This report describes standardized data for “Assessment of Varieties of Cassava for high yield, disease resistance in a Uniform Yield Trial (18 clones) in Fumesua, Ghana 1997/98 Breeding Season”. These data were standardized on 2024-09-16 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 high yield, disease resistance in a Uniform Yield Trial (18 clones) in Fumesua, Ghana 1997/98 Breeding Season. International Institute of Tropical Agriculture (IITA). Not versioned. doi:10.25502/S95G-JG62

The dataset has 72 records and 28 variables for cassava in Ghana. 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 fwy_storage fwy_residue yield_part yield N_fertilizer P_fertilizer K_fertilizer irrigated plot_length plot_width harvest_index
Ghana Fumesua -1.52176 6.71093 TRUE 97uytICT18FU 1997 NA FALSE FALSE 1 cassava ABASA_FITAA NA 1237633 27700 NA roots 27700 NA NA NA NA NA NA 0.72
Ghana Fumesua -1.52176 6.71093 TRUE 97uytICT18FU 1997 NA FALSE FALSE 1 cassava AMAKUMA NA 1233647 4200 NA roots 4200 NA NA NA NA NA NA 0.40
Ghana Fumesua -1.52176 6.71093 TRUE 97uytICT18FU 1997 NA FALSE FALSE 1 cassava GBLEMO_DUADE NA 1237634 31200 NA roots 31200 NA NA NA NA NA NA 0.57
Ghana Fumesua -1.52176 6.71093 TRUE 97uytICT18FU 1997 NA FALSE FALSE 1 cassava IITA-TMS-IBA9000330 NA 1376 31600 NA roots 31600 NA NA NA NA NA NA 0.51
Ghana Fumesua -1.52176 6.71093 TRUE 97uytICT18FU 1997 NA FALSE FALSE 1 cassava IITA-TMS-IBA9001058 NA 308 18900 NA roots 18900 NA NA NA NA NA NA 0.75
Ghana Fumesua -1.52176 6.71093 TRUE 97uytICT18FU 1997 NA FALSE FALSE 1 cassava IITA-TMS-IBA9001554 NA 1379 28200 NA roots 28200 NA NA NA NA NA NA 0.58
Ghana Fumesua -1.52176 6.71093 TRUE 97uytICT18FU 1997 NA FALSE FALSE 1 cassava IITA-TMS-IBA9101363 NA 802539 20100 NA roots 20100 NA NA NA NA NA NA 0.76
Ghana Fumesua -1.52176 6.71093 TRUE 97uytICT18FU 1997 NA FALSE FALSE 1 cassava IITA-TMS-IBA9102316 NA 366 21600 NA roots 21600 NA NA NA NA NA NA 0.50
Ghana Fumesua -1.52176 6.71093 TRUE 97uytICT18FU 1997 NA FALSE FALSE 1 cassava IITA-TMS-IBA9102322 NA 372 39100 NA roots 39100 NA NA NA NA NA NA 0.65
Ghana Fumesua -1.52176 6.71093 TRUE 97uytICT18FU 1997 NA FALSE FALSE 1 cassava IITA-TMS-IBA9102324 NA 374 38900 NA roots 38900 NA NA NA NA NA NA 0.65
Ghana Fumesua -1.52176 6.71093 TRUE 97uytICT18FU 1997 NA FALSE FALSE 1 cassava IITA-TMS-IBA9102327 NA 378 28900 NA roots 28900 NA NA NA NA NA NA 0.62
Ghana Fumesua -1.52176 6.71093 TRUE 97uytICT18FU 1997 NA FALSE FALSE 1 cassava IITA-TMS-IBA920057 NA 390 37100 NA roots 37100 NA NA NA NA NA NA 0.59
Ghana Fumesua -1.52176 6.71093 TRUE 97uytICT18FU 1997 NA FALSE FALSE 1 cassava IITA-TMS-IBA920067 NA 392 28200 NA roots 28200 NA NA NA NA NA NA 0.44
Ghana Fumesua -1.52176 6.71093 TRUE 97uytICT18FU 1997 NA FALSE FALSE 1 cassava IITA-TMS-IBA920326 NA 396 24600 NA roots 24600 NA NA NA NA NA NA 0.63
Ghana Fumesua -1.52176 6.71093 TRUE 97uytICT18FU 1997 NA FALSE FALSE 1 cassava IITA-TMS-IBA920342 NA 398 31200 NA roots 31200 NA NA NA NA NA NA 0.48
Ghana Fumesua -1.52176 6.71093 TRUE 97uytICT18FU 1997 NA FALSE FALSE 1 cassava IITA-TMS-IBA920398 NA 402 30800 NA roots 30800 NA NA NA NA NA NA 0.59
Ghana Fumesua -1.52176 6.71093 TRUE 97uytICT18FU 1997 NA FALSE FALSE 1 cassava IITA-TMS-IBA920427 NA 404 29900 NA roots 29900 NA NA NA NA NA NA 0.64
Ghana Fumesua -1.52176 6.71093 TRUE 97uytICT18FU 1997 NA FALSE FALSE 1 cassava IITA-TMS-IBA920429 NA 409 22600 NA roots 22600 NA NA NA NA NA NA 0.37
Ghana Fumesua -1.52176 6.71093 TRUE 97uytICT18FU 1997 NA FALSE FALSE 2 cassava ABASA_FITAA NA 1237633 31500 NA roots 31500 NA NA NA NA NA NA 0.62
Ghana Fumesua -1.52176 6.71093 TRUE 97uytICT18FU 1997 NA FALSE FALSE 2 cassava AMAKUMA NA 1233647 12500 NA roots 12500 NA NA NA NA NA NA 0.38
Ghana Fumesua -1.52176 6.71093 TRUE 97uytICT18FU 1997 NA FALSE FALSE 2 cassava GBLEMO_DUADE NA 1237634 31200 NA roots 31200 NA NA NA NA NA NA 0.63
Ghana Fumesua -1.52176 6.71093 TRUE 97uytICT18FU 1997 NA FALSE FALSE 2 cassava IITA-TMS-IBA9000330 NA 1376 25200 NA roots 25200 NA NA NA NA NA NA 0.49
Ghana Fumesua -1.52176 6.71093 TRUE 97uytICT18FU 1997 NA FALSE FALSE 2 cassava IITA-TMS-IBA9001058 NA 308 30100 NA roots 30100 NA NA NA NA NA NA 0.62
Ghana Fumesua -1.52176 6.71093 TRUE 97uytICT18FU 1997 NA FALSE FALSE 2 cassava IITA-TMS-IBA9001554 NA 1379 27300 NA roots 27300 NA NA NA NA NA NA 0.52
Ghana Fumesua -1.52176 6.71093 TRUE 97uytICT18FU 1997 NA FALSE FALSE 2 cassava IITA-TMS-IBA9101363 NA 802539 30100 NA roots 30100 NA NA NA NA NA NA 0.70


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. Ghana
72(100.0%)
 0 (0.0%)
location [character] 1. Fumesua
72(100.0%)
 0 (0.0%)
geo_from_source [logical] 1. TRUE
72(100.0%)
 0 (0.0%)
trial_id [character] 1. 97uytICT18FU
72(100.0%)
 0 (0.0%)
planting_date [integer] 1 distinct value
1997:72(100.0%)
 0 (0.0%)
harvest_date [logical]
All NA's
 72 (100.0%)
on_farm [logical] 1. FALSE
72(100.0%)
 0 (0.0%)
is_survey [logical] 1. FALSE
72(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)
1:18(25.0%)
2:18(25.0%)
3:18(25.0%)
4:18(25.0%)
 0 (0.0%)
crop [character] 1. cassava
72(100.0%)
 0 (0.0%)
variety [character]
1. ABASA_FITAA
2. AMAKUMA
3. GBLEMO_DUADE
4. IITA-TMS-IBA9000330
5. IITA-TMS-IBA9001058
6. IITA-TMS-IBA9001554
7. IITA-TMS-IBA9101363
8. IITA-TMS-IBA9102316
9. IITA-TMS-IBA9102322
10. IITA-TMS-IBA9102324
[ 8 others ]
4(5.6%)
4(5.6%)
4(5.6%)
4(5.6%)
4(5.6%)
4(5.6%)
4(5.6%)
4(5.6%)
4(5.6%)
4(5.6%)
32(44.4%)
 0 (0.0%)
variety_alt [logical]
All NA's
 72 (100.0%)
variety_code [integer]
Mean (sd) : 251044.3 (480317.7)
min ≤ med ≤ max:
308 ≤ 400 ≤ 1237634
IQR (CV) : 1001 (1.9)
 18 distinct values 0 (0.0%)
fwy_storage [integer]
Mean (sd) : 27354.2 (7818.3)
min ≤ med ≤ max:
4200 ≤ 28200 ≤ 42400
IQR (CV) : 8750 (0.3)
 58 distinct values 0 (0.0%)
fwy_residue [logical]
All NA's
 72 (100.0%)
yield_part [character] 1. roots
72(100.0%)
 0 (0.0%)
yield [integer]
Mean (sd) : 27354.2 (7818.3)
min ≤ med ≤ max:
4200 ≤ 28200 ≤ 42400
IQR (CV) : 8750 (0.3)
 58 distinct values 0 (0.0%)
N_fertilizer [logical]
All NA's
 72 (100.0%)
P_fertilizer [logical]
All NA's
 72 (100.0%)
K_fertilizer [logical]
All NA's
 72 (100.0%)
irrigated [logical]
All NA's
 72 (100.0%)
plot_length [logical]
All NA's
 72 (100.0%)
plot_width [logical]
All NA's
 72 (100.0%)
harvest_index [numeric]
Mean (sd) : 0.6 (0.1)
min ≤ med ≤ max:
0.3 ≤ 0.6 ≤ 0.8
IQR (CV) : 0.2 (0.2)
 39 distinct values 0 (0.0%)