This report describes standardized data for “Assessment of Polyploid Varieties of Cassava for high yield and disease resistance in an Uniform Yield Trial (27 clones) in Ibadan 1993/1994 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 (1994). Assessment of Polyploid Varieties of Cassava for high yield and disease resistance in an Uniform Yield Trial (27 clones) in Ibadan 1993/1994 Breeding Season. International Institute of Tropical Agriculture (IITA). Not versioned. doi:10.25502/V6B7-G113

The dataset has 63 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 fwy_storage fwy_residue yield_part yield N_fertilizer P_fertilizer K_fertilizer irrigated plot_length plot_width
Nigeria Ibadan 3.94704 7.37754 TRUE 93uyt27ppIB 1993-09-30 1994-09-29 FALSE FALSE 1 cassava IITA-TMS-IBA30001(2X)XIITA-TMS-IBA8400136(4X) NA 1375569 NA NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93uyt27ppIB 1993-09-30 1994-09-29 FALSE FALSE 1 cassava IITA-TMS-IBA30555(2X)XSOMTET NA 1375570 NA NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93uyt27ppIB 1993-09-30 1994-09-29 FALSE FALSE 1 cassava IITA-TMS-IBA30555(4X)XSOMTET NA 1375571 NA NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93uyt27ppIB 1993-09-30 1994-09-29 FALSE FALSE 1 cassava IITA-TMS-IBA30572(2X) NA 117456 NA NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93uyt27ppIB 1993-09-30 1994-09-29 FALSE FALSE 1 cassava IITA-TMS-IBA30572(2X)XIITA-TMS-IBA4(2)1425(2X) NA 1375572 NA NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93uyt27ppIB 1993-09-30 1994-09-29 FALSE FALSE 1 cassava IITA-TMS-IBA30572(2X)XIITA-TMS-IBA8101623(4X) NA 1375573 NA NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93uyt27ppIB 1993-09-30 1994-09-29 FALSE FALSE 1 cassava IITA-TMS-IBA42025(2X)XM.GLAZ(2X) NA 1375576 NA NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93uyt27ppIB 1993-09-30 1994-09-29 FALSE FALSE 1 cassava IITA-TMS-IBA42025(2X)XSOMTET NA 1375577 NA NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93uyt27ppIB 1993-09-30 1994-09-29 FALSE FALSE 1 cassava IITA-TMS-IBA4(2)1425(2X) NA 117467 NA NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93uyt27ppIB 1993-09-30 1994-09-29 FALSE FALSE 1 cassava IITA-TMS-IBA4(2)1425(2X)XIITA-TMS-IBA30572(2X) NA 1375574 NA NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93uyt27ppIB 1993-09-30 1994-09-29 FALSE FALSE 1 cassava IITA-TMS-IBA4(2)1425(2X)XIITA-TMS-IBA30572(4X) NA 1375575 NA NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93uyt27ppIB 1993-09-30 1994-09-29 FALSE FALSE 1 cassava IITA-TMS-IBA58308(2X)XIITA-TMS-IBA8400136 NA 1375578 NA NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93uyt27ppIB 1993-09-30 1994-09-29 FALSE FALSE 1 cassava IITA-TMS-IBA8400136(4X) NA 272 NA NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93uyt27ppIB 1993-09-30 1994-09-29 FALSE FALSE 1 cassava IITA-TMS-IBA8400136(4X)XIITA-TMS-IBA42025(2X) NA 1375579 NA NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93uyt27ppIB 1993-09-30 1994-09-29 FALSE FALSE 1 cassava IITA-TMS-IBA8400316(4X) NA 1351 NA NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93uyt27ppIB 1993-09-30 1994-09-29 FALSE FALSE 1 cassava IITA-TMS-IBA8400316(4X)XSOMTET NA 1375580 NA NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93uyt27ppIB 1993-09-30 1994-09-29 FALSE FALSE 1 cassava IITA-TMS-IBA8401623(4X) NA 1375581 NA NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93uyt27ppIB 1993-09-30 1994-09-29 FALSE FALSE 1 cassava IITA-TMS-IBA8900003-34 NA 1375582 NA NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93uyt27ppIB 1993-09-30 1994-09-29 FALSE FALSE 1 cassava IITA-TMS-IBA8900003-4 NA 1337656 NA NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93uyt27ppIB 1993-09-30 1994-09-29 FALSE FALSE 1 cassava IITA-TMS-IBA91934(2X) NA 698457 NA NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93uyt27ppIB 1993-09-30 1994-09-29 FALSE FALSE 1 cassava SOM.TET(4X) NA 1334325 NA NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93uyt27ppIB 1993-09-30 1994-09-29 FALSE FALSE 2 cassava IITA-TMS-IBA30001(2X)XIITA-TMS-IBA8400136(4X) NA 1375569 NA NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93uyt27ppIB 1993-09-30 1994-09-29 FALSE FALSE 2 cassava IITA-TMS-IBA30555(2X)XSOMTET NA 1375570 NA NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93uyt27ppIB 1993-09-30 1994-09-29 FALSE FALSE 2 cassava IITA-TMS-IBA30555(4X)XSOMTET NA 1375571 NA NA roots NA NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93uyt27ppIB 1993-09-30 1994-09-29 FALSE FALSE 2 cassava IITA-TMS-IBA30572(2X) NA 117456 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
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
63(100.0%)
 0 (0.0%)
location [character] 1. Ibadan
63(100.0%)
 0 (0.0%)
geo_from_source [logical] 1. TRUE
63(100.0%)
 0 (0.0%)
trial_id [character] 1. 93uyt27ppIB
63(100.0%)
 0 (0.0%)
planting_date [character] 1. 1993-09-30
63(100.0%)
 0 (0.0%)
harvest_date [character] 1. 1994-09-29
63(100.0%)
 0 (0.0%)
on_farm [logical] 1. FALSE
63(100.0%)
 0 (0.0%)
is_survey [logical] 1. FALSE
63(100.0%)
 0 (0.0%)
rep [integer]
Mean (sd) : 2 (0.8)
min ≤ med ≤ max:
1 ≤ 2 ≤ 3
IQR (CV) : 2 (0.4)
1:21(33.3%)
2:21(33.3%)
3:21(33.3%)
 0 (0.0%)
crop [character] 1. cassava
63(100.0%)
 0 (0.0%)
variety [character]
1. IITA-TMS-IBA30001(2X
2. IITA-TMS-IBA30555(2X
3. IITA-TMS-IBA30555(4X
4. IITA-TMS-IBA30572(2X
5. IITA-TMS-IBA30572(2X
6. IITA-TMS-IBA30572(2X
7. IITA-TMS-IBA4(2)1425
8. IITA-TMS-IBA4(2)1425
9. IITA-TMS-IBA4(2)1425
10. IITA-TMS-IBA42025(2X
[ 11 others ]
3(4.8%)
3(4.8%)
3(4.8%)
3(4.8%)
3(4.8%)
3(4.8%)
3(4.8%)
3(4.8%)
3(4.8%)
3(4.8%)
33(52.4%)
 0 (0.0%)
variety_alt [logical]
All NA's
 63 (100.0%)
variety_code [integer]
Mean (sd) : 1088812 (524268)
min ≤ med ≤ max:
272 ≤ 1375572 ≤ 1375582
IQR (CV) : 41252 (0.5)
 21 distinct values 0 (0.0%)
fwy_storage [logical]
All NA's
 63 (100.0%)
fwy_residue [logical]
All NA's
 63 (100.0%)
yield_part [character] 1. roots
63(100.0%)
 0 (0.0%)
yield [logical]
All NA's
 63 (100.0%)
N_fertilizer [logical]
All NA's
 63 (100.0%)
P_fertilizer [logical]
All NA's
 63 (100.0%)
K_fertilizer [logical]
All NA's
 63 (100.0%)
irrigated [logical]
All NA's
 63 (100.0%)
plot_length [logical]
All NA's
 63 (100.0%)
plot_width [logical]
All NA's
 63 (100.0%)