This report describes standardized data for “Assessment of Varieties of Cassava for diseases and pests of 30 staygreen genotypes at Zaria in 1995/96 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 Varieties of Cassava for diseases and pests of 30 staygreen genotypes at Zaria in 1995/96 Breeding season. International Institute of Tropical Agriculture (IITA). Not versioned. doi:10.25502/4NKC-NM48

The dataset has 120 records and 29 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 fwy_residue yield_part yield N_fertilizer P_fertilizer K_fertilizer irrigated plot_length plot_width harvest_index
Nigeria Zaria 7.71995 11.0855 TRUE 05uyt30sgZA 2005 NA FALSE FALSE 1 cassava IITA-TMS-IBA000363 NA 1253 2.8 7900 NA roots 7900 NA NA NA NA NA NA 0.4
Nigeria Zaria 7.71995 11.0855 TRUE 05uyt30sgZA 2005 NA FALSE FALSE 1 cassava IITA-TMS-IBA010014 NA 40180 2.3 6100 NA roots 6100 NA NA NA NA NA NA 0.6
Nigeria Zaria 7.71995 11.0855 TRUE 05uyt30sgZA 2005 NA FALSE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 6.7 18800 NA roots 18800 NA NA NA NA NA NA 0.6
Nigeria Zaria 7.71995 11.0855 TRUE 05uyt30sgZA 2005 NA FALSE FALSE 1 cassava IITA-TMS-IBA9102322 NA 372 7.7 18800 NA roots 18800 NA NA NA NA NA NA 0.6
Nigeria Zaria 7.71995 11.0855 TRUE 05uyt30sgZA 2005 NA FALSE FALSE 1 cassava IITA-TMS-IBA9102324 NA 374 4.3 12500 NA roots 12500 NA NA NA NA NA NA 0.6
Nigeria Zaria 7.71995 11.0855 TRUE 05uyt30sgZA 2005 NA FALSE FALSE 1 cassava IITA-TMS-IBA91934 NA 380 1.1 3800 NA roots 3800 NA NA NA NA NA NA 0.5
Nigeria Zaria 7.71995 11.0855 TRUE 05uyt30sgZA 2005 NA FALSE FALSE 1 cassava IITA-TMS-IBA920067 NA 392 3.3 9400 NA roots 9400 NA NA NA NA NA NA 0.6
Nigeria Zaria 7.71995 11.0855 TRUE 05uyt30sgZA 2005 NA FALSE FALSE 1 cassava IITA-TMS-IBA920326 NA 396 2.0 5600 NA roots 5600 NA NA NA NA NA NA 0.6
Nigeria Zaria 7.71995 11.0855 TRUE 05uyt30sgZA 2005 NA FALSE FALSE 1 cassava IITA-TMS-IBA920342 NA 398 0.8 2500 NA roots 2500 NA NA NA NA NA NA 0.7
Nigeria Zaria 7.71995 11.0855 TRUE 05uyt30sgZA 2005 NA FALSE FALSE 1 cassava IITA-TMS-IBA940020 NA 491 6.8 18800 NA roots 18800 NA NA NA NA NA NA 0.7
Nigeria Zaria 7.71995 11.0855 TRUE 05uyt30sgZA 2005 NA FALSE FALSE 1 cassava IITA-TMS-IBA940026 NA 493 3.0 7800 NA roots 7800 NA NA NA NA NA NA 0.6
Nigeria Zaria 7.71995 11.0855 TRUE 05uyt30sgZA 2005 NA FALSE FALSE 1 cassava IITA-TMS-IBA950166 NA 526 7.5 25000 NA roots 25000 NA NA NA NA NA NA 0.6
Nigeria Zaria 7.71995 11.0855 TRUE 05uyt30sgZA 2005 NA FALSE FALSE 1 cassava IITA-TMS-IBA950289 NA 534 9.9 28100 NA roots 28100 NA NA NA NA NA NA 0.6
Nigeria Zaria 7.71995 11.0855 TRUE 05uyt30sgZA 2005 NA FALSE FALSE 1 cassava IITA-TMS-IBA960603 NA 627 6.2 20000 NA roots 20000 NA NA NA NA NA NA 0.5
Nigeria Zaria 7.71995 11.0855 TRUE 05uyt30sgZA 2005 NA FALSE FALSE 1 cassava IITA-TMS-IBA961642 NA 9 5.9 20000 NA roots 20000 NA NA NA NA NA NA 0.5
Nigeria Zaria 7.71995 11.0855 TRUE 05uyt30sgZA 2005 NA FALSE FALSE 1 cassava IITA-TMS-IBA961672 NA 1627 5.9 16300 NA roots 16300 NA NA NA NA NA NA 0.6
Nigeria Zaria 7.71995 11.0855 TRUE 05uyt30sgZA 2005 NA FALSE FALSE 1 cassava IITA-TMS-IBA980510 NA 1664 3.2 11300 NA roots 11300 NA NA NA NA NA NA 0.7
Nigeria Zaria 7.71995 11.0855 TRUE 05uyt30sgZA 2005 NA FALSE FALSE 1 cassava IITA-TMS-IBA980581 NA 723 7.7 25600 NA roots 25600 NA NA NA NA NA NA 0.6
Nigeria Zaria 7.71995 11.0855 TRUE 05uyt30sgZA 2005 NA FALSE FALSE 1 cassava IITA-TMS-IBA982101 NA 725 2.9 7700 NA roots 7700 NA NA NA NA NA NA 0.6
Nigeria Zaria 7.71995 11.0855 TRUE 05uyt30sgZA 2005 NA FALSE FALSE 1 cassava IITA-TMS-IBA982226 NA 728 3.7 12500 NA roots 12500 NA NA NA NA NA NA 0.6
Nigeria Zaria 7.71995 11.0855 TRUE 05uyt30sgZA 2005 NA FALSE FALSE 1 cassava IITA-TMS-IBA990222 NA 1678 6.7 18800 NA roots 18800 NA NA NA NA NA NA 0.7
Nigeria Zaria 7.71995 11.0855 TRUE 05uyt30sgZA 2005 NA FALSE FALSE 1 cassava IITA-TMS-IBA990240 NA 1680 9.7 26300 NA roots 26300 NA NA NA NA NA NA 0.7
Nigeria Zaria 7.71995 11.0855 TRUE 05uyt30sgZA 2005 NA FALSE FALSE 1 cassava IITA-TMS-IBA990554 NA 1694 4.7 11300 NA roots 11300 NA NA NA NA NA NA 0.7
Nigeria Zaria 7.71995 11.0855 TRUE 05uyt30sgZA 2005 NA FALSE FALSE 1 cassava IITA-TMS-MM961751 NA 1776 2.1 6300 NA roots 6300 NA NA NA NA NA NA 0.3
Nigeria Zaria 7.71995 11.0855 TRUE 05uyt30sgZA 2005 NA FALSE FALSE 1 cassava IITA-TMS-MM964496 NA 1783 NA 8800 NA roots 8800 NA NA NA NA NA NA 0.5


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
120(100.0%)
 0 (0.0%)
location [character] 1. Zaria
120(100.0%)
 0 (0.0%)
geo_from_source [logical] 1. TRUE
120(100.0%)
 0 (0.0%)
trial_id [character] 1. 05uyt30sgZA
120(100.0%)
 0 (0.0%)
planting_date [integer] 1 distinct value
2005:120(100.0%)
 0 (0.0%)
harvest_date [logical]
All NA's
 120 (100.0%)
on_farm [logical] 1. FALSE
120(100.0%)
 0 (0.0%)
is_survey [logical] 1. FALSE
120(100.0%)
 0 (0.0%)
rep [integer]
Mean (sd) : 2.5 (1.1)
min ≤ med ≤ max:
1 ≤ 2.5 ≤ 4
IQR (CV) : 1.5 (0.4)
1:30(25.0%)
2:30(25.0%)
3:30(25.0%)
4:30(25.0%)
 0 (0.0%)
crop [character] 1. cassava
120(100.0%)
 0 (0.0%)
variety [character]
1. IITA-TMS-IBA000363
2. IITA-TMS-IBA010014
3. IITA-TMS-IBA30572
4. IITA-TMS-IBA9102322
5. IITA-TMS-IBA9102324
6. IITA-TMS-IBA91934
7. IITA-TMS-IBA920067
8. IITA-TMS-IBA920326
9. IITA-TMS-IBA920342
10. IITA-TMS-IBA940020
[ 20 others ]
4(3.3%)
4(3.3%)
4(3.3%)
4(3.3%)
4(3.3%)
4(3.3%)
4(3.3%)
4(3.3%)
4(3.3%)
4(3.3%)
80(66.7%)
 0 (0.0%)
variety_alt [logical]
All NA's
 120 (100.0%)
variety_code [integer]
Mean (sd) : 6124.1 (15547.5)
min ≤ med ≤ max:
5 ≤ 726.5 ≤ 75208
IQR (CV) : 1378 (2.5)
 30 distinct values 0 (0.0%)
dmy_storage [numeric]
Mean (sd) : 4 (2.2)
min ≤ med ≤ max:
0.5 ≤ 3.6 ≤ 9.9
IQR (CV) : 3 (0.6)
 37 distinct values 61 (50.8%)
fwy_storage [integer]
Mean (sd) : 10887.5 (6071.3)
min ≤ med ≤ max:
1300 ≤ 10750 ≤ 28100
IQR (CV) : 7500 (0.6)
 54 distinct values 0 (0.0%)
fwy_residue [logical]
All NA's
 120 (100.0%)
yield_part [character] 1. roots
120(100.0%)
 0 (0.0%)
yield [integer]
Mean (sd) : 10887.5 (6071.3)
min ≤ med ≤ max:
1300 ≤ 10750 ≤ 28100
IQR (CV) : 7500 (0.6)
 54 distinct values 0 (0.0%)
N_fertilizer [logical]
All NA's
 120 (100.0%)
P_fertilizer [logical]
All NA's
 120 (100.0%)
K_fertilizer [logical]
All NA's
 120 (100.0%)
irrigated [logical]
All NA's
 120 (100.0%)
plot_length [logical]
All NA's
 120 (100.0%)
plot_width [logical]
All NA's
 120 (100.0%)
harvest_index [numeric]
Mean (sd) : 0.6 (0.1)
min ≤ med ≤ max:
0.3 ≤ 0.6 ≤ 0.8
IQR (CV) : 0.1 (0.2)
 6 distinct values 60 (50.0%)