This report describes standardized data for “Assessment of Varieties of Cassava for high yield and disease resistance using improved germplasm lines (416 clones) in Mokwa 1998/1999 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 (1999). Assessment of Varieties of Cassava for high yield and disease resistance using improved germplasm lines (416 clones) in Mokwa 1998/1999 Breeding Season. International Institute of Tropical Agriculture (IITA). Not versioned. doi:10.25502/PNXT-HJ79

The dataset has 416 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 dmy_storage fwy_storage fwy_residue yield_part yield N_fertilizer P_fertilizer K_fertilizer irrigated plot_length plot_width
Nigeria Mokwa 5.31025 9.23942 TRUE 98impgermpMK 1998-06-13 1999-06-14 FALSE FALSE 1 cassava IITA-TMS-IBA8901018 NA 808272 9.22 50400 NA roots 50400 NA NA NA NA NA NA
Nigeria Mokwa 5.31025 9.23942 TRUE 98impgermpMK 1998-06-13 1999-06-14 FALSE FALSE 1 cassava IITA-TMS-IBA8900797 NA 808376 3.68 11200 NA roots 11200 NA NA NA NA NA NA
Nigeria Mokwa 5.31025 9.23942 TRUE 98impgermpMK 1998-06-13 1999-06-14 FALSE FALSE 1 cassava IITA-TMS-IBA8500680 NA 278 1.86 10800 NA roots 10800 NA NA NA NA NA NA
Nigeria Mokwa 5.31025 9.23942 TRUE 98impgermpMK 1998-06-13 1999-06-14 FALSE FALSE 1 cassava IITA-TMS-IBA9100567 NA 802537 4.53 22000 NA roots 22000 NA NA NA NA NA NA
Nigeria Mokwa 5.31025 9.23942 TRUE 98impgermpMK 1998-06-13 1999-06-14 FALSE FALSE 1 cassava IITA-TMS-IBA8901111 NA 676843 4.59 15000 NA roots 15000 NA NA NA NA NA NA
Nigeria Mokwa 5.31025 9.23942 TRUE 98impgermpMK 1998-06-13 1999-06-14 FALSE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 5.33 18000 NA roots 18000 NA NA NA NA NA NA
Nigeria Mokwa 5.31025 9.23942 TRUE 98impgermpMK 1998-06-13 1999-06-14 FALSE FALSE 1 cassava IITA-TMS-IBA8800006 NA 808293 2.81 8400 NA roots 8400 NA NA NA NA NA NA
Nigeria Mokwa 5.31025 9.23942 TRUE 98impgermpMK 1998-06-13 1999-06-14 FALSE FALSE 1 cassava IITA-TMS-IBA920057 NA 390 9.98 30800 NA roots 30800 NA NA NA NA NA NA
Nigeria Mokwa 5.31025 9.23942 TRUE 98impgermpMK 1998-06-13 1999-06-14 FALSE FALSE 1 cassava IITA-TMS-IBA8902188 NA 808259 1.38 5200 NA roots 5200 NA NA NA NA NA NA
Nigeria Mokwa 5.31025 9.23942 TRUE 98impgermpMK 1998-06-13 1999-06-14 FALSE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 4.85 21000 NA roots 21000 NA NA NA NA NA NA
Nigeria Mokwa 5.31025 9.23942 TRUE 98impgermpMK 1998-06-13 1999-06-14 FALSE FALSE 1 cassava IITA-TMS-IBA920211 NA 3807 7.56 28000 NA roots 28000 NA NA NA NA NA NA
Nigeria Mokwa 5.31025 9.23942 TRUE 98impgermpMK 1998-06-13 1999-06-14 FALSE FALSE 1 cassava IITA-TMS-IBA8802234 NA 808253 4.02 13000 NA roots 13000 NA NA NA NA NA NA
Nigeria Mokwa 5.31025 9.23942 TRUE 98impgermpMK 1998-06-13 1999-06-14 FALSE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 9.07 26000 NA roots 26000 NA NA NA NA NA NA
Nigeria Mokwa 5.31025 9.23942 TRUE 98impgermpMK 1998-06-13 1999-06-14 FALSE FALSE 1 cassava IITA-TMS-IBA8902831 NA 304 1.32 9000 NA roots 9000 NA NA NA NA NA NA
Nigeria Mokwa 5.31025 9.23942 TRUE 98impgermpMK 1998-06-13 1999-06-14 FALSE FALSE 1 cassava IITA-TMS-IBA8802343 NA 290 NA 11200 NA roots 11200 NA NA NA NA NA NA
Nigeria Mokwa 5.31025 9.23942 TRUE 98impgermpMK 1998-06-13 1999-06-14 FALSE FALSE 1 cassava IITA-TMS-IBA8701006 NA 808269 5.46 14800 NA roots 14800 NA NA NA NA NA NA
Nigeria Mokwa 5.31025 9.23942 TRUE 98impgermpMK 1998-06-13 1999-06-14 FALSE FALSE 1 cassava IITA-TMS-IBA8100202 NA 808437 3.16 9200 NA roots 9200 NA NA NA NA NA NA
Nigeria Mokwa 5.31025 9.23942 TRUE 98impgermpMK 1998-06-13 1999-06-14 FALSE FALSE 1 cassava IITA-TMS-IBA9100961 NA 811543 3.16 12800 NA roots 12800 NA NA NA NA NA NA
Nigeria Mokwa 5.31025 9.23942 TRUE 98impgermpMK 1998-06-13 1999-06-14 FALSE FALSE 1 cassava IITA-TMS-IBA8802433 NA 811539 5.52 16000 NA roots 16000 NA NA NA NA NA NA
Nigeria Mokwa 5.31025 9.23942 TRUE 98impgermpMK 1998-06-13 1999-06-14 FALSE FALSE 1 cassava IITA-TMS-IBA8800005 NA 811536 4.95 15000 NA roots 15000 NA NA NA NA NA NA
Nigeria Mokwa 5.31025 9.23942 TRUE 98impgermpMK 1998-06-13 1999-06-14 FALSE FALSE 1 cassava IITA-TMS-IBA8901327 NA 808308 7.26 27200 NA roots 27200 NA NA NA NA NA NA
Nigeria Mokwa 5.31025 9.23942 TRUE 98impgermpMK 1998-06-13 1999-06-14 FALSE FALSE 1 cassava I61036 NA 811567 5.01 16000 NA roots 16000 NA NA NA NA NA NA
Nigeria Mokwa 5.31025 9.23942 TRUE 98impgermpMK 1998-06-13 1999-06-14 FALSE FALSE 1 cassava IITA-TMS-IBA8800289 NA 811538 1.08 4000 NA roots 4000 NA NA NA NA NA NA
Nigeria Mokwa 5.31025 9.23942 TRUE 98impgermpMK 1998-06-13 1999-06-14 FALSE FALSE 1 cassava IITA-TMS-IBA8900911 NA 808306 2.80 15200 NA roots 15200 NA NA NA NA NA NA
Nigeria Mokwa 5.31025 9.23942 TRUE 98impgermpMK 1998-06-13 1999-06-14 FALSE FALSE 1 cassava IITA-TMS-IBA9002030 NA 1382 2.62 14000 NA roots 14000 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
fwy_storage (1000, 60000)

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
416(100.0%)
 0 (0.0%)
location [character] 1. Mokwa
416(100.0%)
 0 (0.0%)
geo_from_source [logical] 1. TRUE
416(100.0%)
 0 (0.0%)
trial_id [character] 1. 98impgermpMK
416(100.0%)
 0 (0.0%)
planting_date [character] 1. 1998-06-13
416(100.0%)
 0 (0.0%)
harvest_date [character] 1. 1999-06-14
416(100.0%)
 0 (0.0%)
on_farm [logical] 1. FALSE
416(100.0%)
 0 (0.0%)
is_survey [logical] 1. FALSE
416(100.0%)
 0 (0.0%)
rep [integer] 1 distinct value
1:416(100.0%)
 0 (0.0%)
crop [character] 1. cassava
416(100.0%)
 0 (0.0%)
variety [character]
1. IITA-TMS-IBA30572
2. TMEB1
3. IITA-TMS-IBA8900531
4. IITA-TMS-IBA4(2)1425
5. IITA-TMS-IBA8802555
6. IITA-TMS-ONN8500036
7. 50395
8. 58308
9. CB-10(80411)
10. CB71673
[ 375 others ]
17(4.1%)
11(2.6%)
3(0.7%)
2(0.5%)
2(0.5%)
2(0.5%)
1(0.2%)
1(0.2%)
1(0.2%)
1(0.2%)
375(90.1%)
 0 (0.0%)
variety_alt [logical]
All NA's
 416 (100.0%)
variety_code [integer]
Mean (sd) : 533701.8 (370198.3)
min ≤ med ≤ max:
3 ≤ 808252.5 ≤ 811570
IQR (CV) : 807067.8 (0.7)
 385 distinct values 0 (0.0%)
dmy_storage [numeric]
Mean (sd) : 4.7 (2.5)
min ≤ med ≤ max:
0.4 ≤ 4.4 ≤ 15.4
IQR (CV) : 2.9 (0.5)
 282 distinct values 52 (12.5%)
fwy_storage [integer]
Mean (sd) : 14893.9 (8031.5)
min ≤ med ≤ max:
1000 ≤ 14000 ≤ 60000
IQR (CV) : 9200 (0.5)
 102 distinct values 7 (1.7%)
fwy_residue [logical]
All NA's
 416 (100.0%)
yield_part [character] 1. roots
416(100.0%)
 0 (0.0%)
yield [integer]
Mean (sd) : 14893.9 (8031.5)
min ≤ med ≤ max:
1000 ≤ 14000 ≤ 60000
IQR (CV) : 9200 (0.5)
 102 distinct values 7 (1.7%)
N_fertilizer [logical]
All NA's
 416 (100.0%)
P_fertilizer [logical]
All NA's
 416 (100.0%)
K_fertilizer [logical]
All NA's
 416 (100.0%)
irrigated [logical]
All NA's
 416 (100.0%)
plot_length [logical]
All NA's
 416 (100.0%)
plot_width [logical]
All NA's
 416 (100.0%)