This report describes standardized data for “Assessment of cassava varieties(tetraploid) generated through induced polyploidy using colchicine treatment in a uniformed Yied trial in Zaria (32 clones) 2001/2002 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 (2002). Assessment of cassava varieties(tetraploid) generated through induced polyploidy using colchicine treatment in a uniformed Yied trial in Zaria (32 clones) 2001/2002 Breeding Season. International Institute of Tropical Agriculture (IITA). Not versioned. doi:10.25502/3JMH-PV96

The dataset has 128 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 Zaria 7.71995 11.0855 TRUE 01uyt32colchiZA 2001-08-01 2002-08-01 FALSE FALSE 1 cassava TMEB5 NA 39673 35000 NA roots 35000 NA NA NA NA NA NA
Nigeria Zaria 7.71995 11.0855 TRUE 01uyt32colchiZA 2001-08-01 2002-08-01 FALSE FALSE 1 cassava TMEB203 NA 39649 17000 NA roots 17000 NA NA NA NA NA NA
Nigeria Zaria 7.71995 11.0855 TRUE 01uyt32colchiZA 2001-08-01 2002-08-01 FALSE FALSE 1 cassava SL861(4X) NA 10318 18000 NA roots 18000 NA NA NA NA NA NA
Nigeria Zaria 7.71995 11.0855 TRUE 01uyt32colchiZA 2001-08-01 2002-08-01 FALSE FALSE 1 cassava IITA-TMS-IBA30001 NA 231 4600 NA roots 4600 NA NA NA NA NA NA
Nigeria Zaria 7.71995 11.0855 TRUE 01uyt32colchiZA 2001-08-01 2002-08-01 FALSE FALSE 1 cassava IITA-TMS-IBA30555 NA 235 30000 NA roots 30000 NA NA NA NA NA NA
Nigeria Zaria 7.71995 11.0855 TRUE 01uyt32colchiZA 2001-08-01 2002-08-01 FALSE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 16400 NA roots 16400 NA NA NA NA NA NA
Nigeria Zaria 7.71995 11.0855 TRUE 01uyt32colchiZA 2001-08-01 2002-08-01 FALSE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 32000 NA roots 32000 NA NA NA NA NA NA
Nigeria Zaria 7.71995 11.0855 TRUE 01uyt32colchiZA 2001-08-01 2002-08-01 FALSE FALSE 1 cassava IITA-TMS-IBA4(2)1425 NA 246 19000 NA roots 19000 NA NA NA NA NA NA
Nigeria Zaria 7.71995 11.0855 TRUE 01uyt32colchiZA 2001-08-01 2002-08-01 FALSE FALSE 1 cassava IITA-TMS-IBA4(2)1425 NA 246 31000 NA roots 31000 NA NA NA NA NA NA
Nigeria Zaria 7.71995 11.0855 TRUE 01uyt32colchiZA 2001-08-01 2002-08-01 FALSE FALSE 1 cassava IITA-TMS-IBA8101623(4X) NA 264 11000 NA roots 11000 NA NA NA NA NA NA
Nigeria Zaria 7.71995 11.0855 TRUE 01uyt32colchiZA 2001-08-01 2002-08-01 FALSE FALSE 1 cassava IITA-TMS-IBA8200058 NA 268 20600 NA roots 20600 NA NA NA NA NA NA
Nigeria Zaria 7.71995 11.0855 TRUE 01uyt32colchiZA 2001-08-01 2002-08-01 FALSE FALSE 1 cassava IITA-TMS-IBA8200058 NA 268 12000 NA roots 12000 NA NA NA NA NA NA
Nigeria Zaria 7.71995 11.0855 TRUE 01uyt32colchiZA 2001-08-01 2002-08-01 FALSE FALSE 1 cassava IITA-TMS-IBA8400136 NA 698453 5000 NA roots 5000 NA NA NA NA NA NA
Nigeria Zaria 7.71995 11.0855 TRUE 01uyt32colchiZA 2001-08-01 2002-08-01 FALSE FALSE 1 cassava IITA-TMS-IBA8400316 NA 137958 20000 NA roots 20000 NA NA NA NA NA NA
Nigeria Zaria 7.71995 11.0855 TRUE 01uyt32colchiZA 2001-08-01 2002-08-01 FALSE FALSE 1 cassava IITA-TMS-IBA8900568 NA 1368 20000 NA roots 20000 NA NA NA NA NA NA
Nigeria Zaria 7.71995 11.0855 TRUE 01uyt32colchiZA 2001-08-01 2002-08-01 FALSE FALSE 1 cassava IITA-TMS-IBA9101730 NA 358 20000 NA roots 20000 NA NA NA NA NA NA
Nigeria Zaria 7.71995 11.0855 TRUE 01uyt32colchiZA 2001-08-01 2002-08-01 FALSE FALSE 1 cassava IITA-TMS-IBA9102316 NA 366 14000 NA roots 14000 NA NA NA NA NA NA
Nigeria Zaria 7.71995 11.0855 TRUE 01uyt32colchiZA 2001-08-01 2002-08-01 FALSE FALSE 1 cassava IITA-TMS-IBA9102324 NA 374 46000 NA roots 46000 NA NA NA NA NA NA
Nigeria Zaria 7.71995 11.0855 TRUE 01uyt32colchiZA 2001-08-01 2002-08-01 FALSE FALSE 1 cassava IITA-TMS-IBA9102325 NA 376 15000 NA roots 15000 NA NA NA NA NA NA
Nigeria Zaria 7.71995 11.0855 TRUE 01uyt32colchiZA 2001-08-01 2002-08-01 FALSE FALSE 1 cassava IITA-TMS-IBA9102327 NA 378 35000 NA roots 35000 NA NA NA NA NA NA
Nigeria Zaria 7.71995 11.0855 TRUE 01uyt32colchiZA 2001-08-01 2002-08-01 FALSE FALSE 1 cassava IITA-TMS-IBA91934 NA 380 38000 NA roots 38000 NA NA NA NA NA NA
Nigeria Zaria 7.71995 11.0855 TRUE 01uyt32colchiZA 2001-08-01 2002-08-01 FALSE FALSE 1 cassava IITA-TMS-IBA920057 NA 390 23000 NA roots 23000 NA NA NA NA NA NA
Nigeria Zaria 7.71995 11.0855 TRUE 01uyt32colchiZA 2001-08-01 2002-08-01 FALSE FALSE 1 cassava IITA-TMS-IBA920067 NA 392 20000 NA roots 20000 NA NA NA NA NA NA
Nigeria Zaria 7.71995 11.0855 TRUE 01uyt32colchiZA 2001-08-01 2002-08-01 FALSE FALSE 1 cassava IITA-TMS-IBA920326 NA 396 23000 NA roots 23000 NA NA NA NA NA NA
Nigeria Zaria 7.71995 11.0855 TRUE 01uyt32colchiZA 2001-08-01 2002-08-01 FALSE FALSE 1 cassava IITA-TMS-IBA920342 NA 398 27000 NA roots 27000 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
128(100.0%)
 0 (0.0%)
location [character] 1. Zaria
128(100.0%)
 0 (0.0%)
geo_from_source [logical] 1. TRUE
128(100.0%)
 0 (0.0%)
trial_id [character] 1. 01uyt32colchiZA
128(100.0%)
 0 (0.0%)
planting_date [character] 1. 2001-08-01
128(100.0%)
 0 (0.0%)
harvest_date [character] 1. 2002-08-01
128(100.0%)
 0 (0.0%)
on_farm [logical] 1. FALSE
128(100.0%)
 0 (0.0%)
is_survey [logical] 1. FALSE
128(100.0%)
 0 (0.0%)
rep [integer]
Mean (sd) : 2.5 (1.1)
min ≤ med ≤ max:
1 ≤ 2.5 ≤ 4
IQR (CV) : 1.5 (0.4)
1:32(25.0%)
2:32(25.0%)
3:32(25.0%)
4:32(25.0%)
 0 (0.0%)
crop [character] 1. cassava
128(100.0%)
 0 (0.0%)
variety [character]
1. IITA-TMS-IBA30572
2. IITA-TMS-IBA4(2)1425
3. IITA-TMS-IBA8200058
4. TMEB117
5. IITA-TMS-IBA30001
6. IITA-TMS-IBA30555
7. IITA-TMS-IBA8101623(
8. IITA-TMS-IBA8400136
9. IITA-TMS-IBA8400316
10. IITA-TMS-IBA8900568
[ 18 others ]
8(6.2%)
8(6.2%)
8(6.2%)
8(6.2%)
4(3.1%)
4(3.1%)
4(3.1%)
4(3.1%)
4(3.1%)
4(3.1%)
72(56.2%)
 0 (0.0%)
variety_alt [logical]
All NA's
 128 (100.0%)
variety_code [integer]
Mean (sd) : 36602.3 (122530.4)
min ≤ med ≤ max:
5 ≤ 391 ≤ 698453
IQR (CV) : 39364 (3.3)
 28 distinct values 0 (0.0%)
fwy_storage [integer]
Mean (sd) : 15816.1 (11039.9)
min ≤ med ≤ max:
200 ≤ 13700 ≤ 50000
IQR (CV) : 14400 (0.7)
 66 distinct values 4 (3.1%)
fwy_residue [logical]
All NA's
 128 (100.0%)
yield_part [character] 1. roots
128(100.0%)
 0 (0.0%)
yield [integer]
Mean (sd) : 15816.1 (11039.9)
min ≤ med ≤ max:
200 ≤ 13700 ≤ 50000
IQR (CV) : 14400 (0.7)
 66 distinct values 4 (3.1%)
N_fertilizer [logical]
All NA's
 128 (100.0%)
P_fertilizer [logical]
All NA's
 128 (100.0%)
K_fertilizer [logical]
All NA's
 128 (100.0%)
irrigated [logical]
All NA's
 128 (100.0%)
plot_length [logical]
All NA's
 128 (100.0%)
plot_width [logical]
All NA's
 128 (100.0%)