This report describes standardized data for “Assessment of Varieties of Cassava for low cyanide using Uniform Yield Trial (20 clones) in Mokwa 2000/2001 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 (2001). Assessment of Varieties of Cassava for low cyanide using Uniform Yield Trial (20 clones) in Mokwa 2000/2001 Breeding Season. International Institute of Tropical Agriculture (IITA). Not versioned. doi:10.25502/HR7G-YV25

The dataset has 80 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 Mokwa 5.31025 9.23942 TRUE 00uyt20lcnMK 2000-06-30 2001-06-26 FALSE FALSE 1 cassava IITA-TMS-BAD9100462 NA 39770 4.28 12000 NA roots 12000 NA NA NA NA NA NA 0.34
Nigeria Mokwa 5.31025 9.23942 TRUE 00uyt20lcnMK 2000-06-30 2001-06-26 FALSE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 2.78 10200 NA roots 10200 NA NA NA NA NA NA 0.65
Nigeria Mokwa 5.31025 9.23942 TRUE 00uyt20lcnMK 2000-06-30 2001-06-26 FALSE FALSE 1 cassava IITA-TMS-IBA4(2)1425 NA 246 1.37 4500 NA roots 4500 NA NA NA NA NA NA 0.38
Nigeria Mokwa 5.31025 9.23942 TRUE 00uyt20lcnMK 2000-06-30 2001-06-26 FALSE FALSE 1 cassava IITA-TMS-IBA71762 NA 95781 2.52 6500 NA roots 6500 NA NA NA NA NA NA 0.43
Nigeria Mokwa 5.31025 9.23942 TRUE 00uyt20lcnMK 2000-06-30 2001-06-26 FALSE FALSE 1 cassava IITA-TMS-IBA8200058 NA 268 3.64 13100 NA roots 13100 NA NA NA NA NA NA 0.47
Nigeria Mokwa 5.31025 9.23942 TRUE 00uyt20lcnMK 2000-06-30 2001-06-26 FALSE FALSE 1 cassava IITA-TMS-IBA9100416 NA 338 3.64 10000 NA roots 10000 NA NA NA NA NA NA 0.35
Nigeria Mokwa 5.31025 9.23942 TRUE 00uyt20lcnMK 2000-06-30 2001-06-26 FALSE FALSE 1 cassava IITA-TMS-IBA9102312 NA 362 3.02 7500 NA roots 7500 NA NA NA NA NA NA 0.36
Nigeria Mokwa 5.31025 9.23942 TRUE 00uyt20lcnMK 2000-06-30 2001-06-26 FALSE FALSE 1 cassava IITA-TMS-IBA9102324 NA 374 7.36 22500 NA roots 22500 NA NA NA NA NA NA 0.49
Nigeria Mokwa 5.31025 9.23942 TRUE 00uyt20lcnMK 2000-06-30 2001-06-26 FALSE FALSE 1 cassava IITA-TMS-IBA920057 NA 390 4.75 12500 NA roots 12500 NA NA NA NA NA NA 0.44
Nigeria Mokwa 5.31025 9.23942 TRUE 00uyt20lcnMK 2000-06-30 2001-06-26 FALSE FALSE 1 cassava IITA-TMS-IBA920326 NA 396 3.66 14200 NA roots 14200 NA NA NA NA NA NA 0.46
Nigeria Mokwa 5.31025 9.23942 TRUE 00uyt20lcnMK 2000-06-30 2001-06-26 FALSE FALSE 1 cassava IITA-TMS-IBA920342 NA 398 4.78 16000 NA roots 16000 NA NA NA NA NA NA 0.47
Nigeria Mokwa 5.31025 9.23942 TRUE 00uyt20lcnMK 2000-06-30 2001-06-26 FALSE FALSE 1 cassava IITA-TMS-IBA920397 NA 400 4.67 15150 NA roots 15150 NA NA NA NA NA NA 0.34
Nigeria Mokwa 5.31025 9.23942 TRUE 00uyt20lcnMK 2000-06-30 2001-06-26 FALSE FALSE 1 cassava IITA-TMS-IBA920398 NA 402 5.93 18300 NA roots 18300 NA NA NA NA NA NA 0.51
Nigeria Mokwa 5.31025 9.23942 TRUE 00uyt20lcnMK 2000-06-30 2001-06-26 FALSE FALSE 1 cassava IITA-TMS-IBA920429 NA 409 2.54 8000 NA roots 8000 NA NA NA NA NA NA 0.25
Nigeria Mokwa 5.31025 9.23942 TRUE 00uyt20lcnMK 2000-06-30 2001-06-26 FALSE FALSE 1 cassava IITA-TMS-IBA920430 NA 411 3.10 10000 NA roots 10000 NA NA NA NA NA NA 0.36
Nigeria Mokwa 5.31025 9.23942 TRUE 00uyt20lcnMK 2000-06-30 2001-06-26 FALSE FALSE 1 cassava IITA-TMS-IBA940018 NA 489 5.20 13000 NA roots 13000 NA NA NA NA NA NA 0.44
Nigeria Mokwa 5.31025 9.23942 TRUE 00uyt20lcnMK 2000-06-30 2001-06-26 FALSE FALSE 1 cassava IITA-TMS-IBA940020 NA 491 5.44 17600 NA roots 17600 NA NA NA NA NA NA 0.49
Nigeria Mokwa 5.31025 9.23942 TRUE 00uyt20lcnMK 2000-06-30 2001-06-26 FALSE FALSE 1 cassava IITA-TMS-IBA940026 NA 493 5.74 18000 NA roots 18000 NA NA NA NA NA NA 0.53
Nigeria Mokwa 5.31025 9.23942 TRUE 00uyt20lcnMK 2000-06-30 2001-06-26 FALSE FALSE 1 cassava IITA-TMS-IBA940237 NA 7 4.93 15350 NA roots 15350 NA NA NA NA NA NA 0.33
Nigeria Mokwa 5.31025 9.23942 TRUE 00uyt20lcnMK 2000-06-30 2001-06-26 FALSE FALSE 1 cassava TMEB1 NA 39629 4.41 13600 NA roots 13600 NA NA NA NA NA NA 0.39
Nigeria Mokwa 5.31025 9.23942 TRUE 00uyt20lcnMK 2000-06-30 2001-06-26 FALSE FALSE 2 cassava IITA-TMS-BAD9100462 NA 39770 2.18 6000 NA roots 6000 NA NA NA NA NA NA 0.34
Nigeria Mokwa 5.31025 9.23942 TRUE 00uyt20lcnMK 2000-06-30 2001-06-26 FALSE FALSE 2 cassava IITA-TMS-IBA30572 NA 5 6.10 16000 NA roots 16000 NA NA NA NA NA NA 0.49
Nigeria Mokwa 5.31025 9.23942 TRUE 00uyt20lcnMK 2000-06-30 2001-06-26 FALSE FALSE 2 cassava IITA-TMS-IBA4(2)1425 NA 246 4.26 12800 NA roots 12800 NA NA NA NA NA NA 0.43
Nigeria Mokwa 5.31025 9.23942 TRUE 00uyt20lcnMK 2000-06-30 2001-06-26 FALSE FALSE 2 cassava IITA-TMS-IBA71762 NA 95781 2.76 7500 NA roots 7500 NA NA NA NA NA NA 0.54
Nigeria Mokwa 5.31025 9.23942 TRUE 00uyt20lcnMK 2000-06-30 2001-06-26 FALSE FALSE 2 cassava IITA-TMS-IBA8200058 NA 268 4.17 15000 NA roots 15000 NA NA NA NA NA NA 0.40


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 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
80(100.0%)
 0 (0.0%)
location [character] 1. Mokwa
80(100.0%)
 0 (0.0%)
geo_from_source [logical] 1. TRUE
80(100.0%)
 0 (0.0%)
trial_id [character] 1. 00uyt20lcnMK
80(100.0%)
 0 (0.0%)
planting_date [character] 1. 2000-06-30
80(100.0%)
 0 (0.0%)
harvest_date [character] 1. 2001-06-26
80(100.0%)
 0 (0.0%)
on_farm [logical] 1. FALSE
80(100.0%)
 0 (0.0%)
is_survey [logical] 1. FALSE
80(100.0%)
 0 (0.0%)
rep [integer]
Mean (sd) : 2.5 (1.1)
min ≤ med ≤ max:
1 ≤ 2.5 ≤ 4
IQR (CV) : 1.5 (0.5)
1:20(25.0%)
2:20(25.0%)
3:20(25.0%)
4:20(25.0%)
 0 (0.0%)
crop [character] 1. cassava
80(100.0%)
 0 (0.0%)
variety [character]
1. IITA-TMS-BAD9100462
2. IITA-TMS-IBA30572
3. IITA-TMS-IBA4(2)1425
4. IITA-TMS-IBA71762
5. IITA-TMS-IBA8200058
6. IITA-TMS-IBA9100416
7. IITA-TMS-IBA9102312
8. IITA-TMS-IBA9102324
9. IITA-TMS-IBA920057
10. IITA-TMS-IBA920326
[ 10 others ]
4(5.0%)
4(5.0%)
4(5.0%)
4(5.0%)
4(5.0%)
4(5.0%)
4(5.0%)
4(5.0%)
4(5.0%)
4(5.0%)
40(50.0%)
 0 (0.0%)
variety_alt [logical]
All NA's
 80 (100.0%)
variety_code [integer]
Mean (sd) : 9053 (23264.4)
min ≤ med ≤ max:
5 ≤ 399 ≤ 95781
IQR (CV) : 133.5 (2.6)
 20 distinct values 0 (0.0%)
dmy_storage [numeric]
Mean (sd) : 4.3 (1.7)
min ≤ med ≤ max:
1.1 ≤ 4.2 ≤ 8.3
IQR (CV) : 2.2 (0.4)
 39 distinct values 40 (50.0%)
fwy_storage [integer]
Mean (sd) : 13861.9 (4957.6)
min ≤ med ≤ max:
4500 ≤ 13350 ≤ 24800
IQR (CV) : 7000 (0.4)
 53 distinct values 0 (0.0%)
fwy_residue [logical]
All NA's
 80 (100.0%)
yield_part [character] 1. roots
80(100.0%)
 0 (0.0%)
yield [integer]
Mean (sd) : 13861.9 (4957.6)
min ≤ med ≤ max:
4500 ≤ 13350 ≤ 24800
IQR (CV) : 7000 (0.4)
 53 distinct values 0 (0.0%)
N_fertilizer [logical]
All NA's
 80 (100.0%)
P_fertilizer [logical]
All NA's
 80 (100.0%)
K_fertilizer [logical]
All NA's
 80 (100.0%)
irrigated [logical]
All NA's
 80 (100.0%)
plot_length [logical]
All NA's
 80 (100.0%)
plot_width [logical]
All NA's
 80 (100.0%)
harvest_index [numeric]
Mean (sd) : 0.4 (0.1)
min ≤ med ≤ max:
0.2 ≤ 0.4 ≤ 0.7
IQR (CV) : 0.1 (0.2)
 31 distinct values 0 (0.0%)