This report describes standardized data for “Assessment of Varieties of Cassava for high yield and disease resistance using improved germplasm lines (418 clones) at Warri in 1997/98 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 (1998). Assessment of Varieties of Cassava for high yield and disease resistance using improved germplasm lines (418 clones) at Warri in 1997/98 Breeding Season. International Institute of Tropical Agriculture (IITA). Not versioned. doi:10.25502/BM6B-ZX36

The dataset has 378 records and 28 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 fwy_storage fwy_residue yield_part yield yield_moisture N_fertilizer P_fertilizer K_fertilizer irrigated plot_length plot_width country location longitude latitude geo_from_source
97impgermpWA 1997-06-25 1998-05-12 FALSE FALSE 1 cassava IITA-TMS-IBA8900660 NA 808300 NA NA roots NA NA NA NA NA NA NA NA Nigeria Warri 5.7932 5.5544 TRUE
97impgermpWA 1997-06-25 1998-05-12 FALSE FALSE 1 cassava IITA-TMS-IBA8900088 NA 808298 NA NA roots NA NA NA NA NA NA NA NA Nigeria Warri 5.7932 5.5544 TRUE
97impgermpWA 1997-06-25 1998-05-12 FALSE FALSE 1 cassava IITA-TMS-IBA8901901 NA 682374 NA NA roots NA NA NA NA NA NA NA NA Nigeria Warri 5.7932 5.5544 TRUE
97impgermpWA 1997-06-25 1998-05-12 FALSE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 NA NA roots NA NA NA NA NA NA NA NA Nigeria Warri 5.7932 5.5544 TRUE
97impgermpWA 1997-06-25 1998-05-12 FALSE FALSE 1 cassava IITA-TMS-IBA8902193 NA 808312 NA NA roots NA NA NA NA NA NA NA NA Nigeria Warri 5.7932 5.5544 TRUE
97impgermpWA 1997-06-25 1998-05-12 FALSE FALSE 1 cassava IITA-TMS-IBA8900824 NA 808303 NA NA roots NA NA NA NA NA NA NA NA Nigeria Warri 5.7932 5.5544 TRUE
97impgermpWA 1997-06-25 1998-05-12 FALSE FALSE 1 cassava IITA-TMS-WAR1095-D NA 134 NA NA roots NA NA NA NA NA NA NA NA Nigeria Warri 5.7932 5.5544 TRUE
97impgermpWA 1997-06-25 1998-05-12 FALSE FALSE 1 cassava IITA-TMS-WAR4080 NA 136 NA NA roots NA NA NA NA NA NA NA NA Nigeria Warri 5.7932 5.5544 TRUE
97impgermpWA 1997-06-25 1998-05-12 FALSE FALSE 1 cassava IITA-TMS-WAR4488 NA 676864 NA NA roots NA NA NA NA NA NA NA NA Nigeria Warri 5.7932 5.5544 TRUE
97impgermpWA 1997-06-25 1998-05-12 FALSE FALSE 1 cassava IITA-TMS-WAR820249 NA 142 NA NA roots NA NA NA NA NA NA NA NA Nigeria Warri 5.7932 5.5544 TRUE
97impgermpWA 1997-06-25 1998-05-12 FALSE FALSE 1 cassava IITA-TMS-ONN8801043 NA 808351 NA NA roots NA NA NA NA NA NA NA NA Nigeria Warri 5.7932 5.5544 TRUE
97impgermpWA 1997-06-25 1998-05-12 FALSE FALSE 1 cassava IITA-TMS-MOK8200115 NA 808393 NA NA roots NA NA NA NA NA NA NA NA Nigeria Warri 5.7932 5.5544 TRUE
97impgermpWA 1997-06-25 1998-05-12 FALSE FALSE 1 cassava IITA-TMS-WAR820422 NA 144 NA NA roots NA NA NA NA NA NA NA NA Nigeria Warri 5.7932 5.5544 TRUE
97impgermpWA 1997-06-25 1998-05-12 FALSE FALSE 1 cassava IITA-TMS-IBA8500442 NA 808243 NA NA roots NA NA NA NA NA NA NA NA Nigeria Warri 5.7932 5.5544 TRUE
97impgermpWA 1997-06-25 1998-05-12 FALSE FALSE 1 cassava IITA-TMS-WAR820447 NA 146 NA NA roots NA NA NA NA NA NA NA NA Nigeria Warri 5.7932 5.5544 TRUE
97impgermpWA 1997-06-25 1998-05-12 FALSE FALSE 1 cassava TMEB1 NA 39629 NA NA roots NA NA NA NA NA NA NA NA Nigeria Warri 5.7932 5.5544 TRUE
97impgermpWA 1997-06-25 1998-05-12 FALSE FALSE 1 cassava IITA-TMS-WAR4092 NA 138 NA NA roots NA NA NA NA NA NA NA NA Nigeria Warri 5.7932 5.5544 TRUE
97impgermpWA 1997-06-25 1998-05-12 FALSE FALSE 1 cassava IITA-TMS-WAR1379 NA 1492589 NA NA roots NA NA NA NA NA NA NA NA Nigeria Warri 5.7932 5.5544 TRUE
97impgermpWA 1997-06-25 1998-05-12 FALSE FALSE 1 cassava IITA-TMS-IBA9001058 NA 308 NA NA roots NA NA NA NA NA NA NA NA Nigeria Warri 5.7932 5.5544 TRUE
97impgermpWA 1997-06-25 1998-05-12 FALSE FALSE 1 cassava IITA-TMS-IBA9100457 NA 802535 NA NA roots NA NA NA NA NA NA NA NA Nigeria Warri 5.7932 5.5544 TRUE
97impgermpWA 1997-06-25 1998-05-12 FALSE FALSE 1 cassava IITA-TMS-IBA920397 NA 400 NA NA roots NA NA NA NA NA NA NA NA Nigeria Warri 5.7932 5.5544 TRUE
97impgermpWA 1997-06-25 1998-05-12 FALSE FALSE 1 cassava IITA-TMS-IBA9100455 NA 91891 NA NA roots NA NA NA NA NA NA NA NA Nigeria Warri 5.7932 5.5544 TRUE
97impgermpWA 1997-06-25 1998-05-12 FALSE FALSE 1 cassava IITA-TMS-IBA9100438 NA 348 NA NA roots NA NA NA NA NA NA NA NA Nigeria Warri 5.7932 5.5544 TRUE
97impgermpWA 1997-06-25 1998-05-12 FALSE FALSE 1 cassava IITA-TMS-IBA9102030 NA 1181233 NA NA roots NA NA NA NA NA NA NA NA Nigeria Warri 5.7932 5.5544 TRUE
97impgermpWA 1997-06-25 1998-05-12 FALSE FALSE 1 cassava IITA-TMS-IBA9001204 NA 808277 NA NA roots NA NA NA NA NA NA NA NA Nigeria Warri 5.7932 5.5544 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
all NA yield

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. 97impgermpWA
378(100.0%)
 0 (0.0%)
planting_date [character] 1. 1997-06-25
378(100.0%)
 0 (0.0%)
harvest_date [character] 1. 1998-05-12
378(100.0%)
 0 (0.0%)
on_farm [logical] 1. FALSE
378(100.0%)
 0 (0.0%)
is_survey [logical] 1. FALSE
378(100.0%)
 0 (0.0%)
rep [integer] 1 distinct value
1:378(100.0%)
 0 (0.0%)
crop [character] 1. cassava
378(100.0%)
 0 (0.0%)
variety [character]
1. 50395
2. ICB5-10(80411)
3. ICB71693
4. IITA-TMS-IBA08300027
5. IITA-TMS-IBA084534
6. IITA-TMS-IBA08700690
7. IITA-TMS-IBA08801386
8. IITA-TMS-IBA08900023
9. IITA-TMS-IBA30001
10. IITA-TMS-IBA30040
[ 368 others ]
1(0.3%)
1(0.3%)
1(0.3%)
1(0.3%)
1(0.3%)
1(0.3%)
1(0.3%)
1(0.3%)
1(0.3%)
1(0.3%)
368(97.4%)
 0 (0.0%)
variety_alt [logical]
All NA's
 378 (100.0%)
variety_code [integer]
Mean (sd) : 689485.2 (443276.7)
min ≤ med ≤ max:
5 ≤ 808269.5 ≤ 1530876
IQR (CV) : 131544.8 (0.6)
 378 distinct values 0 (0.0%)
fwy_storage [logical]
All NA's
 378 (100.0%)
fwy_residue [logical]
All NA's
 378 (100.0%)
yield_part [character] 1. roots
378(100.0%)
 0 (0.0%)
yield [logical]
All NA's
 378 (100.0%)
yield_moisture [logical]
All NA's
 378 (100.0%)
N_fertilizer [logical]
All NA's
 378 (100.0%)
P_fertilizer [logical]
All NA's
 378 (100.0%)
K_fertilizer [logical]
All NA's
 378 (100.0%)
irrigated [logical]
All NA's
 378 (100.0%)
plot_length [logical]
All NA's
 378 (100.0%)
plot_width [logical]
All NA's
 378 (100.0%)
country [character] 1. Nigeria
378(100.0%)
 0 (0.0%)
location [character] 1. Warri
378(100.0%)
 0 (0.0%)
geo_from_source [logical] 1. TRUE
378(100.0%)
 0 (0.0%)