This report describes standardized data for “Assessment of Varieties of Cassava Land race extension for disease resistance in Preliminary Yield Trial (223 clones) in Ibadan 2003/2004 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 (2004). Assessment of Varieties of Cassava Land race extension for disease resistance in Preliminary Yield Trial (223 clones) in Ibadan 2003/2004 Breeding Season. International Institute of Tropical Agriculture (IITA). Not versioned. doi:10.25502/EBEA-TT38

The dataset has 433 records and 26 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 yield_part yield N_fertilizer P_fertilizer K_fertilizer irrigated plot_length plot_width
Nigeria Ibadan 3.94704 7.37754 TRUE 03pyt223LDRIB 2003-07-25 2004-07-22 FALSE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 03pyt223LDRIB 2003-07-25 2004-07-22 FALSE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 03pyt223LDRIB 2003-07-25 2004-07-22 FALSE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 03pyt223LDRIB 2003-07-25 2004-07-22 FALSE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 03pyt223LDRIB 2003-07-25 2004-07-22 FALSE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 03pyt223LDRIB 2003-07-25 2004-07-22 FALSE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 03pyt223LDRIB 2003-07-25 2004-07-22 FALSE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 03pyt223LDRIB 2003-07-25 2004-07-22 FALSE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 03pyt223LDRIB 2003-07-25 2004-07-22 FALSE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 03pyt223LDRIB 2003-07-25 2004-07-22 FALSE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 03pyt223LDRIB 2003-07-25 2004-07-22 FALSE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 03pyt223LDRIB 2003-07-25 2004-07-22 FALSE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 03pyt223LDRIB 2003-07-25 2004-07-22 FALSE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 03pyt223LDRIB 2003-07-25 2004-07-22 FALSE FALSE 1 cassava IITA-TMS-IBA9102324 NA 374 NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 03pyt223LDRIB 2003-07-25 2004-07-22 FALSE FALSE 1 cassava IITA-TMS-IBA9102324 NA 374 NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 03pyt223LDRIB 2003-07-25 2004-07-22 FALSE FALSE 1 cassava IITA-TMS-IBA9102324 NA 374 NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 03pyt223LDRIB 2003-07-25 2004-07-22 FALSE FALSE 1 cassava IITA-TMS-IBA9102324 NA 374 NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 03pyt223LDRIB 2003-07-25 2004-07-22 FALSE FALSE 1 cassava IITA-TMS-IBA9102324 NA 374 NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 03pyt223LDRIB 2003-07-25 2004-07-22 FALSE FALSE 1 cassava IITA-TMS-IBA9102324 NA 374 NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 03pyt223LDRIB 2003-07-25 2004-07-22 FALSE FALSE 1 cassava IITA-TMS-IBA9102324 NA 374 NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 03pyt223LDRIB 2003-07-25 2004-07-22 FALSE FALSE 1 cassava IITA-TMS-IBA9102324 NA 374 NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 03pyt223LDRIB 2003-07-25 2004-07-22 FALSE FALSE 1 cassava IITA-TMS-IBA9102324 NA 374 NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 03pyt223LDRIB 2003-07-25 2004-07-22 FALSE FALSE 1 cassava IITA-TMS-IBA9102324 NA 374 NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 03pyt223LDRIB 2003-07-25 2004-07-22 FALSE FALSE 1 cassava IITA-TMS-IBA9102324 NA 374 NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 03pyt223LDRIB 2003-07-25 2004-07-22 FALSE FALSE 1 cassava IITA-TMS-IBA9102324 NA 374 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
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
433(100.0%)
 0 (0.0%)
location [character] 1. Ibadan
433(100.0%)
 0 (0.0%)
geo_from_source [logical] 1. TRUE
433(100.0%)
 0 (0.0%)
trial_id [character] 1. 03pyt223LDRIB
433(100.0%)
 0 (0.0%)
planting_date [character] 1. 2003-07-25
433(100.0%)
 0 (0.0%)
harvest_date [character] 1. 2004-07-22
433(100.0%)
 0 (0.0%)
on_farm [logical] 1. FALSE
433(100.0%)
 0 (0.0%)
is_survey [logical] 1. FALSE
433(100.0%)
 0 (0.0%)
rep [integer]
Min : 1
Mean : 1.5
Max : 2
1:223(51.5%)
2:210(48.5%)
 0 (0.0%)
crop [character] 1. cassava
433(100.0%)
 0 (0.0%)
variety [character]
1. IITA-TMS-IBA30572
2. IITA-TMS-IBA9102324
3. TMEB117
4. TMEB228
5. TMEB822
6. PRECOSE-DE-ANGOLA
7. TMEB1
8. TMEB1010
9. TMEB11
10. TMEB1199
[ 181 others ]
23(5.3%)
23(5.3%)
22(5.1%)
3(0.7%)
3(0.7%)
2(0.5%)
2(0.5%)
2(0.5%)
2(0.5%)
2(0.5%)
349(80.6%)
 0 (0.0%)
variety_alt [logical]
All NA's
 433 (100.0%)
variety_code [integer]
Mean (sd) : 154098.9 (212044.7)
min ≤ med ≤ max:
5 ≤ 98017 ≤ 729615
IQR (CV) : 58589 (1.4)
 191 distinct values 0 (0.0%)
fwy_storage [logical]
All NA's
 433 (100.0%)
yield_part [character] 1. roots
433(100.0%)
 0 (0.0%)
yield [logical]
All NA's
 433 (100.0%)
N_fertilizer [logical]
All NA's
 433 (100.0%)
P_fertilizer [logical]
All NA's
 433 (100.0%)
K_fertilizer [logical]
All NA's
 433 (100.0%)
irrigated [logical]
All NA's
 433 (100.0%)
plot_length [logical]
All NA's
 433 (100.0%)
plot_width [logical]
All NA's
 433 (100.0%)