This report describes standardized data for “Assessment of Varieties of Cassava for high yield, disease resistance in a Preliminary Yield Trial (104 clones) at Warri in 1996/97 Breeding Season.”. These data were standardized on 2024-09-18 by Robert Hijmans with this R script. The original data are available here under a CC-BY license.

This is the full citation of the data set:

Kulakow, Peter; Ismail Rabbi; Elizabeth Parkes; Chiedozie Egesi; Olufemi Aina; Prasad Peteti; Agbona Afolabi (1997). Assessment of Varieties of Cassava for high yield, disease resistance in a Preliminary Yield Trial (104 clones) at Warri in 1996/97 Breeding Season. International Institute of Tropical Agriculture (IITA). doi:10.25502/W6AZ-5628

The dataset has 236 records and 27 variables for cassava in Nigeria.


These are the first 25 records:

records
dataset_id trial_id record_id country location longitude latitude geo_from_source 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
doi_10.25502_W6AZ-5628 96pyt104WR 1 Nigeria Warri 5.7932 5.5544 TRUE 1996-05-04 1997-06-06 FALSE FALSE 1 cassava IITA-TMS-IBA940016 NA 682488 10000 NA roots 10000 NA NA NA NA NA NA
doi_10.25502_W6AZ-5628 96pyt104WR 2 Nigeria Warri 5.7932 5.5544 TRUE 1996-05-04 1997-06-06 FALSE FALSE 1 cassava IITA-TMS-IBA940024 NA 802519 18000 NA roots 18000 NA NA NA NA NA NA
doi_10.25502_W6AZ-5628 96pyt104WR 3 Nigeria Warri 5.7932 5.5544 TRUE 1996-05-04 1997-06-06 FALSE FALSE 1 cassava IITA-TMS-IBA940034 NA 799018 6000 NA roots 6000 NA NA NA NA NA NA
doi_10.25502_W6AZ-5628 96pyt104WR 4 Nigeria Warri 5.7932 5.5544 TRUE 1996-05-04 1997-06-06 FALSE FALSE 1 cassava IITA-TMS-IBA940035 NA 1182946 3200 NA roots 3200 NA NA NA NA NA NA
doi_10.25502_W6AZ-5628 96pyt104WR 5 Nigeria Warri 5.7932 5.5544 TRUE 1996-05-04 1997-06-06 FALSE FALSE 1 cassava IITA-TMS-IBA940048 NA 802489 13400 NA roots 13400 NA NA NA NA NA NA
doi_10.25502_W6AZ-5628 96pyt104WR 6 Nigeria Warri 5.7932 5.5544 TRUE 1996-05-04 1997-06-06 FALSE FALSE 1 cassava IITA-TMS-IBA940050 NA 1182954 10000 NA roots 10000 NA NA NA NA NA NA
doi_10.25502_W6AZ-5628 96pyt104WR 7 Nigeria Warri 5.7932 5.5544 TRUE 1996-05-04 1997-06-06 FALSE FALSE 1 cassava IITA-TMS-IBA940058 NA 1182960 10000 NA roots 10000 NA NA NA NA NA NA
doi_10.25502_W6AZ-5628 96pyt104WR 8 Nigeria Warri 5.7932 5.5544 TRUE 1996-05-04 1997-06-06 FALSE FALSE 1 cassava IITA-TMS-IBA940063 NA 1182964 5200 NA roots 5200 NA NA NA NA NA NA
doi_10.25502_W6AZ-5628 96pyt104WR 9 Nigeria Warri 5.7932 5.5544 TRUE 1996-05-04 1997-06-06 FALSE FALSE 1 cassava IITA-TMS-IBA940068 NA 1182967 12800 NA roots 12800 NA NA NA NA NA NA
doi_10.25502_W6AZ-5628 96pyt104WR 10 Nigeria Warri 5.7932 5.5544 TRUE 1996-05-04 1997-06-06 FALSE FALSE 1 cassava IITA-TMS-IBA940071 NA 1182969 6000 NA roots 6000 NA NA NA NA NA NA
doi_10.25502_W6AZ-5628 96pyt104WR 11 Nigeria Warri 5.7932 5.5544 TRUE 1996-05-04 1997-06-06 FALSE FALSE 1 cassava IITA-TMS-IBA940076 NA 1182972 18000 NA roots 18000 NA NA NA NA NA NA
doi_10.25502_W6AZ-5628 96pyt104WR 12 Nigeria Warri 5.7932 5.5544 TRUE 1996-05-04 1997-06-06 FALSE FALSE 1 cassava IITA-TMS-IBA940101 NA 698097 14000 NA roots 14000 NA NA NA NA NA NA
doi_10.25502_W6AZ-5628 96pyt104WR 13 Nigeria Warri 5.7932 5.5544 TRUE 1996-05-04 1997-06-06 FALSE FALSE 1 cassava IITA-TMS-IBA940115 NA 1183002 10000 NA roots 10000 NA NA NA NA NA NA
doi_10.25502_W6AZ-5628 96pyt104WR 14 Nigeria Warri 5.7932 5.5544 TRUE 1996-05-04 1997-06-06 FALSE FALSE 1 cassava IITA-TMS-IBA940120 NA 802492 26000 NA roots 26000 NA NA NA NA NA NA
doi_10.25502_W6AZ-5628 96pyt104WR 15 Nigeria Warri 5.7932 5.5544 TRUE 1996-05-04 1997-06-06 FALSE FALSE 1 cassava IITA-TMS-IBA940122 NA 1183007 6000 NA roots 6000 NA NA NA NA NA NA
doi_10.25502_W6AZ-5628 96pyt104WR 16 Nigeria Warri 5.7932 5.5544 TRUE 1996-05-04 1997-06-06 FALSE FALSE 1 cassava IITA-TMS-IBA940123 NA 1183008 4000 NA roots 4000 NA NA NA NA NA NA
doi_10.25502_W6AZ-5628 96pyt104WR 17 Nigeria Warri 5.7932 5.5544 TRUE 1996-05-04 1997-06-06 FALSE FALSE 1 cassava IITA-TMS-IBA940129 NA 1183013 800 NA roots 800 NA NA NA NA NA NA
doi_10.25502_W6AZ-5628 96pyt104WR 18 Nigeria Warri 5.7932 5.5544 TRUE 1996-05-04 1997-06-06 FALSE FALSE 1 cassava IITA-TMS-IBA940131 NA 1437274 10000 NA roots 10000 NA NA NA NA NA NA
doi_10.25502_W6AZ-5628 96pyt104WR 19 Nigeria Warri 5.7932 5.5544 TRUE 1996-05-04 1997-06-06 FALSE FALSE 1 cassava IITA-TMS-IBA940154 NA 1183031 8000 NA roots 8000 NA NA NA NA NA NA
doi_10.25502_W6AZ-5628 96pyt104WR 20 Nigeria Warri 5.7932 5.5544 TRUE 1996-05-04 1997-06-06 FALSE FALSE 1 cassava IITA-TMS-IBA940161 NA 1183037 10000 NA roots 10000 NA NA NA NA NA NA
doi_10.25502_W6AZ-5628 96pyt104WR 21 Nigeria Warri 5.7932 5.5544 TRUE 1996-05-04 1997-06-06 FALSE FALSE 1 cassava IITA-TMS-IBA940164 NA 1183040 12000 NA roots 12000 NA NA NA NA NA NA
doi_10.25502_W6AZ-5628 96pyt104WR 22 Nigeria Warri 5.7932 5.5544 TRUE 1996-05-04 1997-06-06 FALSE FALSE 1 cassava IITA-TMS-IBA940173 NA 1183045 17200 NA roots 17200 NA NA NA NA NA NA
doi_10.25502_W6AZ-5628 96pyt104WR 23 Nigeria Warri 5.7932 5.5544 TRUE 1996-05-04 1997-06-06 FALSE FALSE 1 cassava IITA-TMS-IBA940175 NA 802493 14000 NA roots 14000 NA NA NA NA NA NA
doi_10.25502_W6AZ-5628 96pyt104WR 24 Nigeria Warri 5.7932 5.5544 TRUE 1996-05-04 1997-06-06 FALSE FALSE 1 cassava IITA-TMS-IBA940176 NA 1183047 11200 NA roots 11200 NA NA NA NA NA NA
doi_10.25502_W6AZ-5628 96pyt104WR 25 Nigeria Warri 5.7932 5.5544 TRUE 1996-05-04 1997-06-06 FALSE FALSE 1 cassava IITA-TMS-IBA940180 NA 1183050 1200 NA roots 1200 NA NA NA NA NA NA


The dataset has 115 treatments:

treatments
variety
IITA-TMS-IBA910120
IITA-TMS-IBA940001
IITA-TMS-IBA940004
IITA-TMS-IBA940005
IITA-TMS-IBA940006
IITA-TMS-IBA940016
IITA-TMS-IBA940021
IITA-TMS-IBA940024
IITA-TMS-IBA940034
IITA-TMS-IBA940035
IITA-TMS-IBA940041
IITA-TMS-IBA940045
IITA-TMS-IBA940047
IITA-TMS-IBA940048
IITA-TMS-IBA940050
IITA-TMS-IBA940058
IITA-TMS-IBA940063
IITA-TMS-IBA940064
IITA-TMS-IBA940068
IITA-TMS-IBA940071
IITA-TMS-IBA940076
IITA-TMS-IBA940079
IITA-TMS-IBA940081
IITA-TMS-IBA940086
IITA-TMS-IBA940090
IITA-TMS-IBA940101
IITA-TMS-IBA940103
IITA-TMS-IBA940115
IITA-TMS-IBA940120
IITA-TMS-IBA940122
IITA-TMS-IBA940123
IITA-TMS-IBA940129
IITA-TMS-IBA940131
IITA-TMS-IBA940154
IITA-TMS-IBA940161
IITA-TMS-IBA940164
IITA-TMS-IBA940173
IITA-TMS-IBA940175
IITA-TMS-IBA940176
IITA-TMS-IBA940180
IITA-TMS-IBA940186
IITA-TMS-IBA940201
IITA-TMS-IBA940211
IITA-TMS-IBA940213
IITA-TMS-IBA940220
IITA-TMS-IBA940221
IITA-TMS-IBA940236
IITA-TMS-IBA940273
IITA-TMS-IBA940275
IITA-TMS-IBA940282
IITA-TMS-IBA940283
IITA-TMS-IBA940287
IITA-TMS-IBA940295
IITA-TMS-IBA940301
IITA-TMS-IBA940303
IITA-TMS-IBA940304
IITA-TMS-IBA940305
IITA-TMS-IBA940306
IITA-TMS-IBA940308
IITA-TMS-IBA940325
IITA-TMS-IBA940341
IITA-TMS-IBA940342
IITA-TMS-IBA940366
IITA-TMS-IBA940367
IITA-TMS-IBA940368
IITA-TMS-IBA940382
IITA-TMS-IBA940388
IITA-TMS-IBA940391
IITA-TMS-IBA940395
IITA-TMS-IBA940396
IITA-TMS-IBA940400
IITA-TMS-IBA940402
IITA-TMS-IBA940412
IITA-TMS-IBA940419
IITA-TMS-IBA940421
IITA-TMS-IBA940428
IITA-TMS-IBA940431
IITA-TMS-IBA940437
IITA-TMS-IBA940445
IITA-TMS-IBA940451
IITA-TMS-IBA940455
IITA-TMS-IBA940461
IITA-TMS-IBA940465
IITA-TMS-IBA940487
IITA-TMS-IBA940488
IITA-TMS-IBA940490
IITA-TMS-IBA940500
IITA-TMS-IBA940502
IITA-TMS-IBA940503
IITA-TMS-IBA940512
IITA-TMS-IBA940515
IITA-TMS-IBA940520
IITA-TMS-IBA940523
IITA-TMS-IBA940526
IITA-TMS-IBA940527
IITA-TMS-IBA940536
IITA-TMS-IBA940538
IITA-TMS-IBA940540
IITA-TMS-IBA940544
IITA-TMS-IBA940546
IITA-TMS-IBA940548
IITA-TMS-IBA940553
IITA-TMS-IBA940556
IITA-TMS-IBA940557
IITA-TMS-IBA940558
IITA-TMS-IBA940560
IITA-TMS-IBA940561
IITA-TMS-IBA940566
IITA-TMS-IBA940574
IITA-TMS-IBA940581
IITA-TMS-IBA940583
IITA-TMS-IBA940586
IITA-TMS-IBA940641
IITA-TMS-IBA942523
IITA-TMS-WAR4092

The observations are for 1 locations, for which we have 1 unique mapped locations.


The data are further summarized in the table below

Variable Stats / Values Freqs (% of Valid) Graph Missing
dataset_id [character] 1. doi_10.25502_W6AZ-56
236(100.0%)
 0 (0.0%)
trial_id [character] 1. 96pyt104WR
236(100.0%)
 0 (0.0%)
record_id [integer]
Mean (sd) : 118.5 (68.3)
min ≤ med ≤ max:
1 ≤ 118.5 ≤ 236
IQR (CV) : 117.5 (0.6)
 236 distinct values (Integer sequence) 0 (0.0%)
country [character] 1. Nigeria
236(100.0%)
 0 (0.0%)
location [character] 1. Warri
236(100.0%)
 0 (0.0%)
geo_from_source [logical] 1. TRUE
236(100.0%)
 0 (0.0%)
planting_date [character] 1. 1996-05-04
236(100.0%)
 0 (0.0%)
harvest_date [character] 1. 1997-06-06
236(100.0%)
 0 (0.0%)
on_farm [logical] 1. FALSE
236(100.0%)
 0 (0.0%)
is_survey [logical] 1. FALSE
236(100.0%)
 0 (0.0%)
rep [integer]
Min : 1
Mean : 1.6
Max : 2
1:104(44.1%)
2:132(55.9%)
 0 (0.0%)
crop [character] 1. cassava
236(100.0%)
 0 (0.0%)
variety [character]
1. IITA-TMS-WAR4092
2. IITA-TMS-IBA940016
3. IITA-TMS-IBA940021
4. IITA-TMS-IBA940024
5. IITA-TMS-IBA940034
6. IITA-TMS-IBA940035
7. IITA-TMS-IBA940045
8. IITA-TMS-IBA940047
9. IITA-TMS-IBA940048
10. IITA-TMS-IBA940050
[ 105 others ]
30(12.7%)
2(0.8%)
2(0.8%)
2(0.8%)
2(0.8%)
2(0.8%)
2(0.8%)
2(0.8%)
2(0.8%)
2(0.8%)
188(79.7%)
 0 (0.0%)
variety_alt [logical]
All NA's
 236 (100.0%)
variety_code [integer]
Mean (sd) : 951213.3 (457626.3)
min ≤ med ≤ max:
138 ≤ 1183011 ≤ 1552209
IQR (CV) : 380795.2 (0.5)
 115 distinct values 0 (0.0%)
fwy_storage [integer]
Mean (sd) : 10426.8 (7826)
min ≤ med ≤ max:
800 ≤ 8000 ≤ 56000
IQR (CV) : 10000 (0.8)
 51 distinct values 27 (11.4%)
fwy_residue [logical]
All NA's
 236 (100.0%)
yield_part [character] 1. roots
236(100.0%)
 0 (0.0%)
yield [integer]
Mean (sd) : 10426.8 (7826)
min ≤ med ≤ max:
800 ≤ 8000 ≤ 56000
IQR (CV) : 10000 (0.8)
 51 distinct values 27 (11.4%)
N_fertilizer [logical]
All NA's
 236 (100.0%)
P_fertilizer [logical]
All NA's
 236 (100.0%)
K_fertilizer [logical]
All NA's
 236 (100.0%)
irrigated [logical]
All NA's
 236 (100.0%)
plot_length [logical]
All NA's
 236 (100.0%)
plot_width [logical]
All NA's
 236 (100.0%)