This report describes standardized data for “Assessment of Varieties of Cassava for high yield, disease resistance in a Preliminary Yield Trial (113 clones) in Ibadan 1999/2000 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 (2000). Assessment of Varieties of Cassava for high yield, disease resistance in a Preliminary Yield Trial (113 clones) in Ibadan 1999/2000 Breeding Season. International Institute of Tropical Agriculture (IITA). doi:10.25502/ESBZ-5S84

The dataset has 277 records and 29 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 dmy_storage fwy_storage fwy_residue yield_part yield N_fertilizer P_fertilizer K_fertilizer irrigated plot_length plot_width harvest_index
doi_10.25502_ESBZ-5S84 99pyt142IB 1 Nigeria Ibadan 3.94704 7.37754 TRUE 1999-12-14 2000-12-14 FALSE FALSE 1 cassava IITA-TMS-IBA30572 NA 5 2.23 5200 NA roots 5200 NA NA NA NA NA NA 0.51
doi_10.25502_ESBZ-5S84 99pyt142IB 2 Nigeria Ibadan 3.94704 7.37754 TRUE 1999-12-14 2000-12-14 FALSE FALSE 1 cassava IITA-TMS-IBA9102324 NA 374 1.69 4000 NA roots 4000 NA NA NA NA NA NA 0.67
doi_10.25502_ESBZ-5S84 99pyt142IB 3 Nigeria Ibadan 3.94704 7.37754 TRUE 1999-12-14 2000-12-14 FALSE FALSE 1 cassava IITA-TMS-IBA920326 NA 396 2.70 7000 NA roots 7000 NA NA NA NA NA NA 0.64
doi_10.25502_ESBZ-5S84 99pyt142IB 4 Nigeria Ibadan 3.94704 7.37754 TRUE 1999-12-14 2000-12-14 FALSE FALSE 1 cassava IITA-TMS-IBA990799 NA 1153546 2.06 5000 NA roots 5000 NA NA NA NA NA NA 0.59
doi_10.25502_ESBZ-5S84 99pyt142IB 5 Nigeria Ibadan 3.94704 7.37754 TRUE 1999-12-14 2000-12-14 FALSE FALSE 1 cassava IITA-TMS-IBA990803 NA 1153550 NA 100 NA roots 100 NA NA NA NA NA NA 0.05
doi_10.25502_ESBZ-5S84 99pyt142IB 6 Nigeria Ibadan 3.94704 7.37754 TRUE 1999-12-14 2000-12-14 FALSE FALSE 1 cassava IITA-TMS-IBA990837 NA 1153584 0.52 1800 NA roots 1800 NA NA NA NA NA NA 0.38
doi_10.25502_ESBZ-5S84 99pyt142IB 7 Nigeria Ibadan 3.94704 7.37754 TRUE 1999-12-14 2000-12-14 FALSE FALSE 1 cassava IITA-TMS-IBA990841 NA 1153588 0.41 1200 NA roots 1200 NA NA NA NA NA NA 0.19
doi_10.25502_ESBZ-5S84 99pyt142IB 8 Nigeria Ibadan 3.94704 7.37754 TRUE 1999-12-14 2000-12-14 FALSE FALSE 1 cassava IITA-TMS-IBA990869 NA 1153616 NA 300 NA roots 300 NA NA NA NA NA NA 0.12
doi_10.25502_ESBZ-5S84 99pyt142IB 9 Nigeria Ibadan 3.94704 7.37754 TRUE 1999-12-14 2000-12-14 FALSE FALSE 1 cassava IITA-TMS-IBA990895 NA 1153651 0.94 2200 NA roots 2200 NA NA NA NA NA NA 0.35
doi_10.25502_ESBZ-5S84 99pyt142IB 10 Nigeria Ibadan 3.94704 7.37754 TRUE 1999-12-14 2000-12-14 FALSE FALSE 1 cassava IITA-TMS-IBA990909 NA 1153665 1.66 4800 NA roots 4800 NA NA NA NA NA NA 0.63
doi_10.25502_ESBZ-5S84 99pyt142IB 11 Nigeria Ibadan 3.94704 7.37754 TRUE 1999-12-14 2000-12-14 FALSE FALSE 1 cassava IITA-TMS-IBA990911 NA 1153667 1.15 3000 NA roots 3000 NA NA NA NA NA NA 0.60
doi_10.25502_ESBZ-5S84 99pyt142IB 12 Nigeria Ibadan 3.94704 7.37754 TRUE 1999-12-14 2000-12-14 FALSE FALSE 1 cassava IITA-TMS-IBA990913 NA 1153669 2.59 6200 NA roots 6200 NA NA NA NA NA NA 0.61
doi_10.25502_ESBZ-5S84 99pyt142IB 13 Nigeria Ibadan 3.94704 7.37754 TRUE 1999-12-14 2000-12-14 FALSE FALSE 1 cassava IITA-TMS-IBA990925 NA 1153681 1.08 3000 NA roots 3000 NA NA NA NA NA NA 0.60
doi_10.25502_ESBZ-5S84 99pyt142IB 14 Nigeria Ibadan 3.94704 7.37754 TRUE 1999-12-14 2000-12-14 FALSE FALSE 1 cassava IITA-TMS-IBA990926 NA 1153682 3.83 9400 NA roots 9400 NA NA NA NA NA NA 0.57
doi_10.25502_ESBZ-5S84 99pyt142IB 15 Nigeria Ibadan 3.94704 7.37754 TRUE 1999-12-14 2000-12-14 FALSE FALSE 1 cassava IITA-TMS-IBA990930 NA 1153686 2.22 5400 NA roots 5400 NA NA NA NA NA NA 0.57
doi_10.25502_ESBZ-5S84 99pyt142IB 16 Nigeria Ibadan 3.94704 7.37754 TRUE 1999-12-14 2000-12-14 FALSE FALSE 1 cassava IITA-TMS-IBA990955 NA 1153711 2.31 5000 NA roots 5000 NA NA NA NA NA NA 0.67
doi_10.25502_ESBZ-5S84 99pyt142IB 17 Nigeria Ibadan 3.94704 7.37754 TRUE 1999-12-14 2000-12-14 FALSE FALSE 1 cassava IITA-TMS-IBA990979 NA 1153735 3.98 11000 NA roots 11000 NA NA NA NA NA NA 0.55
doi_10.25502_ESBZ-5S84 99pyt142IB 18 Nigeria Ibadan 3.94704 7.37754 TRUE 1999-12-14 2000-12-14 FALSE FALSE 1 cassava IITA-TMS-IBA990980 NA 1153736 5.42 13000 NA roots 13000 NA NA NA NA NA NA 0.50
doi_10.25502_ESBZ-5S84 99pyt142IB 19 Nigeria Ibadan 3.94704 7.37754 TRUE 1999-12-14 2000-12-14 FALSE FALSE 1 cassava IITA-TMS-IBA990983 NA 1153739 2.37 5000 NA roots 5000 NA NA NA NA NA NA 0.50
doi_10.25502_ESBZ-5S84 99pyt142IB 20 Nigeria Ibadan 3.94704 7.37754 TRUE 1999-12-14 2000-12-14 FALSE FALSE 1 cassava IITA-TMS-IBA990991 NA 1153747 2.73 6000 NA roots 6000 NA NA NA NA NA NA 0.38
doi_10.25502_ESBZ-5S84 99pyt142IB 21 Nigeria Ibadan 3.94704 7.37754 TRUE 1999-12-14 2000-12-14 FALSE FALSE 1 cassava IITA-TMS-IBA990999 NA 1153755 1.34 3400 NA roots 3400 NA NA NA NA NA NA 0.43
doi_10.25502_ESBZ-5S84 99pyt142IB 22 Nigeria Ibadan 3.94704 7.37754 TRUE 1999-12-14 2000-12-14 FALSE FALSE 1 cassava IITA-TMS-IBA991042 NA 1153874 1.69 4000 NA roots 4000 NA NA NA NA NA NA 0.45
doi_10.25502_ESBZ-5S84 99pyt142IB 23 Nigeria Ibadan 3.94704 7.37754 TRUE 1999-12-14 2000-12-14 FALSE FALSE 1 cassava IITA-TMS-IBA991067 NA 1153899 NA 3400 NA roots 3400 NA NA NA NA NA NA 0.63
doi_10.25502_ESBZ-5S84 99pyt142IB 24 Nigeria Ibadan 3.94704 7.37754 TRUE 1999-12-14 2000-12-14 FALSE FALSE 1 cassava IITA-TMS-IBA991067 NA 1153899 3.72 9400 NA roots 9400 NA NA NA NA NA NA 0.55
doi_10.25502_ESBZ-5S84 99pyt142IB 25 Nigeria Ibadan 3.94704 7.37754 TRUE 1999-12-14 2000-12-14 FALSE FALSE 1 cassava IITA-TMS-IBA991166 NA 1153998 1.44 4000 NA roots 4000 NA NA NA NA NA NA 0.57


The dataset has 142 treatments:

treatments
variety
IITA-TMS-IBA30572
IITA-TMS-IBA9102324
IITA-TMS-IBA920326
IITA-TMS-IBA990799
IITA-TMS-IBA990803
IITA-TMS-IBA990806
IITA-TMS-IBA990837
IITA-TMS-IBA990841
IITA-TMS-IBA990869
IITA-TMS-IBA990895
IITA-TMS-IBA990909
IITA-TMS-IBA990911
IITA-TMS-IBA990913
IITA-TMS-IBA990925
IITA-TMS-IBA990926
IITA-TMS-IBA990930
IITA-TMS-IBA990955
IITA-TMS-IBA990979
IITA-TMS-IBA990980
IITA-TMS-IBA990983
IITA-TMS-IBA990991
IITA-TMS-IBA990999
IITA-TMS-IBA991042
IITA-TMS-IBA991067
IITA-TMS-IBA991166
IITA-TMS-IBA991182
IITA-TMS-IBA991186
IITA-TMS-IBA991190
IITA-TMS-IBA991193
IITA-TMS-IBA991195
IITA-TMS-IBA991198
IITA-TMS-IBA991233
IITA-TMS-IBA991250
IITA-TMS-IBA991271
IITA-TMS-IBA991305
IITA-TMS-IBA991316
IITA-TMS-IBA991376
IITA-TMS-IBA991378
IITA-TMS-IBA991411
IITA-TMS-IBA991420
IITA-TMS-IBA991421
IITA-TMS-IBA991427
IITA-TMS-IBA991428
IITA-TMS-IBA991439
IITA-TMS-IBA991458
IITA-TMS-IBA991459
IITA-TMS-IBA991463
IITA-TMS-IBA991472
IITA-TMS-IBA991475
IITA-TMS-IBA991496
IITA-TMS-IBA991513
IITA-TMS-IBA991515
IITA-TMS-IBA991530
IITA-TMS-IBA991533
IITA-TMS-IBA991543
IITA-TMS-IBA991544
IITA-TMS-IBA991547
IITA-TMS-IBA991561
IITA-TMS-IBA991576
IITA-TMS-IBA991577
IITA-TMS-IBA991578
IITA-TMS-IBA991579
IITA-TMS-IBA991590
IITA-TMS-IBA991625
IITA-TMS-IBA991674
IITA-TMS-IBA991680
IITA-TMS-IBA991700
IITA-TMS-IBA991702
IITA-TMS-IBA991718
IITA-TMS-IBA991719
IITA-TMS-IBA991721
IITA-TMS-IBA991731
IITA-TMS-IBA991734
IITA-TMS-IBA991738
IITA-TMS-IBA991755
IITA-TMS-IBA991756
IITA-TMS-IBA991768
IITA-TMS-IBA991799
IITA-TMS-IBA991801
IITA-TMS-IBA991804
IITA-TMS-IBA991816
IITA-TMS-IBA991849
IITA-TMS-IBA991853
IITA-TMS-IBA991856
IITA-TMS-IBA991882
IITA-TMS-IBA991884
IITA-TMS-IBA991885
IITA-TMS-IBA991887
IITA-TMS-IBA991890
IITA-TMS-IBA991891
IITA-TMS-IBA991892
IITA-TMS-IBA991894
IITA-TMS-IBA991902
IITA-TMS-IBA991903
IITA-TMS-IBA991906A
IITA-TMS-IBA991911
IITA-TMS-IBA991917
IITA-TMS-IBA991953
IITA-TMS-IBA991962
IITA-TMS-IBA991965
IITA-TMS-IBA991968
IITA-TMS-IBA991969
IITA-TMS-IBA991971
IITA-TMS-IBA991994
IITA-TMS-IBA991996
IITA-TMS-IBA992013
IITA-TMS-IBA992020
IITA-TMS-IBA992024
IITA-TMS-IBA992028
IITA-TMS-IBA992029
IITA-TMS-IBA992062
IITA-TMS-IBA992066
IITA-TMS-IBA992069
IITA-TMS-IBA992077
IITA-TMS-IBA992079
IITA-TMS-IBA992082
IITA-TMS-IBA992083
IITA-TMS-IBA992086
IITA-TMS-IBA992123
IITA-TMS-IBA992124
IITA-TMS-IBA992187
IITA-TMS-IBA992193
IITA-TMS-IBA992207
IITA-TMS-IBA992212
IITA-TMS-IBA992226
IITA-TMS-IBA992231
IITA-TMS-IBA992239
IITA-TMS-IBA992270
IITA-TMS-IBA992272
IITA-TMS-IBA992276
IITA-TMS-IBA992303
IITA-TMS-IBA992309
IITA-TMS-IBA992332
IITA-TMS-IBA992380
IITA-TMS-IBA992386
IITA-TMS-IBA993367A
IITA-TMS-IBA993376
IITA-TMS-IBA993381
IITA-TMS-IBA993382
IITA-TMS-IBA993388
IITA-TMS-IBA993448
TMEB117

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_ESBZ-5S
277(100.0%)
 0 (0.0%)
trial_id [character] 1. 99pyt142IB
277(100.0%)
 0 (0.0%)
record_id [integer]
Mean (sd) : 139 (80.1)
min ≤ med ≤ max:
1 ≤ 139 ≤ 277
IQR (CV) : 138 (0.6)
 277 distinct values (Integer sequence) 0 (0.0%)
country [character] 1. Nigeria
277(100.0%)
 0 (0.0%)
location [character] 1. Ibadan
277(100.0%)
 0 (0.0%)
geo_from_source [logical] 1. TRUE
277(100.0%)
 0 (0.0%)
planting_date [character] 1. 1999-12-14
277(100.0%)
 0 (0.0%)
harvest_date [character] 1. 2000-12-14
277(100.0%)
 0 (0.0%)
on_farm [logical] 1. FALSE
277(100.0%)
 0 (0.0%)
is_survey [logical] 1. FALSE
277(100.0%)
 0 (0.0%)
rep [integer]
Min : 1
Mean : 1.5
Max : 2
1:142(51.3%)
2:135(48.7%)
 0 (0.0%)
crop [character] 1. cassava
277(100.0%)
 0 (0.0%)
variety [character]
1. IITA-TMS-IBA991067
2. IITA-TMS-IBA30572
3. IITA-TMS-IBA9102324
4. IITA-TMS-IBA920326
5. IITA-TMS-IBA990799
6. IITA-TMS-IBA990803
7. IITA-TMS-IBA990837
8. IITA-TMS-IBA990869
9. IITA-TMS-IBA990909
10. IITA-TMS-IBA990911
[ 132 others ]
3(1.1%)
2(0.7%)
2(0.7%)
2(0.7%)
2(0.7%)
2(0.7%)
2(0.7%)
2(0.7%)
2(0.7%)
2(0.7%)
256(92.4%)
 0 (0.0%)
variety_alt [logical]
All NA's
 277 (100.0%)
variety_code [integer]
Mean (sd) : 1069828 (293506.9)
min ≤ med ≤ max:
5 ≤ 1154527 ≤ 1156255
IQR (CV) : 798 (0.3)
 142 distinct values 0 (0.0%)
dmy_storage [numeric]
Mean (sd) : 2.1 (1.2)
min ≤ med ≤ max:
0.1 ≤ 1.9 ≤ 5.4
IQR (CV) : 1.8 (0.6)
 200 distinct values 14 (5.1%)
fwy_storage [integer]
Mean (sd) : 5276.9 (3276.6)
min ≤ med ≤ max:
100 ≤ 4800 ≤ 16000
IQR (CV) : 4400 (0.6)
 62 distinct values 0 (0.0%)
fwy_residue [logical]
All NA's
 277 (100.0%)
yield_part [character] 1. roots
277(100.0%)
 0 (0.0%)
yield [integer]
Mean (sd) : 5276.9 (3276.6)
min ≤ med ≤ max:
100 ≤ 4800 ≤ 16000
IQR (CV) : 4400 (0.6)
 62 distinct values 0 (0.0%)
N_fertilizer [logical]
All NA's
 277 (100.0%)
P_fertilizer [logical]
All NA's
 277 (100.0%)
K_fertilizer [logical]
All NA's
 277 (100.0%)
irrigated [logical]
All NA's
 277 (100.0%)
plot_length [logical]
All NA's
 277 (100.0%)
plot_width [logical]
All NA's
 277 (100.0%)
harvest_index [numeric]
Mean (sd) : 0.5 (0.1)
min ≤ med ≤ max:
0 ≤ 0.5 ≤ 0.8
IQR (CV) : 0.2 (0.3)
 49 distinct values 135 (48.7%)