITA-TMS-IBA160188 NA 552476 NA 500 125.0 roots 500 NA NA NA NA 8 1 0.17
Nigeria Ibadan 3.94704 7.37754 TRUE 16pyt24highTCIB 2016-11-05 2017-04-11 FALSE FALSE 1 cassava IITA-TMS-IBA160189 NA 552479 NA NA NA roots NA NA NA NA NA 8 1 NA
Nigeria Ibadan 3.94704 7.37754 TRUE 16pyt24highTCIB 2016-11-05 2017-04-11 FALSE FALSE 1 cassava IITA-TMS-IBA160190 NA 552486 NA NA NA roots NA NA NA NA NA 8 1 NA
Nigeria Ibadan 3.94704 7.37754 TRUE 16pyt24highTCIB 2016-11-05 2017-04-11 FALSE FALSE 1 cassava IITA-TMS-IBA160191 NA 552491 0.75 3750 500.0 roots 3750 NA NA NA NA 8 1 0.27
Nigeria Ibadan 3.94704 7.37754 TRUE 16pyt24highTCIB 2016-11-05 2017-04-11 FALSE FALSE 2 cassava IITA-TMS-IBA070337 NA 31142 11.31 33750 3500.0 roots 33750 NA NA NA NA 8 1 0.33


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
47(100.0%)
 0 (0.0%)
location [character] 1. Ibadan
47(100.0%)
 0 (0.0%)
geo_from_source [logical] 1. TRUE
47(100.0%)
 0 (0.0%)
trial_id [character] 1. 16pyt24highTCIB
47(100.0%)
 0 (0.0%)
planting_date [character] 1. 2016-11-05
47(100.0%)
 0 (0.0%)
harvest_date [character] 1. 2017-04-11
47(100.0%)
 0 (0.0%)
on_farm [logical] 1. FALSE
47(100.0%)
 0 (0.0%)
is_survey [logical] 1. FALSE
47(100.0%)
 0 (0.0%)
rep [integer]
Min : 1
Mean : 1.5
Max : 2
1:24(51.1%)
2:23(48.9%)
 0 (0.0%)
crop [character] 1. cassava
47(100.0%)
 0 (0.0%)
variety [character]
1. IITA-TMS-IBA070337
2. IITA-TMS-IBA070539
3. IITA-TMS-IBA070593
4. IITA-TMS-IBA160171
5. IITA-TMS-IBA160172
6. IITA-TMS-IBA160173
7. IITA-TMS-IBA160174
8. IITA-TMS-IBA160175
9. IITA-TMS-IBA160176
10. IITA-TMS-IBA160178
[ 14 others ]
2(4.3%)
2(4.3%)
2(4.3%)
2(4.3%)
2(4.3%)
2(4.3%)
2(4.3%)
2(4.3%)
2(4.3%)
2(4.3%)
27(57.4%)
 0 (0.0%)
variety_alt [logical]
All NA's
 47 (100.0%)
variety_code [integer]
Mean (sd) : 485793.7 (176217.7)
min ≤ med ≤ max:
29531 ≤ 552482 ≤ 552494
IQR (CV) : 12 (0.4)
 24 distinct values 0 (0.0%)
dmy_storage [numeric]
Mean (sd) : 3 (3.1)
min ≤ med ≤ max:
0.1 ≤ 1.7 ≤ 11.3
IQR (CV) : 2.4 (1)
 30 distinct values 17 (36.2%)
fwy_storage [integer]
Mean (sd) : 13685.5 (12275.6)
min ≤ med ≤ max:
500 ≤ 10000 ≤ 48750
IQR (CV) : 16250 (0.9)
 17 distinct values 16 (34.0%)
fwy_residue [numeric]
Mean (sd) : 1276.2 (845)
min ≤ med ≤ max:
125 ≤ 1187.5 ≤ 3500
IQR (CV) : 1312.5 (0.7)
 21 distinct values 16 (34.0%)
yield_part [character] 1. roots
47(100.0%)
 0 (0.0%)
yield [integer]
Mean (sd) : 13685.5 (12275.6)
min ≤ med ≤ max:
500 ≤ 10000 ≤ 48750
IQR (CV) : 16250 (0.9)
 17 distinct values 16 (34.0%)
N_fertilizer [logical]
All NA's
 47 (100.0%)
P_fertilizer [logical]
All NA's
 47 (100.0%)
K_fertilizer [logical]
All NA's
 47 (100.0%)
irrigated [logical]
All NA's
 47 (100.0%)
plot_length [integer] 1 distinct value
8:47(100.0%)
 0 (0.0%)
plot_width [integer] 1 distinct value
1:47(100.0%)
 0 (0.0%)
harvest_index [numeric]
Mean (sd) : 0.3 (0.1)
min ≤ med ≤ max:
0.1 ≤ 0.3 ≤ 0.5
IQR (CV) : 0.2 (0.3)
 21 distinct values 16 (34.0%)