This report describes standardized data for “Biofortification of Cassava using advanced Yield Trial (23 clones) in Ubiaja 2004/2005 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 (2005). Biofortification of Cassava using advanced Yield Trial (23 clones) in Ubiaja 2004/2005 Breeding Season. International Institute of Tropical Agriculture (IITA). Not versioned. doi:10.25502/GPFY-7R48

The dataset has 92 records and 30 variables for cassava in Nigeria. The dataset has 1 treatment(s): variety.


These are the first 25 records:

records
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 yield_moisture N_fertilizer P_fertilizer K_fertilizer irrigated plot_length plot_width harvest_index country location longitude latitude geo_from_source
04uyt23yrtUB 2004-08-13 2005-07-08 FALSE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 2.3 6500 NA roots 6500 64.7 NA NA NA NA NA NA 0.6 Nigeria Ubiaja 6.39177 6.64933 TRUE
04uyt23yrtUB 2004-08-13 2005-07-08 FALSE FALSE 1 cassava IITA-TMS-IBA000028 NA 1930 5.6 18300 NA roots 18300 69.5 NA NA NA NA NA NA 0.7 Nigeria Ubiaja 6.39177 6.64933 TRUE
04uyt23yrtUB 2004-08-13 2005-07-08 FALSE FALSE 1 cassava IITA-TMS-IBA011172 NA 3639 5.1 14000 NA roots 14000 63.6 NA NA NA NA NA NA 0.6 Nigeria Ubiaja 6.39177 6.64933 TRUE
04uyt23yrtUB 2004-08-13 2005-07-08 FALSE FALSE 1 cassava IITA-TMS-IBA011181 NA 3641 4.5 13400 NA roots 13400 66.5 NA NA NA NA NA NA 0.6 Nigeria Ubiaja 6.39177 6.64933 TRUE
04uyt23yrtUB 2004-08-13 2005-07-08 FALSE FALSE 1 cassava IITA-TMS-IBA011206 NA 3643 5.2 15800 NA roots 15800 67.1 NA NA NA NA NA NA 0.7 Nigeria Ubiaja 6.39177 6.64933 TRUE
04uyt23yrtUB 2004-08-13 2005-07-08 FALSE FALSE 1 cassava IITA-TMS-IBA011231 NA 3646 5.1 12500 NA roots 12500 59.3 NA NA NA NA NA NA 0.6 Nigeria Ubiaja 6.39177 6.64933 TRUE
04uyt23yrtUB 2004-08-13 2005-07-08 FALSE FALSE 1 cassava IITA-TMS-IBA011296 NA 3652 3.4 9800 NA roots 9800 65.6 NA NA NA NA NA NA 0.6 Nigeria Ubiaja 6.39177 6.64933 TRUE
04uyt23yrtUB 2004-08-13 2005-07-08 FALSE FALSE 1 cassava IITA-TMS-IBA011380 NA 3658 4.4 13600 NA roots 13600 67.4 NA NA NA NA NA NA 0.7 Nigeria Ubiaja 6.39177 6.64933 TRUE
04uyt23yrtUB 2004-08-13 2005-07-08 FALSE FALSE 1 cassava IITA-TMS-IBA011404 NA 3660 4.2 13800 NA roots 13800 69.2 NA NA NA NA NA NA 0.6 Nigeria Ubiaja 6.39177 6.64933 TRUE
04uyt23yrtUB 2004-08-13 2005-07-08 FALSE FALSE 1 cassava IITA-TMS-IBA011417 NA 3665 2.7 10600 NA roots 10600 74.3 NA NA NA NA NA NA 0.7 Nigeria Ubiaja 6.39177 6.64933 TRUE
04uyt23yrtUB 2004-08-13 2005-07-08 FALSE FALSE 1 cassava IITA-TMS-IBA011423 NA 3667 2.9 10000 NA roots 10000 70.6 NA NA NA NA NA NA 0.6 Nigeria Ubiaja 6.39177 6.64933 TRUE
04uyt23yrtUB 2004-08-13 2005-07-08 FALSE FALSE 1 cassava IITA-TMS-IBA011551 NA 3670 5.8 13900 NA roots 13900 58.1 NA NA NA NA NA NA 0.6 Nigeria Ubiaja 6.39177 6.64933 TRUE
04uyt23yrtUB 2004-08-13 2005-07-08 FALSE FALSE 1 cassava IITA-TMS-IBA011560 NA 3672 4.5 14900 NA roots 14900 69.6 NA NA NA NA NA NA 0.6 Nigeria Ubiaja 6.39177 6.64933 TRUE
04uyt23yrtUB 2004-08-13 2005-07-08 FALSE FALSE 1 cassava IITA-TMS-IBA011635 NA 3675 4.1 9800 NA roots 9800 58.3 NA NA NA NA NA NA 0.5 Nigeria Ubiaja 6.39177 6.64933 TRUE
04uyt23yrtUB 2004-08-13 2005-07-08 FALSE FALSE 1 cassava IITA-TMS-IBA011659 NA 3681 2.0 6600 NA roots 6600 70.0 NA NA NA NA NA NA 0.5 Nigeria Ubiaja 6.39177 6.64933 TRUE
04uyt23yrtUB 2004-08-13 2005-07-08 FALSE FALSE 1 cassava IITA-TMS-IBA9102324 NA 374 5.8 15300 NA roots 15300 62.2 NA NA NA NA NA NA 0.6 Nigeria Ubiaja 6.39177 6.64933 TRUE
04uyt23yrtUB 2004-08-13 2005-07-08 FALSE FALSE 1 cassava IITA-TMS-IBA940561 NA 1041 1.3 4500 NA roots 4500 71.8 NA NA NA NA NA NA 0.5 Nigeria Ubiaja 6.39177 6.64933 TRUE
04uyt23yrtUB 2004-08-13 2005-07-08 FALSE FALSE 1 cassava IITA-TMS-IBA961089A NA 647 3.8 10100 NA roots 10100 62.0 NA NA NA NA NA NA 0.8 Nigeria Ubiaja 6.39177 6.64933 TRUE
04uyt23yrtUB 2004-08-13 2005-07-08 FALSE FALSE 1 cassava IITA-TMS-IBA970211 NA 675 2.5 6300 NA roots 6300 60.2 NA NA NA NA NA NA 0.6 Nigeria Ubiaja 6.39177 6.64933 TRUE
04uyt23yrtUB 2004-08-13 2005-07-08 FALSE FALSE 1 cassava IITA-TMS-IBA992987 NA 38821 0.5 1300 NA roots 1300 61.6 NA NA NA NA NA NA 0.9 Nigeria Ubiaja 6.39177 6.64933 TRUE
04uyt23yrtUB 2004-08-13 2005-07-08 FALSE FALSE 1 cassava IITA-TMS-IBA997578 NA 13635 3.0 9100 NA roots 9100 67.5 NA NA NA NA NA NA 0.6 Nigeria Ubiaja 6.39177 6.64933 TRUE
04uyt23yrtUB 2004-08-13 2005-07-08 FALSE FALSE 1 cassava IITA-TMS-ZAR970474 NA 39458 5.0 13300 NA roots 13300 62.4 NA NA NA NA NA NA 0.7 Nigeria Ubiaja 6.39177 6.64933 TRUE
04uyt23yrtUB 2004-08-13 2005-07-08 FALSE FALSE 1 cassava TMEB1 NA 39629 2.4 6300 NA roots 6300 61.1 NA NA NA NA NA NA 0.5 Nigeria Ubiaja 6.39177 6.64933 TRUE
04uyt23yrtUB 2004-08-13 2005-07-08 FALSE FALSE 2 cassava IITA-TMS-IBA000028 NA 1930 3.2 9100 NA roots 9100 65.4 NA NA NA NA NA NA 0.7 Nigeria Ubiaja 6.39177 6.64933 TRUE
04uyt23yrtUB 2004-08-13 2005-07-08 FALSE FALSE 2 cassava IITA-TMS-IBA011172 NA 3639 5.2 14100 NA roots 14100 63.3 NA NA NA NA NA NA 0.7 Nigeria Ubiaja 6.39177 6.64933 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
invalid terms disease: bacterial blight, mosaic

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. 04uyt23yrtUB
92(100.0%)
 0 (0.0%)
planting_date [character] 1. 2004-08-13
92(100.0%)
 0 (0.0%)
harvest_date [character] 1. 2005-07-08
92(100.0%)
 0 (0.0%)
on_farm [logical] 1. FALSE
92(100.0%)
 0 (0.0%)
is_survey [logical] 1. FALSE
92(100.0%)
 0 (0.0%)
rep [integer]
Mean (sd) : 2.5 (1.1)
min ≤ med ≤ max:
1 ≤ 2.5 ≤ 4
IQR (CV) : 1.5 (0.4)
1:23(25.0%)
2:23(25.0%)
3:23(25.0%)
4:23(25.0%)
 0 (0.0%)
crop [character] 1. cassava
92(100.0%)
 0 (0.0%)
variety [character]
1. IITA-TMS-IBA000028
2. IITA-TMS-IBA011172
3. IITA-TMS-IBA011181
4. IITA-TMS-IBA011206
5. IITA-TMS-IBA011231
6. IITA-TMS-IBA011296
7. IITA-TMS-IBA011380
8. IITA-TMS-IBA011404
9. IITA-TMS-IBA011417
10. IITA-TMS-IBA011423
[ 13 others ]
4(4.3%)
4(4.3%)
4(4.3%)
4(4.3%)
4(4.3%)
4(4.3%)
4(4.3%)
4(4.3%)
4(4.3%)
4(4.3%)
52(56.5%)
 0 (0.0%)
variety_alt [logical]
All NA's
 92 (100.0%)
variety_code [integer]
Mean (sd) : 7990.6 (12459.5)
min ≤ med ≤ max:
5 ≤ 3658 ≤ 39629
IQR (CV) : 1745 (1.6)
 23 distinct values 0 (0.0%)
dmy_storage [numeric]
Mean (sd) : 3.8 (1.9)
min ≤ med ≤ max:
0.4 ≤ 3.9 ≤ 8.2
IQR (CV) : 2.7 (0.5)
 34 distinct values 46 (50.0%)
fwy_storage [integer]
Mean (sd) : 9574.4 (4601.9)
min ≤ med ≤ max:
1300 ≤ 8900 ≤ 25100
IQR (CV) : 6750 (0.5)
 62 distinct values 2 (2.2%)
fwy_residue [logical]
All NA's
 92 (100.0%)
yield_part [character] 1. roots
92(100.0%)
 0 (0.0%)
yield [integer]
Mean (sd) : 9574.4 (4601.9)
min ≤ med ≤ max:
1300 ≤ 8900 ≤ 25100
IQR (CV) : 6750 (0.5)
 62 distinct values 2 (2.2%)
yield_moisture [numeric]
Mean (sd) : 66.2 (4.4)
min ≤ med ≤ max:
58.1 ≤ 66.6 ≤ 74.3
IQR (CV) : 7.1 (0.1)
 40 distinct values 46 (50.0%)
N_fertilizer [logical]
All NA's
 92 (100.0%)
P_fertilizer [logical]
All NA's
 92 (100.0%)
K_fertilizer [logical]
All NA's
 92 (100.0%)
irrigated [logical]
All NA's
 92 (100.0%)
plot_length [logical]
All NA's
 92 (100.0%)
plot_width [logical]
All NA's
 92 (100.0%)
harvest_index [numeric]
Mean (sd) : 0.6 (0.1)
min ≤ med ≤ max:
0.4 ≤ 0.6 ≤ 0.9
IQR (CV) : 0.1 (0.1)
 6 distinct values 2 (2.2%)
country [character] 1. Nigeria
92(100.0%)
 0 (0.0%)
location [character] 1. Ubiaja
92(100.0%)
 0 (0.0%)
geo_from_source [logical] 1. TRUE
92(100.0%)
 0 (0.0%)