This report describes standardized data for “Assessment of comparision between Polyploid Varieties of Cassava for high yield and disease resistance in an Preliminary Yield Trial (18 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 (2020). Assessment of comparision between Polyploid Varieties of Cassava for high yield and disease resistance in an Preliminary Yield Trial (18 clones) in Ibadan 1993/1994 Breeding Season. International Institute of Tropical Agriculture (IITA) . Not versioned. doi:10.25502/9W24-A767

The dataset has 53 records and 24 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 yield_part N_fertilizer P_fertilizer K_fertilizer irrigated plot_length plot_width
Nigeria Ibadan 3.94704 7.37754 TRUE 93PPCOMP18IB 1993 NA FALSE FALSE 1 cassava IITA-TMS-IBA88112-7(3X) NA 1364 roots NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93PPCOMP18IB 1993 NA FALSE FALSE 1 cassava IITA-TMS-IBA30572(2X) NA 117456 roots NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93PPCOMP18IB 1993 NA FALSE FALSE 1 cassava IITA-TMS-IBA30572(4X) NA 9728 roots NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93PPCOMP18IB 1993 NA FALSE FALSE 1 cassava IITA-TMS-IBA4(2)1425NP(2X) NA 1489725 roots NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93PPCOMP18IB 1993 NA FALSE FALSE 1 cassava IITA-TMS-IBA4(2)1425NP(4X) NA 1489726 roots NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93PPCOMP18IB 1993 NA FALSE FALSE 1 cassava IITA-TMS-IBA4(2)1425PUB(2X) NA 1489727 roots NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93PPCOMP18IB 1993 NA FALSE FALSE 1 cassava IITA-TMS-IBA4(2)1425PUB(4X) NA 1489728 roots NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93PPCOMP18IB 1993 NA FALSE FALSE 1 cassava IITA-TMS-IBA8101623(4X) NA 264 roots NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93PPCOMP18IB 1993 NA FALSE FALSE 1 cassava IITA-TMS-IBA8400136(4X) NA 272 roots NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93PPCOMP18IB 1993 NA FALSE FALSE 1 cassava IITA-TMS-IBA8400316(4X) NA 1351 roots NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93PPCOMP18IB 1993 NA FALSE FALSE 1 cassava IITA-TMS-IBA8700018-28(3X) NA 1340373 roots NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93PPCOMP18IB 1993 NA FALSE FALSE 1 cassava IITA-TMS-IBA8800001-2(3X) NA 1340370 roots NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93PPCOMP18IB 1993 NA FALSE FALSE 1 cassava IITA-TMS-IBA91934(2X) NA 698457 roots NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93PPCOMP18IB 1993 NA FALSE FALSE 1 cassava IITA-TMS-IBA91934(4X) NA 9827 roots NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93PPCOMP18IB 1993 NA FALSE FALSE 1 cassava IITA-TMS-IBA91934-CTR-5(4X) NA 1340374 roots NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93PPCOMP18IB 1993 NA FALSE FALSE 1 cassava IITA-TMS-IBA91934-CTR-9(4X) NA 1340375 roots NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93PPCOMP18IB 1993 NA FALSE FALSE 1 cassava SOMATIC_DIP(2X) NA 1340372 roots NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93PPCOMP18IB 1993 NA FALSE FALSE 1 cassava SOMATIC_TET(4X) NA 1340371 roots NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93PPCOMP18IB 1993 NA FALSE FALSE 2 cassava IITA-TMS-IBA88112-7(3X) NA 1364 roots NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93PPCOMP18IB 1993 NA FALSE FALSE 2 cassava IITA-TMS-IBA30572(2X) NA 117456 roots NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93PPCOMP18IB 1993 NA FALSE FALSE 2 cassava IITA-TMS-IBA30572(4X) NA 9728 roots NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93PPCOMP18IB 1993 NA FALSE FALSE 2 cassava IITA-TMS-IBA4(2)1425NP(2X) NA 1489725 roots NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93PPCOMP18IB 1993 NA FALSE FALSE 2 cassava IITA-TMS-IBA4(2)1425NP(4X) NA 1489726 roots NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93PPCOMP18IB 1993 NA FALSE FALSE 2 cassava IITA-TMS-IBA4(2)1425PUB(2X) NA 1489727 roots NA NA NA NA NA NA
Nigeria Ibadan 3.94704 7.37754 TRUE 93PPCOMP18IB 1993 NA FALSE FALSE 2 cassava IITA-TMS-IBA4(2)1425PUB(4X) NA 1489728 roots NA NA NA NA NA NA


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


The standardization script does not emit non-compliance warnings.

The overall quality of the dataset, given the completeness of required variables was 4.4 on a scale of 10. See the table below

variable completeness (%)
planting_date 100
harvest_date 0
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
53(100.0%)
 0 (0.0%)
location [character] 1. Ibadan
53(100.0%)
 0 (0.0%)
geo_from_source [logical] 1. TRUE
53(100.0%)
 0 (0.0%)
trial_id [character] 1. 93PPCOMP18IB
53(100.0%)
 0 (0.0%)
planting_date [integer] 1 distinct value
1993:53(100.0%)
 0 (0.0%)
harvest_date [logical]
All NA's
 53 (100.0%)
on_farm [logical] 1. FALSE
53(100.0%)
 0 (0.0%)
is_survey [logical] 1. FALSE
53(100.0%)
 0 (0.0%)
rep [integer]
Mean (sd) : 2 (0.8)
min ≤ med ≤ max:
1 ≤ 2 ≤ 3
IQR (CV) : 2 (0.4)
1:18(34.0%)
2:18(34.0%)
3:17(32.1%)
 0 (0.0%)
crop [character] 1. cassava
53(100.0%)
 0 (0.0%)
variety [character]
1. IITA-TMS-IBA30572(2X
2. IITA-TMS-IBA30572(4X
3. IITA-TMS-IBA4(2)1425
4. IITA-TMS-IBA4(2)1425
5. IITA-TMS-IBA4(2)1425
6. IITA-TMS-IBA8101623(
7. IITA-TMS-IBA8400136(
8. IITA-TMS-IBA8400316(
9. IITA-TMS-IBA8700018-
10. IITA-TMS-IBA8800001-
[ 9 others ]
3(5.7%)
3(5.7%)
3(5.7%)
3(5.7%)
3(5.7%)
3(5.7%)
3(5.7%)
3(5.7%)
3(5.7%)
3(5.7%)
23(43.4%)
 0 (0.0%)
variety_alt [logical]
All NA's
 53 (100.0%)
variety_code [integer]
Mean (sd) : 822538.2 (682625.5)
min ≤ med ≤ max:
264 ≤ 1340370 ≤ 1905042
IQR (CV) : 1330647 (0.8)
 19 distinct values 0 (0.0%)
yield_part [character] 1. roots
53(100.0%)
 0 (0.0%)
N_fertilizer [logical]
All NA's
 53 (100.0%)
P_fertilizer [logical]
All NA's
 53 (100.0%)
K_fertilizer [logical]
All NA's
 53 (100.0%)
irrigated [logical]
All NA's
 53 (100.0%)
plot_length [logical]
All NA's
 53 (100.0%)
plot_width [logical]
All NA's
 53 (100.0%)