This report describes standardized data for “Assessment of Varieties of Cassava for high yield and disease resistance using Uniform Yield Trial (14 clones) in Mokwa 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 (14 clones) in Mokwa 1999/2000 Breeding Season. International Institute of Tropical Agriculture (IITA). Not versioned. doi:10.25502/W8JQ-2765

The dataset has 42 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 99uyt14highyldMK 1999-06-27 2000-06-30 FALSE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 6.10 17000 NA roots 17000 NA NA NA NA NA NA 0.48
Nigeria Mokwa 5.31025 9.23942 TRUE 99uyt14highyldMK 1999-06-27 2000-06-30 FALSE FALSE 1 cassava IITA-TMS-IBA4(2)1425 NA 246 4.64 13300 NA roots 13300 NA NA NA NA NA NA 0.58
Nigeria Mokwa 5.31025 9.23942 TRUE 99uyt14highyldMK 1999-06-27 2000-06-30 FALSE FALSE 1 cassava IITA-TMS-IBA9102324 NA 374 5.48 21000 NA roots 21000 NA NA NA NA NA NA 0.65
Nigeria Mokwa 5.31025 9.23942 TRUE 99uyt14highyldMK 1999-06-27 2000-06-30 FALSE FALSE 1 cassava IITA-TMS-IBA970103 NA 671 5.02 14500 NA roots 14500 NA NA NA NA NA NA 0.40
Nigeria Mokwa 5.31025 9.23942 TRUE 99uyt14highyldMK 1999-06-27 2000-06-30 FALSE FALSE 1 cassava IITA-TMS-IBA970162 NA 673 5.64 14700 NA roots 14700 NA NA NA NA NA NA 0.49
Nigeria Mokwa 5.31025 9.23942 TRUE 99uyt14highyldMK 1999-06-27 2000-06-30 FALSE FALSE 1 cassava IITA-TMS-IBA970211 NA 675 3.46 12000 NA roots 12000 NA NA NA NA NA NA 0.49
Nigeria Mokwa 5.31025 9.23942 TRUE 99uyt14highyldMK 1999-06-27 2000-06-30 FALSE FALSE 1 cassava IITA-TMS-IBA970255 NA 677 3.61 20500 NA roots 20500 NA NA NA NA NA NA 0.53
Nigeria Mokwa 5.31025 9.23942 TRUE 99uyt14highyldMK 1999-06-27 2000-06-30 FALSE FALSE 1 cassava IITA-TMS-IBA970270 NA 679 6.95 18000 NA roots 18000 NA NA NA NA NA NA 0.49
Nigeria Mokwa 5.31025 9.23942 TRUE 99uyt14highyldMK 1999-06-27 2000-06-30 FALSE FALSE 1 cassava IITA-TMS-IBA970286 NA 681 1.76 6750 NA roots 6750 NA NA NA NA NA NA 0.44
Nigeria Mokwa 5.31025 9.23942 TRUE 99uyt14highyldMK 1999-06-27 2000-06-30 FALSE FALSE 1 cassava IITA-TMS-IBA970296 NA 683 4.06 14000 NA roots 14000 NA NA NA NA NA NA 0.46
Nigeria Mokwa 5.31025 9.23942 TRUE 99uyt14highyldMK 1999-06-27 2000-06-30 FALSE FALSE 1 cassava IITA-TMS-IBA970299 NA 686 3.54 11250 NA roots 11250 NA NA NA NA NA NA 0.37
Nigeria Mokwa 5.31025 9.23942 TRUE 99uyt14highyldMK 1999-06-27 2000-06-30 FALSE FALSE 1 cassava IITA-TMS-IBA970335 NA 688 4.43 19000 NA roots 19000 NA NA NA NA NA NA 0.54
Nigeria Mokwa 5.31025 9.23942 TRUE 99uyt14highyldMK 1999-06-27 2000-06-30 FALSE FALSE 1 cassava IITA-TMS-IBA970358 NA 690 9.31 24000 NA roots 24000 NA NA NA NA NA NA 0.60
Nigeria Mokwa 5.31025 9.23942 TRUE 99uyt14highyldMK 1999-06-27 2000-06-30 FALSE FALSE 1 cassava IITA-TMS-IBA970425 NA 692 1.56 8250 NA roots 8250 NA NA NA NA NA NA 0.60
Nigeria Mokwa 5.31025 9.23942 TRUE 99uyt14highyldMK 1999-06-27 2000-06-30 FALSE FALSE 2 cassava IITA-TMS-IBA30572 NA 5 4.36 15400 NA roots 15400 NA NA NA NA NA NA 0.41
Nigeria Mokwa 5.31025 9.23942 TRUE 99uyt14highyldMK 1999-06-27 2000-06-30 FALSE FALSE 2 cassava IITA-TMS-IBA4(2)1425 NA 246 3.66 10000 NA roots 10000 NA NA NA NA NA NA 0.56
Nigeria Mokwa 5.31025 9.23942 TRUE 99uyt14highyldMK 1999-06-27 2000-06-30 FALSE FALSE 2 cassava IITA-TMS-IBA9102324 NA 374 5.93 19500 NA roots 19500 NA NA NA NA NA NA 0.58
Nigeria Mokwa 5.31025 9.23942 TRUE 99uyt14highyldMK 1999-06-27 2000-06-30 FALSE FALSE 2 cassava IITA-TMS-IBA970103 NA 671 4.52 13400 NA roots 13400 NA NA NA NA NA NA 0.42
Nigeria Mokwa 5.31025 9.23942 TRUE 99uyt14highyldMK 1999-06-27 2000-06-30 FALSE FALSE 2 cassava IITA-TMS-IBA970162 NA 673 7.14 20000 NA roots 20000 NA NA NA NA NA NA 0.48
Nigeria Mokwa 5.31025 9.23942 TRUE 99uyt14highyldMK 1999-06-27 2000-06-30 FALSE FALSE 2 cassava IITA-TMS-IBA970211 NA 675 5.94 16500 NA roots 16500 NA NA NA NA NA NA 0.57
Nigeria Mokwa 5.31025 9.23942 TRUE 99uyt14highyldMK 1999-06-27 2000-06-30 FALSE FALSE 2 cassava IITA-TMS-IBA970255 NA 677 5.30 17500 NA roots 17500 NA NA NA NA NA NA 0.53
Nigeria Mokwa 5.31025 9.23942 TRUE 99uyt14highyldMK 1999-06-27 2000-06-30 FALSE FALSE 2 cassava IITA-TMS-IBA970270 NA 679 3.30 8000 NA roots 8000 NA NA NA NA NA NA 0.36
Nigeria Mokwa 5.31025 9.23942 TRUE 99uyt14highyldMK 1999-06-27 2000-06-30 FALSE FALSE 2 cassava IITA-TMS-IBA970286 NA 681 4.69 13000 NA roots 13000 NA NA NA NA NA NA 0.36
Nigeria Mokwa 5.31025 9.23942 TRUE 99uyt14highyldMK 1999-06-27 2000-06-30 FALSE FALSE 2 cassava IITA-TMS-IBA970296 NA 683 3.53 12500 NA roots 12500 NA NA NA NA NA NA 0.37
Nigeria Mokwa 5.31025 9.23942 TRUE 99uyt14highyldMK 1999-06-27 2000-06-30 FALSE FALSE 2 cassava IITA-TMS-IBA970299 NA 686 1.58 6200 NA roots 6200 NA NA NA NA NA NA 0.44


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


The standardization script emits the following non-compliance warnings.

message
42 harvest_date more than 366 days after planting_date

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
42(100.0%)
 0 (0.0%)
location [character] 1. Mokwa
42(100.0%)
 0 (0.0%)
geo_from_source [logical] 1. TRUE
42(100.0%)
 0 (0.0%)
trial_id [character] 1. 99uyt14highyldMK
42(100.0%)
 0 (0.0%)
planting_date [character] 1. 1999-06-27
42(100.0%)
 0 (0.0%)
harvest_date [character] 1. 2000-06-30
42(100.0%)
 0 (0.0%)
on_farm [logical] 1. FALSE
42(100.0%)
 0 (0.0%)
is_survey [logical] 1. FALSE
42(100.0%)
 0 (0.0%)
rep [integer]
Mean (sd) : 2 (0.8)
min ≤ med ≤ max:
1 ≤ 2 ≤ 3
IQR (CV) : 2 (0.4)
1:14(33.3%)
2:14(33.3%)
3:14(33.3%)
 0 (0.0%)
crop [character] 1. cassava
42(100.0%)
 0 (0.0%)
variety [character]
1. IITA-TMS-IBA30572
2. IITA-TMS-IBA4(2)1425
3. IITA-TMS-IBA9102324
4. IITA-TMS-IBA970103
5. IITA-TMS-IBA970162
6. IITA-TMS-IBA970211
7. IITA-TMS-IBA970255
8. IITA-TMS-IBA970270
9. IITA-TMS-IBA970286
10. IITA-TMS-IBA970296
[ 4 others ]
3(7.1%)
3(7.1%)
3(7.1%)
3(7.1%)
3(7.1%)
3(7.1%)
3(7.1%)
3(7.1%)
3(7.1%)
3(7.1%)
12(28.6%)
 0 (0.0%)
variety_alt [logical]
All NA's
 42 (100.0%)
variety_code [integer]
Mean (sd) : 580 (209.2)
min ≤ med ≤ max:
5 ≤ 678 ≤ 692
IQR (CV) : 15 (0.4)
 14 distinct values 0 (0.0%)
dmy_storage [numeric]
Mean (sd) : 4.7 (1.8)
min ≤ med ≤ max:
1.6 ≤ 4.5 ≤ 9.3
IQR (CV) : 2.1 (0.4)
 27 distinct values 14 (33.3%)
fwy_storage [integer]
Mean (sd) : 14678.6 (5232.8)
min ≤ med ≤ max:
6000 ≤ 13750 ≤ 25500
IQR (CV) : 7000 (0.4)
 37 distinct values 0 (0.0%)
fwy_residue [logical]
All NA's
 42 (100.0%)
yield_part [character] 1. roots
42(100.0%)
 0 (0.0%)
yield [integer]
Mean (sd) : 14678.6 (5232.8)
min ≤ med ≤ max:
6000 ≤ 13750 ≤ 25500
IQR (CV) : 7000 (0.4)
 37 distinct values 0 (0.0%)
N_fertilizer [logical]
All NA's
 42 (100.0%)
P_fertilizer [logical]
All NA's
 42 (100.0%)
K_fertilizer [logical]
All NA's
 42 (100.0%)
irrigated [logical]
All NA's
 42 (100.0%)
plot_length [logical]
All NA's
 42 (100.0%)
plot_width [logical]
All NA's
 42 (100.0%)
harvest_index [numeric]
Mean (sd) : 0.5 (0.1)
min ≤ med ≤ max:
0.4 ≤ 0.5 ≤ 0.7
IQR (CV) : 0.1 (0.2)
 18 distinct values 14 (33.3%)