This report describes standardized data for “Assessment of Varieties of Cassava for high yield, disease resistance (cmd) in Demo Trial (28 clones) in Obior Delta State 2003/2004 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 (2003). Assessment of Varieties of Cassava for high yield, disease resistance (cmd) in Demo Trial (28 clones) in Obior Delta State 2003/2004 Breeding Season. International Institute of Tropical Agriculture (IITA). Not versioned. doi:10.25502/SWMB-V815

The dataset has 28 records and 27 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 yield_part yield N_fertilizer P_fertilizer K_fertilizer irrigated plot_length plot_width
Nigeria Delta Obior 5.71106 5.47146 TRUE 03cmd_demo_Delta_Obior 2002-06-25 2003-06-25 TRUE FALSE 1 cassava IITA-TMS-IBA961642 NA 9 13500 roots 13500 NA NA NA NA NA NA
Nigeria Delta Obior 5.71106 5.47146 TRUE 03cmd_demo_Delta_Obior 2002-06-25 2003-06-25 TRUE FALSE 1 cassava IITA-TMS-IBA980510 NA 1664 15000 roots 15000 NA NA NA NA NA NA
Nigeria Delta Obior 5.71106 5.47146 TRUE 03cmd_demo_Delta_Obior 2002-06-25 2003-06-25 TRUE FALSE 1 cassava IITA-TMS-IBA920067 NA 392 10500 roots 10500 NA NA NA NA NA NA
Nigeria Delta Obior 5.71106 5.47146 TRUE 03cmd_demo_Delta_Obior 2002-06-25 2003-06-25 TRUE FALSE 1 cassava IITA-TMS-IBA4(2)1425 NA 246 11750 roots 11750 NA NA NA NA NA NA
Nigeria Delta Obior 5.71106 5.47146 TRUE 03cmd_demo_Delta_Obior 2002-06-25 2003-06-25 TRUE FALSE 1 cassava IITA-TMS-IBA8200058 NA 268 9250 roots 9250 NA NA NA NA NA NA
Nigeria Delta Obior 5.71106 5.47146 TRUE 03cmd_demo_Delta_Obior 2002-06-25 2003-06-25 TRUE FALSE 1 cassava IITA-TMS-IBA940039 NA 497 8500 roots 8500 NA NA NA NA NA NA
Nigeria Delta Obior 5.71106 5.47146 TRUE 03cmd_demo_Delta_Obior 2002-06-25 2003-06-25 TRUE FALSE 1 cassava IITA-TMS-IBA980581 NA 723 11000 roots 11000 NA NA NA NA NA NA
Nigeria Delta Obior 5.71106 5.47146 TRUE 03cmd_demo_Delta_Obior 2002-06-25 2003-06-25 TRUE FALSE 1 cassava IITA-TMS-IBA974769 NA 709 7500 roots 7500 NA NA NA NA NA NA
Nigeria Delta Obior 5.71106 5.47146 TRUE 03cmd_demo_Delta_Obior 2002-06-25 2003-06-25 TRUE FALSE 1 cassava IITA-TMS-IBA940561 NA 1041 9750 roots 9750 NA NA NA NA NA NA
Nigeria Delta Obior 5.71106 5.47146 TRUE 03cmd_demo_Delta_Obior 2002-06-25 2003-06-25 TRUE FALSE 1 cassava IITA-TMS-IBA920326 NA 396 10250 roots 10250 NA NA NA NA NA NA
Nigeria Delta Obior 5.71106 5.47146 TRUE 03cmd_demo_Delta_Obior 2002-06-25 2003-06-25 TRUE FALSE 1 cassava IITA-TMS-IBA980505 NA 721 12000 roots 12000 NA NA NA NA NA NA
Nigeria Delta Obior 5.71106 5.47146 TRUE 03cmd_demo_Delta_Obior 2002-06-25 2003-06-25 TRUE FALSE 1 cassava IITA-TMS-IBA940026 NA 493 7500 roots 7500 NA NA NA NA NA NA
Nigeria Delta Obior 5.71106 5.47146 TRUE 03cmd_demo_Delta_Obior 2002-06-25 2003-06-25 TRUE FALSE 1 cassava IITA-TMS-IBA960603 NA 627 10000 roots 10000 NA NA NA NA NA NA
Nigeria Delta Obior 5.71106 5.47146 TRUE 03cmd_demo_Delta_Obior 2002-06-25 2003-06-25 TRUE FALSE 1 cassava IITA-TMS-IBA980002 NA 713 7500 roots 7500 NA NA NA NA NA NA
Nigeria Delta Obior 5.71106 5.47146 TRUE 03cmd_demo_Delta_Obior 2002-06-25 2003-06-25 TRUE FALSE 1 cassava IITA-TMS-IBA982101 NA 725 13000 roots 13000 NA NA NA NA NA NA
Nigeria Delta Obior 5.71106 5.47146 TRUE 03cmd_demo_Delta_Obior 2002-06-25 2003-06-25 TRUE FALSE 1 cassava IITA-TMS-IBA970211 NA 675 7000 roots 7000 NA NA NA NA NA NA
Nigeria Delta Obior 5.71106 5.47146 TRUE 03cmd_demo_Delta_Obior 2002-06-25 2003-06-25 TRUE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 5250 roots 5250 NA NA NA NA NA NA
Nigeria Delta Obior 5.71106 5.47146 TRUE 03cmd_demo_Delta_Obior 2002-06-25 2003-06-25 TRUE FALSE 1 cassava IITA-TMS-IBA973200 NA 1648 NA roots NA NA NA NA NA NA NA
Nigeria Delta Obior 5.71106 5.47146 TRUE 03cmd_demo_Delta_Obior 2002-06-25 2003-06-25 TRUE FALSE 1 cassava IITA-TMS-IBA960160 NA 592 NA roots NA NA NA NA NA NA NA
Nigeria Delta Obior 5.71106 5.47146 TRUE 03cmd_demo_Delta_Obior 2002-06-25 2003-06-25 TRUE FALSE 1 cassava IITA-TMS-IBA982226 NA 728 NA roots NA NA NA NA NA NA NA
Nigeria Delta Obior 5.71106 5.47146 TRUE 03cmd_demo_Delta_Obior 2002-06-25 2003-06-25 TRUE FALSE 1 cassava IITA-TMS-IBA974763 NA 1652 2130 roots 2130 NA NA NA NA NA NA
Nigeria Delta Obior 5.71106 5.47146 TRUE 03cmd_demo_Delta_Obior 2002-06-25 2003-06-25 TRUE FALSE 1 cassava IITA-TMS-IBA950289 NA 534 13250 roots 13250 NA NA NA NA NA NA
Nigeria Delta Obior 5.71106 5.47146 TRUE 03cmd_demo_Delta_Obior 2002-06-25 2003-06-25 TRUE FALSE 1 cassava IITA-TMS-IBA9102324 NA 374 8500 roots 8500 NA NA NA NA NA NA
Nigeria Delta Obior 5.71106 5.47146 TRUE 03cmd_demo_Delta_Obior 2002-06-25 2003-06-25 TRUE FALSE 1 cassava IITA-TMS-IBA950379 NA 540 11500 roots 11500 NA NA NA NA NA NA
Nigeria Delta Obior 5.71106 5.47146 TRUE 03cmd_demo_Delta_Obior 2002-06-25 2003-06-25 TRUE FALSE 1 cassava TMEB419 NA 39671 10500 roots 10500 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 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
28(100.0%)
 0 (0.0%)
adm1 [character] 1. Delta
28(100.0%)
 0 (0.0%)
location [character] 1. Obior
28(100.0%)
 0 (0.0%)
geo_from_source [logical] 1. TRUE
28(100.0%)
 0 (0.0%)
trial_id [character] 1. 03cmd_demo_Delta_Obi
28(100.0%)
 0 (0.0%)
planting_date [character] 1. 2002-06-25
28(100.0%)
 0 (0.0%)
harvest_date [character] 1. 2003-06-25
28(100.0%)
 0 (0.0%)
on_farm [logical] 1. TRUE
28(100.0%)
 0 (0.0%)
is_survey [logical] 1. FALSE
28(100.0%)
 0 (0.0%)
rep [integer] 1 distinct value
1:28(100.0%)
 0 (0.0%)
crop [character] 1. cassava
28(100.0%)
 0 (0.0%)
variety [character]
1. IITA-TMS-IBA30572
2. IITA-TMS-IBA4(2)1425
3. IITA-TMS-IBA8200058
4. IITA-TMS-IBA9102324
5. IITA-TMS-IBA920067
6. IITA-TMS-IBA920068
7. IITA-TMS-IBA920326
8. IITA-TMS-IBA940026
9. IITA-TMS-IBA940039
10. IITA-TMS-IBA940561
[ 18 others ]
1(3.6%)
1(3.6%)
1(3.6%)
1(3.6%)
1(3.6%)
1(3.6%)
1(3.6%)
1(3.6%)
1(3.6%)
1(3.6%)
18(64.3%)
 0 (0.0%)
variety_alt [logical]
All NA's
 28 (100.0%)
variety_code [integer]
Mean (sd) : 44128.9 (222448.8)
min ≤ med ≤ max:
5 ≤ 687.5 ≤ 1178554
IQR (CV) : 257 (5)
 28 distinct values 0 (0.0%)
fwy_storage [integer]
Mean (sd) : 9705.2 (2824.8)
min ≤ med ≤ max:
2130 ≤ 10000 ≤ 15000
IQR (CV) : 3500 (0.3)
 21 distinct values 3 (10.7%)
yield_part [character] 1. roots
28(100.0%)
 0 (0.0%)
yield [integer]
Mean (sd) : 9705.2 (2824.8)
min ≤ med ≤ max:
2130 ≤ 10000 ≤ 15000
IQR (CV) : 3500 (0.3)
 21 distinct values 3 (10.7%)
N_fertilizer [logical]
All NA's
 28 (100.0%)
P_fertilizer [logical]
All NA's
 28 (100.0%)
K_fertilizer [logical]
All NA's
 28 (100.0%)
irrigated [logical]
All NA's
 28 (100.0%)
plot_length [logical]
All NA's
 28 (100.0%)
plot_width [logical]
All NA's
 28 (100.0%)