This report describes standardized data for “Assessment of Varieties of Cassava for high yield and disease resistance using Uniform Yield Trial (19 clones) Warri Selection in Warri 1999/2000 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 (2000). Assessment of Varieties of Cassava for high yield and disease resistance using Uniform Yield Trial (19 clones) Warri Selection in Warri 1999/2000 Breeding Season. International Institute of Tropical Agriculture (IITA). Not versioned. doi:10.25502/DYPX-7X23

The dataset has 38 records and 30 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 dmy_storage fwy_storage fwy_residue yield_part yield yield_moisture N_fertilizer P_fertilizer K_fertilizer irrigated plot_length plot_width harvest_index country location longitude latitude geo_from_source
99uyt19WRSelWR 1999-07-19 2000-08-12 FALSE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 3.60 9000 NA roots 9000 59.95 NA NA NA NA NA NA 0.60 Nigeria Warri 5.7932 5.5544 TRUE
99uyt19WRSelWR 1999-07-19 2000-08-12 FALSE FALSE 1 cassava IITA-TMS-IBA4(2)1425 NA 246 3.23 8100 NA roots 8100 60.10 NA NA NA NA NA NA 0.73 Nigeria Warri 5.7932 5.5544 TRUE
99uyt19WRSelWR 1999-07-19 2000-08-12 FALSE FALSE 1 cassava IITA-TMS-IBA8200058 NA 268 2.47 6800 NA roots 6800 63.69 NA NA NA NA NA NA 0.66 Nigeria Warri 5.7932 5.5544 TRUE
99uyt19WRSelWR 1999-07-19 2000-08-12 FALSE FALSE 1 cassava IITA-TMS-IBA940236 NA 698100 2.42 5500 NA roots 5500 56.07 NA NA NA NA NA NA 0.48 Nigeria Warri 5.7932 5.5544 TRUE
99uyt19WRSelWR 1999-07-19 2000-08-12 FALSE FALSE 1 cassava IITA-TMS-IBA940368 NA 802495 5.46 13000 NA roots 13000 57.97 NA NA NA NA NA NA 0.54 Nigeria Warri 5.7932 5.5544 TRUE
99uyt19WRSelWR 1999-07-19 2000-08-12 FALSE FALSE 1 cassava IITA-TMS-IBA960023 NA 578 2.71 10700 NA roots 10700 74.69 NA NA NA NA NA NA 0.60 Nigeria Warri 5.7932 5.5544 TRUE
99uyt19WRSelWR 1999-07-19 2000-08-12 FALSE FALSE 1 cassava IITA-TMS-IBA960304 NA 600 4.27 11000 NA roots 11000 61.20 NA NA NA NA NA NA 0.61 Nigeria Warri 5.7932 5.5544 TRUE
99uyt19WRSelWR 1999-07-19 2000-08-12 FALSE FALSE 1 cassava IITA-TMS-IBA960504 NA 805156 3.37 8600 NA roots 8600 60.78 NA NA NA NA NA NA 0.50 Nigeria Warri 5.7932 5.5544 TRUE
99uyt19WRSelWR 1999-07-19 2000-08-12 FALSE FALSE 1 cassava IITA-TMS-IBA960542 NA 805157 5.13 16600 NA roots 16600 69.12 NA NA NA NA NA NA 0.65 Nigeria Warri 5.7932 5.5544 TRUE
99uyt19WRSelWR 1999-07-19 2000-08-12 FALSE FALSE 1 cassava IITA-TMS-IBA960720 NA 805158 3.81 10000 NA roots 10000 61.86 NA NA NA NA NA NA 0.64 Nigeria Warri 5.7932 5.5544 TRUE
99uyt19WRSelWR 1999-07-19 2000-08-12 FALSE FALSE 1 cassava IITA-TMS-IBA960867 NA 1597 20.72 52700 NA roots 52700 60.69 NA NA NA NA NA NA 0.66 Nigeria Warri 5.7932 5.5544 TRUE
99uyt19WRSelWR 1999-07-19 2000-08-12 FALSE FALSE 1 cassava IITA-TMS-IBA961004 NA 805159 6.43 16700 NA roots 16700 61.52 NA NA NA NA NA NA 0.60 Nigeria Warri 5.7932 5.5544 TRUE
99uyt19WRSelWR 1999-07-19 2000-08-12 FALSE FALSE 1 cassava IITA-TMS-IBA961165 NA 1608 7.54 18800 NA roots 18800 59.91 NA NA NA NA NA NA 0.58 Nigeria Warri 5.7932 5.5544 TRUE
99uyt19WRSelWR 1999-07-19 2000-08-12 FALSE FALSE 1 cassava IITA-TMS-IBA961425 NA 805160 1.42 3600 NA roots 3600 60.68 NA NA NA NA NA NA 0.59 Nigeria Warri 5.7932 5.5544 TRUE
99uyt19WRSelWR 1999-07-19 2000-08-12 FALSE FALSE 1 cassava IITA-TMS-IBA961431 NA 1612 2.18 6300 NA roots 6300 65.42 NA NA NA NA NA NA 0.68 Nigeria Warri 5.7932 5.5544 TRUE
99uyt19WRSelWR 1999-07-19 2000-08-12 FALSE FALSE 1 cassava IITA-TMS-IBA961432 NA 1614 1.84 4600 NA roots 4600 59.93 NA NA NA NA NA NA 0.47 Nigeria Warri 5.7932 5.5544 TRUE
99uyt19WRSelWR 1999-07-19 2000-08-12 FALSE FALSE 1 cassava IITA-TMS-IBA961556 NA 1619 1.78 4600 NA roots 4600 61.26 NA NA NA NA NA NA 0.57 Nigeria Warri 5.7932 5.5544 TRUE
99uyt19WRSelWR 1999-07-19 2000-08-12 FALSE FALSE 1 cassava IITA-TMS-IBA961672 NA 1627 2.49 6700 NA roots 6700 62.78 NA NA NA NA NA NA 0.49 Nigeria Warri 5.7932 5.5544 TRUE
99uyt19WRSelWR 1999-07-19 2000-08-12 FALSE FALSE 1 cassava TMEB1 NA 39629 2.30 6100 NA roots 6100 62.35 NA NA NA NA NA NA 0.55 Nigeria Warri 5.7932 5.5544 TRUE
99uyt19WRSelWR 1999-07-19 2000-08-12 FALSE FALSE 2 cassava IITA-TMS-IBA30572 NA 5 2.97 7600 NA roots 7600 60.94 NA NA NA NA NA NA 0.72 Nigeria Warri 5.7932 5.5544 TRUE
99uyt19WRSelWR 1999-07-19 2000-08-12 FALSE FALSE 2 cassava IITA-TMS-IBA4(2)1425 NA 246 2.52 6500 NA roots 6500 61.20 NA NA NA NA NA NA 0.74 Nigeria Warri 5.7932 5.5544 TRUE
99uyt19WRSelWR 1999-07-19 2000-08-12 FALSE FALSE 2 cassava IITA-TMS-IBA8200058 NA 268 2.28 5800 NA roots 5800 60.70 NA NA NA NA NA NA 0.64 Nigeria Warri 5.7932 5.5544 TRUE
99uyt19WRSelWR 1999-07-19 2000-08-12 FALSE FALSE 2 cassava IITA-TMS-IBA940236 NA 698100 3.60 9100 NA roots 9100 60.39 NA NA NA NA NA NA 0.65 Nigeria Warri 5.7932 5.5544 TRUE
99uyt19WRSelWR 1999-07-19 2000-08-12 FALSE FALSE 2 cassava IITA-TMS-IBA940368 NA 802495 3.80 9900 NA roots 9900 61.63 NA NA NA NA NA NA 0.52 Nigeria Warri 5.7932 5.5544 TRUE
99uyt19WRSelWR 1999-07-19 2000-08-12 FALSE FALSE 2 cassava IITA-TMS-IBA960023 NA 578 3.28 12200 NA roots 12200 73.14 NA NA NA NA NA NA 0.62 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
out of bounds fwy_storage (3600, 52700)
datespan 38 harvest_date more than 366 days after planting_date

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. 99uyt19WRSelWR
38(100.0%)
 0 (0.0%)
planting_date [character] 1. 1999-07-19
38(100.0%)
 0 (0.0%)
harvest_date [character] 1. 2000-08-12
38(100.0%)
 0 (0.0%)
on_farm [logical] 1. FALSE
38(100.0%)
 0 (0.0%)
is_survey [logical] 1. FALSE
38(100.0%)
 0 (0.0%)
rep [integer]
Min : 1
Mean : 1.5
Max : 2
1:19(50.0%)
2:19(50.0%)
 0 (0.0%)
crop [character] 1. cassava
38(100.0%)
 0 (0.0%)
variety [character]
1. IITA-TMS-IBA30572
2. IITA-TMS-IBA4(2)1425
3. IITA-TMS-IBA8200058
4. IITA-TMS-IBA940236
5. IITA-TMS-IBA940368
6. IITA-TMS-IBA960023
7. IITA-TMS-IBA960304
8. IITA-TMS-IBA960504
9. IITA-TMS-IBA960542
10. IITA-TMS-IBA960720
[ 9 others ]
2(5.3%)
2(5.3%)
2(5.3%)
2(5.3%)
2(5.3%)
2(5.3%)
2(5.3%)
2(5.3%)
2(5.3%)
2(5.3%)
18(47.4%)
 0 (0.0%)
variety_alt [logical]
All NA's
 38 (100.0%)
variety_code [integer]
Mean (sd) : 293546.7 (384644.6)
min ≤ med ≤ max:
5 ≤ 1619 ≤ 805160
IQR (CV) : 803641.5 (1.3)
 19 distinct values 0 (0.0%)
dmy_storage [numeric]
Mean (sd) : 4.3 (3.6)
min ≤ med ≤ max:
1.4 ≤ 3.3 ≤ 20.7
IQR (CV) : 1.7 (0.8)
 36 distinct values 0 (0.0%)
fwy_storage [integer]
Mean (sd) : 11155.3 (8993.2)
min ≤ med ≤ max:
3600 ≤ 8500 ≤ 52700
IQR (CV) : 4425 (0.8)
 35 distinct values 0 (0.0%)
fwy_residue [logical]
All NA's
 38 (100.0%)
yield_part [character] 1. roots
38(100.0%)
 0 (0.0%)
yield [integer]
Mean (sd) : 11155.3 (8993.2)
min ≤ med ≤ max:
3600 ≤ 8500 ≤ 52700
IQR (CV) : 4425 (0.8)
 35 distinct values 0 (0.0%)
yield_moisture [numeric]
Mean (sd) : 61.8 (4)
min ≤ med ≤ max:
56.1 ≤ 60.9 ≤ 74.7
IQR (CV) : 3 (0.1)
 36 distinct values 0 (0.0%)
N_fertilizer [logical]
All NA's
 38 (100.0%)
P_fertilizer [logical]
All NA's
 38 (100.0%)
K_fertilizer [logical]
All NA's
 38 (100.0%)
irrigated [logical]
All NA's
 38 (100.0%)
plot_length [logical]
All NA's
 38 (100.0%)
plot_width [logical]
All NA's
 38 (100.0%)
harvest_index [numeric]
Mean (sd) : 0.6 (0.1)
min ≤ med ≤ max:
0.5 ≤ 0.6 ≤ 0.7
IQR (CV) : 0.1 (0.1)
 21 distinct values 0 (0.0%)
country [character] 1. Nigeria
38(100.0%)
 0 (0.0%)
location [character] 1. Warri
38(100.0%)
 0 (0.0%)
geo_from_source [logical] 1. TRUE
38(100.0%)
 0 (0.0%)