This report describes standardized data for “Assessment of Varieties of Cassava for high yield and disease resistance using Local germplasm lines (430 clones) in Ibadan in 1999/2000 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 (2000). Assessment of Varieties of Cassava for high yield and disease resistance using Local germplasm lines (430 clones) in Ibadan in 1999/2000 Breeding Season. International Institute of Tropical Agriculture (IITA). doi:10.25502/HS5H-HM36

The dataset has 468 records and 27 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 yield_part yield N_fertilizer P_fertilizer K_fertilizer irrigated plot_length plot_width
Nigeria Ibadan 3.94704 7.37754 TRUE 99locgermIB 1999-07-16 2000-10-11 FALSE FALSE 1 cassava TMEB123 NA 97935 NA 800 roots 800 NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 99locgermIB 1999-07-16 2000-10-11 FALSE FALSE 1 cassava TMEB124 NA 699308 NA NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 99locgermIB 1999-07-16 2000-10-11 FALSE FALSE 1 cassava TMEB125 NA 128847 3.01 8400 roots 8400 NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 99locgermIB 1999-07-16 2000-10-11 FALSE FALSE 1 cassava TMEB126 NA 97936 NA NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 99locgermIB 1999-07-16 2000-10-11 FALSE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 2.49 6000 roots 6000 NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 99locgermIB 1999-07-16 2000-10-11 FALSE FALSE 1 cassava TMEB127 NA 97937 4.92 12400 roots 12400 NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 99locgermIB 1999-07-16 2000-10-11 FALSE FALSE 1 cassava TMEB128 NA 97938 2.63 6000 roots 6000 NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 99locgermIB 1999-07-16 2000-10-11 FALSE FALSE 1 cassava TMEB129 NA 97939 1.73 4000 roots 4000 NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 99locgermIB 1999-07-16 2000-10-11 FALSE FALSE 1 cassava TMEB130 NA 97940 2.30 6000 roots 6000 NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 99locgermIB 1999-07-16 2000-10-11 FALSE FALSE 1 cassava TMEB131 NA 97941 1.62 4000 roots 4000 NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 99locgermIB 1999-07-16 2000-10-11 FALSE FALSE 1 cassava TMEB9 NA 39684 5.01 13000 roots 13000 NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 99locgermIB 1999-07-16 2000-10-11 FALSE FALSE 1 cassava TMEB132 NA 97942 2.82 7600 roots 7600 NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 99locgermIB 1999-07-16 2000-10-11 FALSE FALSE 1 cassava TMEB133 NA 97943 4.01 10000 roots 10000 NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 99locgermIB 1999-07-16 2000-10-11 FALSE FALSE 1 cassava TMEB134 NA 97944 3.46 10000 roots 10000 NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 99locgermIB 1999-07-16 2000-10-11 FALSE FALSE 1 cassava TMEB135 NA 97945 3.27 8800 roots 8800 NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 99locgermIB 1999-07-16 2000-10-11 FALSE FALSE 1 cassava TMEB136 NA 97946 3.78 10800 roots 10800 NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 99locgermIB 1999-07-16 2000-10-11 FALSE FALSE 1 cassava TMEB137 NA 97947 3.61 9600 roots 9600 NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 99locgermIB 1999-07-16 2000-10-11 FALSE FALSE 1 cassava TMEB138 NA 97948 0.14 400 roots 400 NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 99locgermIB 1999-07-16 2000-10-11 FALSE FALSE 1 cassava TMEB139 NA 97949 2.82 8000 roots 8000 NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 99locgermIB 1999-07-16 2000-10-11 FALSE FALSE 1 cassava TMEB1 NA 39629 5.03 11600 roots 11600 NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 99locgermIB 1999-07-16 2000-10-11 FALSE FALSE 1 cassava TMEB140 NA 679089 2.33 6000 roots 6000 NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 99locgermIB 1999-07-16 2000-10-11 FALSE FALSE 1 cassava TMEB10 NA 97867 2.47 6200 roots 6200 NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 99locgermIB 1999-07-16 2000-10-11 FALSE FALSE 1 cassava TMEB141 NA 807586 0.42 1200 roots 1200 NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 99locgermIB 1999-07-16 2000-10-11 FALSE FALSE 1 cassava TMEB144 NA 807587 NA NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 99locgermIB 1999-07-16 2000-10-11 FALSE FALSE 1 cassava TMEB145 NA 39642 NA NA roots NA NA NA NA NA NA NA


The observations are for 1 locations, for which we have 1 unique mapped locations.


The standardization script emits the following non-compliance warnings.

message
NA in: 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
468(100.0%)
 0 (0.0%)
location [character] 1. Ibadan
468(100.0%)
 0 (0.0%)
geo_from_source [logical] 1. TRUE
468(100.0%)
 0 (0.0%)
trial_id [character] 1. 99locgermIB
468(100.0%)
 0 (0.0%)
planting_date [character] 1. 1999-07-16
468(100.0%)
 0 (0.0%)
harvest_date [character] 1. 2000-10-11
468(100.0%)
 0 (0.0%)
on_farm [logical] 1. FALSE
468(100.0%)
 0 (0.0%)
is_survey [logical] 1. FALSE
468(100.0%)
 0 (0.0%)
rep [integer] 1 distinct value
1:468(100.0%)
 0 (0.0%)
crop [character] 1. cassava
468(100.0%)
 0 (0.0%)
variety [character]
1. TMEB1
2. IITA-TMS-IBA30572
3. PRECOSE-DE-ANGOLA
4. TMEB10
5. TMEB100
6. TMEB102
7. TMEB103
8. TMEB104
9. TMEB107
10. TMEB109
[ 421 others ]
20(4.3%)
19(4.1%)
1(0.2%)
1(0.2%)
1(0.2%)
1(0.2%)
1(0.2%)
1(0.2%)
1(0.2%)
1(0.2%)
421(90.0%)
 0 (0.0%)
variety_alt [logical]
All NA's
 468 (100.0%)
variety_code [integer]
Mean (sd) : 243881.5 (311073.2)
min ≤ med ≤ max:
5 ≤ 98026 ≤ 1620191
IQR (CV) : 738.5 (1.3)
 431 distinct values 0 (0.0%)
dmy_storage [numeric]
Mean (sd) : 2.4 (1.7)
min ≤ med ≤ max:
0.1 ≤ 2 ≤ 10.1
IQR (CV) : 2.4 (0.7)
 234 distinct values 121 (25.9%)
fwy_storage [integer]
Mean (sd) : 5498.2 (4317.6)
min ≤ med ≤ max:
200 ≤ 4400 ≤ 26400
IQR (CV) : 6000 (0.8)
 53 distinct values 87 (18.6%)
yield_part [character] 1. roots
468(100.0%)
 0 (0.0%)
yield [integer]
Mean (sd) : 5498.2 (4317.6)
min ≤ med ≤ max:
200 ≤ 4400 ≤ 26400
IQR (CV) : 6000 (0.8)
 53 distinct values 87 (18.6%)
N_fertilizer [logical]
All NA's
 468 (100.0%)
P_fertilizer [logical]
All NA's
 468 (100.0%)
K_fertilizer [logical]
All NA's
 468 (100.0%)
irrigated [logical]
All NA's
 468 (100.0%)
plot_length [logical]
All NA's
 468 (100.0%)
plot_width [logical]
All NA's
 468 (100.0%)