This report describes standardized data for “Advanced Yield Trial using 29 accessions in Ubiaja selected from 15.GS.C2.PYT.291(extralsel).IK”. 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 (2017). Advanced Yield Trial using 29 accessions in Ubiaja selected from 15.GS.C2.PYT.291(extralsel).IK. International Institute of Tropical Agriculture (IITA). Not versioned. doi:10.25502/348A-2T41

The dataset has 87 records and 27 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
Nigeria Ubiaja 6.39177 6.64933 TRUE 16.GS.C2.extrasel.AYT.29.UB 2016-08-14 2017-07-24 FALSE FALSE 1 cassava IITA-TMS-IBA000070 NA 1936 750.00 406.25 roots 750.00 NA NA NA NA 4 4
Nigeria Ubiaja 6.39177 6.64933 TRUE 16.GS.C2.extrasel.AYT.29.UB 2016-08-14 2017-07-24 FALSE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 812.50 468.75 roots 812.50 NA NA NA NA 4 4
Nigeria Ubiaja 6.39177 6.64933 TRUE 16.GS.C2.extrasel.AYT.29.UB 2016-08-14 2017-07-24 FALSE FALSE 1 cassava IITA-TMS-IBA980581 NA 723 1250.00 718.75 roots 1250.00 NA NA NA NA 4 4
Nigeria Ubiaja 6.39177 6.64933 TRUE 16.GS.C2.extrasel.AYT.29.UB 2016-08-14 2017-07-24 FALSE FALSE 1 cassava IITA-TMS-IBA982101 NA 725 1312.50 781.25 roots 1312.50 NA NA NA NA 4 4
Nigeria Ubiaja 6.39177 6.64933 TRUE 16.GS.C2.extrasel.AYT.29.UB 2016-08-14 2017-07-24 FALSE FALSE 1 cassava TMEB419 NA 39671 906.25 625.00 roots 906.25 NA NA NA NA 4 4
Nigeria Ubiaja 6.39177 6.64933 TRUE 16.GS.C2.extrasel.AYT.29.UB 2016-08-14 2017-07-24 FALSE FALSE 1 cassava TMS14F1017P0012 NA 58325 1250.00 593.75 roots 1250.00 NA NA NA NA 4 4
Nigeria Ubiaja 6.39177 6.64933 TRUE 16.GS.C2.extrasel.AYT.29.UB 2016-08-14 2017-07-24 FALSE FALSE 1 cassava TMS14F1019P0015 NA 58199 500.00 437.50 roots 500.00 NA NA NA NA 4 4
Nigeria Ubiaja 6.39177 6.64933 TRUE 16.GS.C2.extrasel.AYT.29.UB 2016-08-14 2017-07-24 FALSE FALSE 1 cassava TMS14F1049P0001 NA 56646 906.25 468.75 roots 906.25 NA NA NA NA 4 4
Nigeria Ubiaja 6.39177 6.64933 TRUE 16.GS.C2.extrasel.AYT.29.UB 2016-08-14 2017-07-24 FALSE FALSE 1 cassava TMS14F1097P0016 NA 57015 750.00 312.50 roots 750.00 NA NA NA NA 4 4
Nigeria Ubiaja 6.39177 6.64933 TRUE 16.GS.C2.extrasel.AYT.29.UB 2016-08-14 2017-07-24 FALSE FALSE 1 cassava TMS14F1098P0002 NA 57021 1000.00 468.75 roots 1000.00 NA NA NA NA 4 4
Nigeria Ubiaja 6.39177 6.64933 TRUE 16.GS.C2.extrasel.AYT.29.UB 2016-08-14 2017-07-24 FALSE FALSE 1 cassava TMS14F1124P0002 NA 57218 937.50 468.75 roots 937.50 NA NA NA NA 4 4
Nigeria Ubiaja 6.39177 6.64933 TRUE 16.GS.C2.extrasel.AYT.29.UB 2016-08-14 2017-07-24 FALSE FALSE 1 cassava TMS14F1125P0010 NA 57233 1250.00 406.25 roots 1250.00 NA NA NA NA 4 4
Nigeria Ubiaja 6.39177 6.64933 TRUE 16.GS.C2.extrasel.AYT.29.UB 2016-08-14 2017-07-24 FALSE FALSE 1 cassava TMS14F1194P0002 NA 57607 1000.00 312.50 roots 1000.00 NA NA NA NA 4 4
Nigeria Ubiaja 6.39177 6.64933 TRUE 16.GS.C2.extrasel.AYT.29.UB 2016-08-14 2017-07-24 FALSE FALSE 1 cassava TMS14F1194P0003 NA 407647 968.75 656.25 roots 968.75 NA NA NA NA 4 4
Nigeria Ubiaja 6.39177 6.64933 TRUE 16.GS.C2.extrasel.AYT.29.UB 2016-08-14 2017-07-24 FALSE FALSE 1 cassava TMS14F1223P0007 NA 57757 906.25 218.75 roots 906.25 NA NA NA NA 4 4
Nigeria Ubiaja 6.39177 6.64933 TRUE 16.GS.C2.extrasel.AYT.29.UB 2016-08-14 2017-07-24 FALSE FALSE 1 cassava TMS14F1248P0010 NA 57922 906.25 781.25 roots 906.25 NA NA NA NA 4 4
Nigeria Ubiaja 6.39177 6.64933 TRUE 16.GS.C2.extrasel.AYT.29.UB 2016-08-14 2017-07-24 FALSE FALSE 1 cassava TMS14F1262P0002 NA 58009 1125.00 437.50 roots 1125.00 NA NA NA NA 4 4
Nigeria Ubiaja 6.39177 6.64933 TRUE 16.GS.C2.extrasel.AYT.29.UB 2016-08-14 2017-07-24 FALSE FALSE 1 cassava TMS14F1284P0014 NA 49956 781.25 468.75 roots 781.25 NA NA NA NA 4 4
Nigeria Ubiaja 6.39177 6.64933 TRUE 16.GS.C2.extrasel.AYT.29.UB 2016-08-14 2017-07-24 FALSE FALSE 1 cassava TMS14F1288P0007 NA 49706 1000.00 250.00 roots 1000.00 NA NA NA NA 4 4
Nigeria Ubiaja 6.39177 6.64933 TRUE 16.GS.C2.extrasel.AYT.29.UB 2016-08-14 2017-07-24 FALSE FALSE 1 cassava TMS14F1292P0012 NA 50137 1187.50 750.00 roots 1187.50 NA NA NA NA 4 4
Nigeria Ubiaja 6.39177 6.64933 TRUE 16.GS.C2.extrasel.AYT.29.UB 2016-08-14 2017-07-24 FALSE FALSE 1 cassava TMS14F1295P0006 NA 50005 1062.50 531.25 roots 1062.50 NA NA NA NA 4 4
Nigeria Ubiaja 6.39177 6.64933 TRUE 16.GS.C2.extrasel.AYT.29.UB 2016-08-14 2017-07-24 FALSE FALSE 1 cassava TMS14F1297P0019 NA 49580 1000.00 593.75 roots 1000.00 NA NA NA NA 4 4
Nigeria Ubiaja 6.39177 6.64933 TRUE 16.GS.C2.extrasel.AYT.29.UB 2016-08-14 2017-07-24 FALSE FALSE 1 cassava TMS14F1298P0009 NA 50087 1125.00 593.75 roots 1125.00 NA NA NA NA 4 4
Nigeria Ubiaja 6.39177 6.64933 TRUE 16.GS.C2.extrasel.AYT.29.UB 2016-08-14 2017-07-24 FALSE FALSE 1 cassava TMS14F1299P0007 NA 50100 1000.00 625.00 roots 1000.00 NA NA NA NA 4 4
Nigeria Ubiaja 6.39177 6.64933 TRUE 16.GS.C2.extrasel.AYT.29.UB 2016-08-14 2017-07-24 FALSE FALSE 1 cassava TMS14F1304P0008 NA 49763 1093.75 406.25 roots 1093.75 NA NA NA NA 4 4


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
87(100.0%)
 0 (0.0%)
location [character] 1. Ubiaja
87(100.0%)
 0 (0.0%)
geo_from_source [logical] 1. TRUE
87(100.0%)
 0 (0.0%)
trial_id [character] 1. 16.GS.C2.extrasel.AY
87(100.0%)
 0 (0.0%)
planting_date [character] 1. 2016-08-14
87(100.0%)
 0 (0.0%)
harvest_date [character] 1. 2017-07-24
87(100.0%)
 0 (0.0%)
on_farm [logical] 1. FALSE
87(100.0%)
 0 (0.0%)
is_survey [logical] 1. FALSE
87(100.0%)
 0 (0.0%)
rep [integer]
Mean (sd) : 2 (0.8)
min ≤ med ≤ max:
1 ≤ 2 ≤ 3
IQR (CV) : 2 (0.4)
1:29(33.3%)
2:29(33.3%)
3:29(33.3%)
 0 (0.0%)
crop [character] 1. cassava
87(100.0%)
 0 (0.0%)
variety [character]
1. IITA-TMS-IBA000070
2. IITA-TMS-IBA30572
3. IITA-TMS-IBA980581
4. IITA-TMS-IBA982101
5. TMEB419
6. TMS14F1017P0012
7. TMS14F1019P0015
8. TMS14F1049P0001
9. TMS14F1097P0016
10. TMS14F1098P0002
[ 19 others ]
3(3.4%)
3(3.4%)
3(3.4%)
3(3.4%)
3(3.4%)
3(3.4%)
3(3.4%)
3(3.4%)
3(3.4%)
3(3.4%)
57(65.5%)
 0 (0.0%)
variety_alt [logical]
All NA's
 87 (100.0%)
variety_code [integer]
Mean (sd) : 58015.5 (68991.8)
min ≤ med ≤ max:
5 ≤ 50087 ≤ 407647
IQR (CV) : 7470 (1.2)
 29 distinct values 0 (0.0%)
fwy_storage [numeric]
Mean (sd) : 938.6 (252.6)
min ≤ med ≤ max:
312.5 ≤ 937.5 ≤ 1625
IQR (CV) : 265.6 (0.3)
 31 distinct values 0 (0.0%)
fwy_residue [numeric]
Mean (sd) : 496.4 (171.5)
min ≤ med ≤ max:
218.8 ≤ 468.8 ≤ 1000
IQR (CV) : 281.2 (0.3)
 17 distinct values 0 (0.0%)
yield_part [character] 1. roots
87(100.0%)
 0 (0.0%)
yield [numeric]
Mean (sd) : 938.6 (252.6)
min ≤ med ≤ max:
312.5 ≤ 937.5 ≤ 1625
IQR (CV) : 265.6 (0.3)
 31 distinct values 0 (0.0%)
N_fertilizer [logical]
All NA's
 87 (100.0%)
P_fertilizer [logical]
All NA's
 87 (100.0%)
K_fertilizer [logical]
All NA's
 87 (100.0%)
irrigated [logical]
All NA's
 87 (100.0%)
plot_length [integer] 1 distinct value
4:87(100.0%)
 0 (0.0%)
plot_width [integer] 1 distinct value
4:87(100.0%)
 0 (0.0%)