This report describes standardized data for “Assessment of Varieties of Cassava for high yield, using On farm Trial in Bori Village, Rivers state, Nigeria 2003/2004 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, using On farm Trial in Bori Village, Rivers state, Nigeria 2003/2004 Breeding Season. International Institute of Tropical Agriculture (IITA). Not versioned. doi:10.25502/KK0A-VT42

The dataset has 44 records and 28 variables for cassava in Nigeria. The dataset has 1 treatment(s): variety.


These are the first 25 records:

records
country adm1 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
Nigeria Rivers Bori 6.8134 5.10201 TRUE 03CMD_OFT_Hav_Rivers_Bori 2003 NA TRUE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 21800 NA roots 21800 NA NA NA NA NA NA
Nigeria Rivers Bori 6.8134 5.10201 TRUE 03CMD_OFT_Hav_Rivers_Bori 2003 NA TRUE FALSE 1 cassava IITA-TMS-IBA974769 NA 709 11200 NA roots 11200 NA NA NA NA NA NA
Nigeria Rivers Bori 6.8134 5.10201 TRUE 03CMD_OFT_Hav_Rivers_Bori 2003 NA TRUE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 14400 NA roots 14400 NA NA NA NA NA NA
Nigeria Rivers Bori 6.8134 5.10201 TRUE 03CMD_OFT_Hav_Rivers_Bori 2003 NA TRUE FALSE 1 cassava Local NA 797517 NA NA roots NA NA NA NA NA NA NA
Nigeria Rivers Bori 6.8134 5.10201 TRUE 03CMD_OFT_Hav_Rivers_Bori 2003 NA TRUE FALSE 1 cassava IITA-TMS-IBA961642 NA 9 21800 NA roots 21800 NA NA NA NA NA NA
Nigeria Rivers Bori 6.8134 5.10201 TRUE 03CMD_OFT_Hav_Rivers_Bori 2003 NA TRUE FALSE 1 cassava IITA-TMS-IBA982101 NA 725 18800 NA roots 18800 NA NA NA NA NA NA
Nigeria Rivers Bori 6.8134 5.10201 TRUE 03CMD_OFT_Hav_Rivers_Bori 2003 NA TRUE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 8400 NA roots 8400 NA NA NA NA NA NA
Nigeria Rivers Bori 6.8134 5.10201 TRUE 03CMD_OFT_Hav_Rivers_Bori 2003 NA TRUE FALSE 1 cassava IITA-TMS-IBA940561 NA 1041 8000 NA roots 8000 NA NA NA NA NA NA
Nigeria Rivers Bori 6.8134 5.10201 TRUE 03CMD_OFT_Hav_Rivers_Bori 2003 NA TRUE FALSE 1 cassava IITA-TMS-IBA973200 NA 1648 20400 NA roots 20400 NA NA NA NA NA NA
Nigeria Rivers Bori 6.8134 5.10201 TRUE 03CMD_OFT_Hav_Rivers_Bori 2003 NA TRUE FALSE 1 cassava IITA-TMS-IBA920057 NA 390 22800 NA roots 22800 NA NA NA NA NA NA
Nigeria Rivers Bori 6.8134 5.10201 TRUE 03CMD_OFT_Hav_Rivers_Bori 2003 NA TRUE FALSE 1 cassava TMEB419 NA 39671 13800 NA roots 13800 NA NA NA NA NA NA
Nigeria Rivers Bori 6.8134 5.10201 TRUE 03CMD_OFT_Hav_Rivers_Bori 2003 NA TRUE FALSE 1 cassava IITA-TMS-IBA970211 NA 675 6200 NA roots 6200 NA NA NA NA NA NA
Nigeria Rivers Bori 6.8134 5.10201 TRUE 03CMD_OFT_Hav_Rivers_Bori 2003 NA TRUE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 9200 NA roots 9200 NA NA NA NA NA NA
Nigeria Rivers Bori 6.8134 5.10201 TRUE 03CMD_OFT_Hav_Rivers_Bori 2003 NA TRUE FALSE 1 cassava IITA-TMS-IBA996012 NA 1720 14400 NA roots 14400 NA NA NA NA NA NA
Nigeria Rivers Bori 6.8134 5.10201 TRUE 03CMD_OFT_Hav_Rivers_Bori 2003 NA TRUE FALSE 1 cassava Local NA 797517 7400 NA roots 7400 NA NA NA NA NA NA
Nigeria Rivers Bori 6.8134 5.10201 TRUE 03CMD_OFT_Hav_Rivers_Bori 2003 NA TRUE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 5400 NA roots 5400 NA NA NA NA NA NA
Nigeria Rivers Bori 6.8134 5.10201 TRUE 03CMD_OFT_Hav_Rivers_Bori 2003 NA TRUE FALSE 1 cassava IITA-TMS-IBA982226 NA 728 7800 NA roots 7800 NA NA NA NA NA NA
Nigeria Rivers Bori 6.8134 5.10201 TRUE 03CMD_OFT_Hav_Rivers_Bori 2003 NA TRUE FALSE 1 cassava IITA-TMS-IBA980002 NA 713 11400 NA roots 11400 NA NA NA NA NA NA
Nigeria Rivers Bori 6.8134 5.10201 TRUE 03CMD_OFT_Hav_Rivers_Bori 2003 NA TRUE FALSE 1 cassava IITA-TMS-IBA972205 NA 700 9200 NA roots 9200 NA NA NA NA NA NA
Nigeria Rivers Bori 6.8134 5.10201 TRUE 03CMD_OFT_Hav_Rivers_Bori 2003 NA TRUE FALSE 1 cassava IITA-TMS-IBA950289 NA 534 8000 NA roots 8000 NA NA NA NA NA NA
Nigeria Rivers Bori 6.8134 5.10201 TRUE 03CMD_OFT_Hav_Rivers_Bori 2003 NA TRUE FALSE 1 cassava IITA-TMS-IBA961632 NA 665 4000 NA roots 4000 NA NA NA NA NA NA
Nigeria Rivers Bori 6.8134 5.10201 TRUE 03CMD_OFT_Hav_Rivers_Bori 2003 NA TRUE FALSE 1 cassava Local NA 797517 7200 NA roots 7200 NA NA NA NA NA NA
Nigeria Rivers Bori 6.8134 5.10201 TRUE 03CMD_OFT_Hav_Rivers_Bori 2003 NA TRUE FALSE 1 cassava IITA-TMS-IBA950166 NA 526 NA NA roots NA NA NA NA NA NA NA
Nigeria Rivers Bori 6.8134 5.10201 TRUE 03CMD_OFT_Hav_Rivers_Bori 2003 NA TRUE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 4800 NA roots 4800 NA NA NA NA NA NA
Nigeria Rivers Bori 6.8134 5.10201 TRUE 03CMD_OFT_Hav_Rivers_Bori 2003 NA TRUE FALSE 1 cassava IITA-TMS-IBA9102324 NA 374 47200 NA roots 47200 NA NA NA NA NA NA


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


The standardization script emits the following non-compliance warnings.

message
yield

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
44(100.0%)
 0 (0.0%)
adm1 [character] 1. Rivers
44(100.0%)
 0 (0.0%)
location [character] 1. Bori
44(100.0%)
 0 (0.0%)
geo_from_source [logical] 1. TRUE
44(100.0%)
 0 (0.0%)
trial_id [character] 1. 03CMD_OFT_Hav_Rivers
44(100.0%)
 0 (0.0%)
planting_date [integer] 1 distinct value
2003:44(100.0%)
 0 (0.0%)
harvest_date [logical]
All NA's
 44 (100.0%)
on_farm [logical] 1. TRUE
44(100.0%)
 0 (0.0%)
is_survey [logical] 1. FALSE
44(100.0%)
 0 (0.0%)
rep [integer] 1 distinct value
1:44(100.0%)
 0 (0.0%)
crop [character] 1. cassava
44(100.0%)
 0 (0.0%)
variety [character]
1. IITA-TMS-IBA30572
2. Local
3. IITA-TMS-IBA9102324
4. IITA-TMS-BAD9200061
5. IITA-TMS-BAD9200068
6. IITA-TMS-IBA920057
7. IITA-TMS-IBA920067
8. IITA-TMS-IBA940026
9. IITA-TMS-IBA940039
10. IITA-TMS-IBA940561
[ 21 others ]
9(20.5%)
5(11.4%)
2(4.5%)
1(2.3%)
1(2.3%)
1(2.3%)
1(2.3%)
1(2.3%)
1(2.3%)
1(2.3%)
21(47.7%)
 0 (0.0%)
variety_alt [logical]
All NA's
 44 (100.0%)
variety_code [integer]
Mean (sd) : 92010.9 (255600.4)
min ≤ med ≤ max:
5 ≤ 646 ≤ 797517
IQR (CV) : 432.2 (2.8)
 31 distinct values 0 (0.0%)
fwy_storage [integer]
Mean (sd) : 14441.2 (9984.7)
min ≤ med ≤ max:
2400 ≤ 11300 ≤ 47200
IQR (CV) : 12000 (0.7)
 27 distinct values 10 (22.7%)
fwy_residue [logical]
All NA's
 44 (100.0%)
yield_part [character] 1. roots
44(100.0%)
 0 (0.0%)
yield [integer]
Mean (sd) : 14441.2 (9984.7)
min ≤ med ≤ max:
2400 ≤ 11300 ≤ 47200
IQR (CV) : 12000 (0.7)
 27 distinct values 10 (22.7%)
N_fertilizer [logical]
All NA's
 44 (100.0%)
P_fertilizer [logical]
All NA's
 44 (100.0%)
K_fertilizer [logical]
All NA's
 44 (100.0%)
irrigated [logical]
All NA's
 44 (100.0%)
plot_length [logical]
All NA's
 44 (100.0%)
plot_width [logical]
All NA's
 44 (100.0%)