This report describes standardized data for “Advanced yield trial from Ubiaja using 58 clones selected from 2014 Ubiaja Expanded CET GS Cycle 0 and Cycle 1”. 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 (2016). Advanced yield trial from Ubiaja using 58 clones selected from 2014 Ubiaja Expanded CET GS Cycle 0 and Cycle 1. International Institute of Tropical Agriculture (IITA) . Not versioned. doi:10.25502/GM4V-YE29

The dataset has 174 records and 28 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 fwy_storage fwy_residue yield_part yield N_fertilizer P_fertilizer K_fertilizer irrigated plot_length plot_width harvest_index
Nigeria Ubiaja 6.39177 6.64933 TRUE 15.GS.C0.C1.AYT.58.UBJ 2015-06-07 2016-05-06 FALSE FALSE 1 cassava IITA-TMS-BAD9200068 NA 427 468.75 312.50 roots 468.75 NA NA NA NA 4 4 0.60
Nigeria Ubiaja 6.39177 6.64933 TRUE 15.GS.C0.C1.AYT.58.UBJ 2015-06-07 2016-05-06 FALSE FALSE 1 cassava IITA-TMS-IBA000070 NA 1936 1187.50 750.00 roots 1187.50 NA NA NA NA 4 4 0.61
Nigeria Ubiaja 6.39177 6.64933 TRUE 15.GS.C0.C1.AYT.58.UBJ 2015-06-07 2016-05-06 FALSE FALSE 1 cassava IITA-TMS-IBA010903 NA 4884 500.00 625.00 roots 500.00 NA NA NA NA 4 4 0.44
Nigeria Ubiaja 6.39177 6.64933 TRUE 15.GS.C0.C1.AYT.58.UBJ 2015-06-07 2016-05-06 FALSE FALSE 1 cassava IITA-TMS-IBA011412 NA 1281 875.00 687.50 roots 875.00 NA NA NA NA 4 4 0.56
Nigeria Ubiaja 6.39177 6.64933 TRUE 15.GS.C0.C1.AYT.58.UBJ 2015-06-07 2016-05-06 FALSE FALSE 1 cassava IITA-TMS-IBA020129 NA 9653 875.00 906.25 roots 875.00 NA NA NA NA 4 4 0.49
Nigeria Ubiaja 6.39177 6.64933 TRUE 15.GS.C0.C1.AYT.58.UBJ 2015-06-07 2016-05-06 FALSE FALSE 1 cassava IITA-TMS-IBA020131 NA 9656 1093.75 1343.75 roots 1093.75 NA NA NA NA 4 4 0.45
Nigeria Ubiaja 6.39177 6.64933 TRUE 15.GS.C0.C1.AYT.58.UBJ 2015-06-07 2016-05-06 FALSE FALSE 1 cassava IITA-TMS-IBA020233 NA 9662 750.00 1125.00 roots 750.00 NA NA NA NA 4 4 0.40
Nigeria Ubiaja 6.39177 6.64933 TRUE 15.GS.C0.C1.AYT.58.UBJ 2015-06-07 2016-05-06 FALSE FALSE 1 cassava IITA-TMS-IBA020285 NA 9664 687.50 406.25 roots 687.50 NA NA NA NA 4 4 0.63
Nigeria Ubiaja 6.39177 6.64933 TRUE 15.GS.C0.C1.AYT.58.UBJ 2015-06-07 2016-05-06 FALSE FALSE 1 cassava IITA-TMS-IBA030060 NA 28640 781.25 437.50 roots 781.25 NA NA NA NA 4 4 0.64
Nigeria Ubiaja 6.39177 6.64933 TRUE 15.GS.C0.C1.AYT.58.UBJ 2015-06-07 2016-05-06 FALSE FALSE 1 cassava IITA-TMS-IBA030060A NA 39737 687.50 562.50 roots 687.50 NA NA NA NA 4 4 0.55
Nigeria Ubiaja 6.39177 6.64933 TRUE 15.GS.C0.C1.AYT.58.UBJ 2015-06-07 2016-05-06 FALSE FALSE 1 cassava IITA-TMS-IBA030075 NA 9681 531.25 500.00 roots 531.25 NA NA NA NA 4 4 0.52
Nigeria Ubiaja 6.39177 6.64933 TRUE 15.GS.C0.C1.AYT.58.UBJ 2015-06-07 2016-05-06 FALSE FALSE 1 cassava IITA-TMS-IBA070004 NA 31144 593.75 375.00 roots 593.75 NA NA NA NA 4 4 0.61
Nigeria Ubiaja 6.39177 6.64933 TRUE 15.GS.C0.C1.AYT.58.UBJ 2015-06-07 2016-05-06 FALSE FALSE 1 cassava IITA-TMS-IBA070258 NA 31157 1000.00 593.75 roots 1000.00 NA NA NA NA 4 4 0.63
Nigeria Ubiaja 6.39177 6.64933 TRUE 15.GS.C0.C1.AYT.58.UBJ 2015-06-07 2016-05-06 FALSE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 625.00 687.50 roots 625.00 NA NA NA NA 4 4 0.48
Nigeria Ubiaja 6.39177 6.64933 TRUE 15.GS.C0.C1.AYT.58.UBJ 2015-06-07 2016-05-06 FALSE FALSE 1 cassava IITA-TMS-IBA920211 NA 3807 875.00 812.50 roots 875.00 NA NA NA NA 4 4 0.52
Nigeria Ubiaja 6.39177 6.64933 TRUE 15.GS.C0.C1.AYT.58.UBJ 2015-06-07 2016-05-06 FALSE FALSE 1 cassava IITA-TMS-IBA930265 NA 1473 1062.50 1062.50 roots 1062.50 NA NA NA NA 4 4 0.50
Nigeria Ubiaja 6.39177 6.64933 TRUE 15.GS.C0.C1.AYT.58.UBJ 2015-06-07 2016-05-06 FALSE FALSE 1 cassava IITA-TMS-IBA940237 NA 7 437.50 968.75 roots 437.50 NA NA NA NA 4 4 0.31
Nigeria Ubiaja 6.39177 6.64933 TRUE 15.GS.C0.C1.AYT.58.UBJ 2015-06-07 2016-05-06 FALSE FALSE 1 cassava IITA-TMS-IBA960557 NA 615 812.50 1218.75 roots 812.50 NA NA NA NA 4 4 0.40
Nigeria Ubiaja 6.39177 6.64933 TRUE 15.GS.C0.C1.AYT.58.UBJ 2015-06-07 2016-05-06 FALSE FALSE 1 cassava IITA-TMS-IBA970290 NA 87730 562.50 1031.25 roots 562.50 NA NA NA NA 4 4 0.35
Nigeria Ubiaja 6.39177 6.64933 TRUE 15.GS.C0.C1.AYT.58.UBJ 2015-06-07 2016-05-06 FALSE FALSE 1 cassava IITA-TMS-IBA980581 NA 723 1000.00 781.25 roots 1000.00 NA NA NA NA 4 4 0.56
Nigeria Ubiaja 6.39177 6.64933 TRUE 15.GS.C0.C1.AYT.58.UBJ 2015-06-07 2016-05-06 FALSE FALSE 1 cassava IITA-TMS-IBA982101 NA 725 906.25 875.00 roots 906.25 NA NA NA NA 4 4 0.51
Nigeria Ubiaja 6.39177 6.64933 TRUE 15.GS.C0.C1.AYT.58.UBJ 2015-06-07 2016-05-06 FALSE FALSE 1 cassava IITA-TMS-MOK980068 NA 1768 843.75 843.75 roots 843.75 NA NA NA NA 4 4 0.50
Nigeria Ubiaja 6.39177 6.64933 TRUE 15.GS.C0.C1.AYT.58.UBJ 2015-06-07 2016-05-06 FALSE FALSE 1 cassava TMEB419 NA 39671 218.75 343.75 roots 218.75 NA NA NA NA 4 4 0.39
Nigeria Ubiaja 6.39177 6.64933 TRUE 15.GS.C0.C1.AYT.58.UBJ 2015-06-07 2016-05-06 FALSE FALSE 1 cassava TMS12F1149P0008 NA 408610 1343.75 968.75 roots 1343.75 NA NA NA NA 4 4 0.58
Nigeria Ubiaja 6.39177 6.64933 TRUE 15.GS.C0.C1.AYT.58.UBJ 2015-06-07 2016-05-06 FALSE FALSE 1 cassava TMS13F1006P0027 NA 52402 750.00 781.25 roots 750.00 NA NA NA NA 4 4 0.49


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
174(100.0%)
 0 (0.0%)
location [character] 1. Ubiaja
174(100.0%)
 0 (0.0%)
geo_from_source [logical] 1. TRUE
174(100.0%)
 0 (0.0%)
trial_id [character] 1. 15.GS.C0.C1.AYT.58.U
174(100.0%)
 0 (0.0%)
planting_date [character] 1. 2015-06-07
174(100.0%)
 0 (0.0%)
harvest_date [character] 1. 2016-05-06
174(100.0%)
 0 (0.0%)
on_farm [logical] 1. FALSE
174(100.0%)
 0 (0.0%)
is_survey [logical] 1. FALSE
174(100.0%)
 0 (0.0%)
rep [integer]
Mean (sd) : 2 (0.8)
min ≤ med ≤ max:
1 ≤ 2 ≤ 3
IQR (CV) : 2 (0.4)
1:58(33.3%)
2:58(33.3%)
3:58(33.3%)
 0 (0.0%)
crop [character] 1. cassava
174(100.0%)
 0 (0.0%)
variety [character]
1. IITA-TMS-BAD9200068
2. IITA-TMS-IBA000070
3. IITA-TMS-IBA010903
4. IITA-TMS-IBA011412
5. IITA-TMS-IBA020129
6. IITA-TMS-IBA020131
7. IITA-TMS-IBA020233
8. IITA-TMS-IBA020285
9. IITA-TMS-IBA030060
10. IITA-TMS-IBA030060A
[ 48 others ]
3(1.7%)
3(1.7%)
3(1.7%)
3(1.7%)
3(1.7%)
3(1.7%)
3(1.7%)
3(1.7%)
3(1.7%)
3(1.7%)
144(82.8%)
 0 (0.0%)
variety_alt [logical]
All NA's
 174 (100.0%)
variety_code [integer]
Mean (sd) : 42150.4 (53390.3)
min ≤ med ≤ max:
5 ≤ 48554 ≤ 408610
IQR (CV) : 42768 (1.3)
 58 distinct values 0 (0.0%)
fwy_storage [numeric]
Mean (sd) : 914 (353.8)
min ≤ med ≤ max:
187.5 ≤ 906.2 ≤ 2000
IQR (CV) : 500 (0.4)
 47 distinct values 0 (0.0%)
fwy_residue [numeric]
Mean (sd) : 861.4 (399.1)
min ≤ med ≤ max:
218.8 ≤ 781.2 ≤ 2250
IQR (CV) : 398.4 (0.5)
 50 distinct values 0 (0.0%)
yield_part [character] 1. roots
174(100.0%)
 0 (0.0%)
yield [numeric]
Mean (sd) : 914 (353.8)
min ≤ med ≤ max:
187.5 ≤ 906.2 ≤ 2000
IQR (CV) : 500 (0.4)
 47 distinct values 0 (0.0%)
N_fertilizer [logical]
All NA's
 174 (100.0%)
P_fertilizer [logical]
All NA's
 174 (100.0%)
K_fertilizer [logical]
All NA's
 174 (100.0%)
irrigated [logical]
All NA's
 174 (100.0%)
plot_length [integer] 1 distinct value
4:174(100.0%)
 0 (0.0%)
plot_width [integer] 1 distinct value
4:174(100.0%)
 0 (0.0%)
harvest_index [numeric]
Mean (sd) : 0.5 (0.1)
min ≤ med ≤ max:
0.2 ≤ 0.5 ≤ 0.7
IQR (CV) : 0.2 (0.2)
 45 distinct values 0 (0.0%)