This report describes standardized data for “N2Africa demo - Nigeria, 2014”. These data were standardized on 2023-08-22 by Rachel Mukami 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:

Vanlauwe, Bernard; Samuel Adjei-Nsiah; Theresa Ampadu-Boakye; Esther Ronner; Fred Kanampiu; Ken Giller; Edward Baars; Joost van Heerwaarden; Endalkachew Woldemeskel; Peter Ebanyat; Frederick Baijukya; Jean-Marie Sanginga; Paul Woomer; Regis Chikowo; Lloyd Phiphira; Nkeki Kamai (2014). N2Africa demo - Nigeria, 2014. International Institute of Tropical Agriculture (IITA). Not versioned. doi:10.25502/91q9-f709

The dataset has 501 records and 33 variables for 3 crops (cowpea, groundnut, soybean) in Nigeria. The dataset has 2 treatment(s): inoculant, P_fertilizer.


These are the first 25 records:

records
trial_id planting_date harvest_date on_farm is_survey treatment crop variety fwy_residue yield_part yield fertilizer_type N_fertilizer P_fertilizer K_fertilizer OM_used OM_type OM_amount inoculated inoculant irrigated row_spacing plant_spacing country adm1 adm2 adm3 longitude latitude geo_from_source elevation
FB_DEMO_NG0162 2014-06-25 2014-11-22 TRUE TRUE (-i -p ) soybean Tgx 1955-4f 2600 seed 2100 SSP 0 30 0 FALSE NA TRUE 2009 NA 75 10 Nigeria Kaduna Kajuru Kasuwan Magani 7.7 10.4 FALSE 690
FB_DEMO_NG0164 2014-07-02 2014-12-12 TRUE TRUE (+i +p ) soybean Tgx 1904-6f 4300 seed 3900 SSP 0 30 0 FALSE NA TRUE 2009 NA 75 10 Nigeria Kaduna Kajuru Kasuwan Magani 7.7 10.4 FALSE 683
FB_DEMO_NG0165 2014-06-23 2014-11-10 TRUE TRUE (-i +p ) soybean Tgx 1904-6f 2600 seed 2200 SSP 0 30 0 FALSE NA TRUE 2009 NA 75 10 Nigeria Kaduna Kajuru Kasuwan Magani 7.7 10.4 FALSE 689
FB_DEMO_NG0155 2014-06-28 2014-11-17 TRUE TRUE (-i -p) tgx 1448-2e soybean Tgx 1448-2e 2400 seed 1900 SSP 0 30 0 FALSE NA TRUE 200g NA 75 10 Nigeria Kaduna Kajuru Rimau Per Kurmin Juwa 7.8 10.4 FALSE 682
FB_DEMO_NG0164 2014-07-02 2014-12-12 TRUE TRUE (-i +p ) soybean Tgx 1904-6f 3700 seed 3200 SSP 0 30 0 FALSE NA TRUE 2009 NA 75 10 Nigeria Kaduna Kajuru Kasuwan Magani 7.7 10.4 FALSE 683
FB_DEMO_NG0149 2014-06-25 2014-11-11 TRUE TRUE (+i -p ) soybean Tgx 1448-2e 3400 seed 2900 SSP 0 30 0 FALSE NA TRUE 200gm NA 75 10 Nigeria Kaduna Kajuru Dutsen-Gaiya 7.7 10.4 FALSE 708
FB_DEMO_NG0150 2014-07-25 2014-10-15 TRUE TRUE (+i +p ) soybean Tgx 1448-2e 4250 seed 3850 SSP 0 30 0 FALSE NA TRUE 200gm NA 75 10 Nigeria Kaduna Kajuru Dutsen-Gaiya 7.1 10.3 FALSE 703
FB_DEMO_NG0150 2014-07-25 2014-10-15 TRUE TRUE (+i -p ) soybean Tgx 1448-2e 3450 seed 3050 SSP 0 30 0 FALSE NA TRUE 200gm NA 75 10 Nigeria Kaduna Kajuru Dutsen-Gaiya 7.1 10.3 FALSE 703
FB_DEMO_NG0149 2014-06-25 2014-11-11 TRUE TRUE (-i -p) tgx 1448-2e soybean Tgx 1448-2e 2450 seed 1950 SSP 0 30 0 FALSE NA TRUE 200gm NA 75 10 Nigeria Kaduna Kajuru Dutsen-Gaiya 7.7 10.4 FALSE 708
FB_DEMO_NG0149 2014-06-25 2014-11-11 TRUE TRUE (-i +p ) soybean Tgx 1448-2e 3400 seed 3000 SSP 0 30 0 FALSE NA TRUE 200gm NA 75 10 Nigeria Kaduna Kajuru Dutsen-Gaiya 7.7 10.4 FALSE 708
FB_DEMO_NG0163 2014-06-24 2014-11-21 TRUE TRUE (+i +p ) soybean Tgx 1951-3f 4500 seed 4050 SSP 0 30 0 FALSE NA TRUE 2009 NA 75 10 Nigeria Kaduna Kajuru Kasuwan Magani 7.7 10.4 FALSE 675
FB_DEMO_NG0163 2014-06-24 2014-11-21 TRUE TRUE (+i -p ) soybean Tgx 1951-3f 2500 seed 2100 SSP 0 30 0 FALSE NA TRUE 2009 NA 75 10 Nigeria Kaduna Kajuru Kasuwan Magani 7.7 10.4 FALSE 675
FB_DEMO_NG0154 2014-06-26 2014-11-15 TRUE TRUE (-i +p ) soybean Tgx 1904-6f 1500 seed 1150 SSP 0 30 0 FALSE NA TRUE 200g 4 NA 75 10 Nigeria Kaduna Kajuru Rimau Per Rimau 7.8 10.4 FALSE NA
FB_DEMO_NG0156 2014-06-20 2014-11-03 TRUE TRUE (-i -p) tgx 1448-2e soybean Tgx 1904-6f 1700 seed 1250 SSP 0 30 0 FALSE NA TRUE 200g (4g) NA 75 10 Nigeria Kaduna Kajuru Rimau Per Ikuchi Dam 7.7 10.4 FALSE 665
FB_DEMO_NG0151 2014-06-24 2014-11-10 TRUE TRUE (+i +p ) soybean Tgx 1448-2e 3950 seed 3550 SSP 0 30 0 FALSE NA TRUE 200gm NA 75 10 Nigeria Kaduna Kajuru Dutsen-Gaiya 7.7 10.4 FALSE 709
FB_DEMO_NG0150 2014-07-25 2014-10-15 TRUE TRUE (-i -p) tgx 1448-2e soybean Tgx 1448-2e 2420 seed 1920 SSP 0 30 0 FALSE NA TRUE 200gm NA 75 10 Nigeria Kaduna Kajuru Dutsen-Gaiya 7.1 10.3 FALSE 703
FB_DEMO_NG0156 2014-06-20 2014-11-03 TRUE TRUE (+i -p ) soybean Tgx 1904-6f 2500 seed 1900 SSP 0 30 0 FALSE NA TRUE 200g (4g) NA 75 10 Nigeria Kaduna Kajuru Rimau Per Ikuchi Dam 7.7 10.4 FALSE 665
FB_DEMO_NG0162 2014-06-25 2014-11-22 TRUE TRUE (-i +p ) soybean Tgx 1955-4f 5000 seed 4600 SSP 0 30 0 FALSE NA TRUE 2009 NA 75 10 Nigeria Kaduna Kajuru Kasuwan Magani 7.7 10.4 FALSE 690
FB_DEMO_NG0156 2014-06-20 2014-11-03 TRUE TRUE (-i +p ) soybean Tgx 1904-6f 1300 seed 750 SSP 0 30 0 FALSE NA TRUE 200g (4g) NA 75 10 Nigeria Kaduna Kajuru Rimau Per Ikuchi Dam 7.7 10.4 FALSE 665
FB_DEMO_NG0156 2014-06-20 2014-11-03 TRUE TRUE (+i +p ) soybean Tgx 1904-6f 2400 seed 1800 SSP 0 30 0 FALSE NA TRUE 200g (4g) NA 75 10 Nigeria Kaduna Kajuru Rimau Per Ikuchi Dam 7.7 10.4 FALSE 665
FB_DEMO_NG0155 2014-06-28 2014-11-17 TRUE TRUE (-i +p ) soybean Tgx 1448-2e 2300 seed 1800 SSP 0 30 0 FALSE NA TRUE 200g NA 75 10 Nigeria Kaduna Kajuru Rimau Per Kurmin Juwa 7.8 10.4 FALSE 682
FB_DEMO_NG0165 2014-06-23 2014-11-10 TRUE TRUE (+i -p ) soybean Tgx 1904-6f 2000 seed 1700 SSP 0 30 0 FALSE NA TRUE 2009 NA 75 10 Nigeria Kaduna Kajuru Kasuwan Magani 7.7 10.4 FALSE 689
FB_DEMO_NG0162 2014-06-25 2014-11-22 TRUE TRUE (+i -p ) soybean Tgx 1955-4f 2400 seed 2000 SSP 0 30 0 FALSE NA TRUE 2009 NA 75 10 Nigeria Kaduna Kajuru Kasuwan Magani 7.7 10.4 FALSE 690
FB_DEMO_NG0155 2014-06-28 2014-11-17 TRUE TRUE (+i +p ) soybean Tgx 1448-2e 2700 seed 2250 SSP 0 30 0 FALSE NA TRUE 200g NA 75 10 Nigeria Kaduna Kajuru Rimau Per Kurmin Juwa 7.8 10.4 FALSE 682
FB_DEMO_NG0166 2014-06-25 2014-11-11 TRUE TRUE (+i +p ) soybean Tgx 1448-2e 4600 seed 4000 SSP 0 30 0 FALSE NA TRUE 200gm NA 75 10 Nigeria Kaduna Kajuru Dutsen-Gaiya 7.7 10.4 FALSE 708


The observations were made at 78 locations. We have coordinates for 40 of these locations.


The standardization script emits the following non-compliance warnings.

type message
coordinates in wrong country Cameroon/Nigeria, Chad/Nigeria

The overall quality of the dataset, given the completeness of required variables was 6.8 on a scale of 10. See the table below

variable completeness (%)
planting_date 100.0
harvest_date 87.2
crop 100.0
variety 100.0
N_fertilizer 100.0
P_fertilizer 100.0
K_fertilizer 100.0
irrigated 0.0
latitude 0.0
longitude 0.0
location 0.0
adm 100.0
yield 100.0


The data are further summarized in the table below.

Variable Stats / Values Freqs (% of Valid) Graph Missing
trial_id [character]
1. FB_DEMO_NG0058
2. FB_DEMO_NG0060
3. FB_DEMO_NG0062
4. FB_DEMO_NG0063
5. FB_DEMO_NG0068
6. FB_DEMO_NG0069
7. FB_DEMO_NG0072
8. FB_DEMO_NG0076
9. FB_DEMO_NG0077
10. FB_DEMO_NG0079
[ 100 others ]
8(1.6%)
8(1.6%)
8(1.6%)
8(1.6%)
8(1.6%)
8(1.6%)
8(1.6%)
8(1.6%)
8(1.6%)
8(1.6%)
421(84.0%)
 0 (0.0%)
planting_date [character]
1. 2014-07-04
2. 2014-06-27
3. 2014-07-05
4. 2014-06-19
5. 2014-07-03
6. 2014-06-20
7. 2014-06-26
8. 2014-06-28
9. 2014-06-24
10. 2014-07-01
[ 37 others ]
53(10.6%)
38(7.6%)
31(6.2%)
27(5.4%)
22(4.4%)
20(4.0%)
20(4.0%)
20(4.0%)
16(3.2%)
16(3.2%)
238(47.5%)
 0 (0.0%)
harvest_date [character]
1. (Empty string)
2. 2014-11-10
3. 2014-11-12
4. 2014-11-14
5. 2014-11-19
6. 2014-11-05
7. 2014-11-15
8. 2014-11-02
9. 2014-11-20
10. 2014-10-20
[ 31 others ]
64(12.8%)
28(5.6%)
28(5.6%)
28(5.6%)
28(5.6%)
23(4.6%)
21(4.2%)
20(4.0%)
20(4.0%)
18(3.6%)
223(44.5%)
 0 (0.0%)
on_farm [logical] 1. TRUE
501(100.0%)
 0 (0.0%)
is_survey [logical] 1. TRUE
501(100.0%)
 0 (0.0%)
treatment [character]
1. + i - p
2. - i + p
3. v1 + p samnut 22
4. (-i +p )
5. (+i -p )
6. (+i +p )
7. v1 + i - p
8. v1 - i + p
9. - i - p
10. + i + p tgx 1904-6f
[ 121 others ]
25(5.0%)
23(4.6%)
18(3.6%)
17(3.4%)
17(3.4%)
17(3.4%)
16(3.2%)
15(3.0%)
13(2.6%)
13(2.6%)
327(65.3%)
 0 (0.0%)
crop [character]
1. cowpea
2. groundnut
3. soybean
15(3.0%)
68(13.6%)
418(83.4%)
 0 (0.0%)
variety [character]
1. Tgx 1448-2e
2. Tgx 1904-6f
3. Tgx 1448
4. Samnut 22
5. Tgx 1904
6. Evdt 2009
7. Tgx 1951-3f
8. Tgx 1951
9. Samnut 23
10. Sam 22
[ 5 others ]
148(29.5%)
124(24.8%)
73(14.6%)
52(10.4%)
48(9.6%)
12(2.4%)
12(2.4%)
9(1.8%)
6(1.2%)
4(0.8%)
13(2.6%)
 0 (0.0%)
fwy_residue [integer]
Mean (sd) : 3639.3 (2397.4)
min ≤ med ≤ max:
500 ≤ 3420 ≤ 35510
IQR (CV) : 2500 (0.7)
 198 distinct values 0 (0.0%)
yield_part [character] 1. seed
501(100.0%)
 0 (0.0%)
yield [integer]
Mean (sd) : 1660.6 (1187.9)
min ≤ med ≤ max:
200 ≤ 1400 ≤ 7900
IQR (CV) : 1000 (0.7)
 160 distinct values 0 (0.0%)
fertilizer_type [character]
1. (Empty string)
2. NPK
3. SSP
4. unknown
20(4.0%)
11(2.2%)
463(92.4%)
7(1.4%)
 0 (0.0%)
N_fertilizer [integer] 1 distinct value
0:501(100.0%)
 0 (0.0%)
P_fertilizer [integer]
Min : 0
Mean : 27.7
Max : 30
0:38(7.6%)
30:463(92.4%)
 0 (0.0%)
K_fertilizer [integer] 1 distinct value
0:501(100.0%)
 0 (0.0%)
OM_used [logical]
1. FALSE
2. TRUE
452(90.2%)
49(9.8%)
 0 (0.0%)
OM_type [character]
1. (Empty string)
2. compost
3. farmyard manure
452(90.2%)
32(6.4%)
17(3.4%)
 0 (0.0%)
OM_amount [integer]
Mean (sd) : 500 (1118)
min ≤ med ≤ max:
0 ≤ 0 ≤ 3000
IQR (CV) : 0 (2.2)
0:24(82.8%)
2500:1(3.4%)
3000:4(13.8%)
 472 (94.2%)
inoculated [logical]
1. FALSE
2. TRUE
83(16.6%)
418(83.4%)
 0 (0.0%)
inoculant [character]
1. Legume Fix
2. Rhizobium Legume Fix
3. (Empty string)
4. Rhizobial Legume Fix
5. Rhizobium Legumes Fi
6. 200gm
7. 2009
8. 200g 4
9. Rhizobium Inoculant
10. 200g
[ 5 others ]
146(29.1%)
118(23.6%)
83(16.6%)
48(9.6%)
32(6.4%)
20(4.0%)
16(3.2%)
8(1.6%)
7(1.4%)
4(0.8%)
19(3.8%)
 0 (0.0%)
irrigated [logical]
All NA's
 501 (100.0%)
row_spacing [integer] 1 distinct value
75:501(100.0%)
 0 (0.0%)
plant_spacing [integer]
Min : 10
Mean : 11.7
Max : 20
10:418(83.4%)
20:83(16.6%)
 0 (0.0%)
country [character] 1. Nigeria
501(100.0%)
 0 (0.0%)
adm1 [character]
1. Kaduna
2. Kano
3. Niger
260(51.9%)
157(31.3%)
84(16.8%)
 0 (0.0%)
adm2 [character]
1. Bichi
2. Bunkure
3. Doguwa
4. Igabi
5. Kajuru
6. Lere
7. Paikoro
8. Shiroro
9. Soba
10. Tundun Wada
11. ZangonKa
18(3.6%)
37(7.4%)
48(9.6%)
4(0.8%)
52(10.4%)
130(25.9%)
64(12.8%)
20(4.0%)
58(11.6%)
54(10.8%)
16(3.2%)
 0 (0.0%)
adm3 [character]
1. Sabon Birni
2. Ugwan Kimba
3. Dutsen-Gaiya
4. Tudun Saibu
5. Saminaka B
6. Kasuwan Magani
7. Lupma
8. Saminaka
9. Saminaks B
10. Korokpam
[ 54 others ]
39(7.8%)
23(4.6%)
20(4.0%)
19(3.8%)
17(3.4%)
16(3.2%)
16(3.2%)
16(3.2%)
16(3.2%)
12(2.4%)
307(61.3%)
 0 (0.0%)
geo_from_source [logical] 1. FALSE
501(100.0%)
 0 (0.0%)
elevation [integer]
Mean (sd) : 1162.2 (727.9)
min ≤ med ≤ max:
3 ≤ 815 ≤ 2543
IQR (CV) : 995 (0.6)
 80 distinct values 74 (14.8%)