This report describes standardized data for “Drought Resistance of Maize in Gliricidia-Based Cropping Systems.”. These data were standardized on 2024-04-09 by Mitchelle Njukuya with this R script. The original data are available here. This is the full citation of the data set:

World Agroforestry Center (ICRAF); University of California (UC), Davis (2021). Drought Resistance of Maize in Gliricidia-Based Cropping Systems. Harvard Dataverse. Version 2.3. doi:10.7910/DVN/G4QLNP

You can also consult the accompanying paper.

The dataset has 180 records and 37 variables for 3 crops (gliricidia, maize, pigeon pea) in Tanzania.


These are the first 25 records:

records
dataset_id trial_id record_id country adm1 adm2 location longitude latitude elevation planting_date on_farm is_survey treatment rep crop variety intercrops yield_part yield fertilizer_type N_fertilizer N_splits P_fertilizer K_fertilizer OM_used OM_type OM_amount irrigated plant_density soil_pH soil_SOC soil_sand soil_clay soil_silt soil_P_available soil_CEC
doi_10.7910_DVN_G4QLNP 1 1 Tanzania Dodoma Kogwa Manyusi 36.296 -5.5656 1206 2017 TRUE FALSE maize;pigeon pea;gliricidia_DAP;urea 1 maize Staha pigeon pea;gliricidia grain 1370 DAP;urea 43 2 15 NA TRUE foliage 1600 FALSE 88889 5.083333 0.5666667 82.66667 12.66667 4.666667 10.19333 4.833333
doi_10.7910_DVN_G4QLNP 1 2 Tanzania Dodoma Kogwa Manyusi 36.296 -5.5656 1206 2017 TRUE FALSE maize;pigeon pea;gliricidia_none 1 maize Staha pigeon pea;gliricidia grain 420 none 0 NA 0 NA TRUE foliage 1600 FALSE 88889 5.083333 0.5666667 82.66667 12.66667 4.666667 10.19333 4.833333
doi_10.7910_DVN_G4QLNP 1 3 Tanzania Dodoma Kogwa Manyusi 36.296 -5.5656 1206 2017 TRUE FALSE maize;pigeon pea_DAP;urea 1 maize Staha pigeon pea grain 1350 DAP;urea 43 2 15 NA FALSE none 0 FALSE 88889 5.083333 0.5666667 82.66667 12.66667 4.666667 10.19333 4.833333
doi_10.7910_DVN_G4QLNP 1 4 Tanzania Dodoma Kogwa Manyusi 36.296 -5.5656 1206 2017 TRUE FALSE maize;pigeon pea_none 1 maize Staha pigeon pea grain 410 none 0 NA 0 NA FALSE none 0 FALSE 88889 5.083333 0.5666667 82.66667 12.66667 4.666667 10.19333 4.833333
doi_10.7910_DVN_G4QLNP 1 5 Tanzania Dodoma Kogwa Manyusi 36.296 -5.5656 1206 2017 TRUE FALSE maize;gliricidia_DAP;urea 1 maize Staha gliricidia grain 1060 DAP;urea 43 2 15 NA TRUE foliage 2700 FALSE 88889 5.083333 0.5666667 82.66667 12.66667 4.666667 10.19333 4.833333
doi_10.7910_DVN_G4QLNP 1 6 Tanzania Dodoma Kogwa Manyusi 36.296 -5.5656 1206 2017 TRUE FALSE maize;gliricidia_none 1 maize Staha gliricidia grain 1050 none 0 NA 0 NA TRUE foliage 2700 FALSE 88889 5.083333 0.5666667 82.66667 12.66667 4.666667 10.19333 4.833333
doi_10.7910_DVN_G4QLNP 1 7 Tanzania Dodoma Kogwa Manyusi 36.296 -5.5656 1206 2017 TRUE FALSE maize_DAP;urea 1 maize Staha none grain 1050 DAP;urea 43 2 15 NA FALSE none 0 FALSE 44444 5.083333 0.5666667 82.66667 12.66667 4.666667 10.19333 4.833333
doi_10.7910_DVN_G4QLNP 1 8 Tanzania Dodoma Kogwa Manyusi 36.296 -5.5656 1206 2017 TRUE FALSE maize_none 1 maize Staha none grain 1040 none 0 NA 0 NA FALSE none 0 FALSE 44444 5.083333 0.5666667 82.66667 12.66667 4.666667 10.19333 4.833333
doi_10.7910_DVN_G4QLNP 1 9 Tanzania Dodoma Kogwa Manyusi 36.296 -5.5656 1206 2017 TRUE FALSE maize;gliricidia_DAP;urea 2 maize Staha gliricidia grain 2340 DAP;urea 43 2 15 NA TRUE foliage 2700 FALSE 88889 5.083333 0.5666667 82.66667 12.66667 4.666667 10.19333 4.833333
doi_10.7910_DVN_G4QLNP 1 10 Tanzania Dodoma Kogwa Manyusi 36.296 -5.5656 1206 2017 TRUE FALSE maize;gliricidia_none 2 maize Staha gliricidia grain 2040 none 0 NA 0 NA TRUE foliage 2700 FALSE 88889 5.083333 0.5666667 82.66667 12.66667 4.666667 10.19333 4.833333
doi_10.7910_DVN_G4QLNP 1 11 Tanzania Dodoma Kogwa Manyusi 36.296 -5.5656 1206 2017 TRUE FALSE maize;pigeon pea_none 2 maize Staha pigeon pea grain 1380 none 0 NA 0 NA FALSE none 0 FALSE 88889 5.083333 0.5666667 82.66667 12.66667 4.666667 10.19333 4.833333
doi_10.7910_DVN_G4QLNP 1 12 Tanzania Dodoma Kogwa Manyusi 36.296 -5.5656 1206 2017 TRUE FALSE maize;pigeon pea_DAP;urea 2 maize Staha pigeon pea grain 1040 DAP;urea 43 2 15 NA FALSE none 0 FALSE 88889 5.083333 0.5666667 82.66667 12.66667 4.666667 10.19333 4.833333
doi_10.7910_DVN_G4QLNP 1 13 Tanzania Dodoma Kogwa Manyusi 36.296 -5.5656 1206 2017 TRUE FALSE maize;pigeon pea;gliricidia_none 2 maize Staha pigeon pea;gliricidia grain 1380 none 0 NA 0 NA TRUE foliage 1600 FALSE 88889 5.083333 0.5666667 82.66667 12.66667 4.666667 10.19333 4.833333
doi_10.7910_DVN_G4QLNP 1 14 Tanzania Dodoma Kogwa Manyusi 36.296 -5.5656 1206 2017 TRUE FALSE maize;pigeon pea;gliricidia_DAP;urea 2 maize Staha pigeon pea;gliricidia grain 0 DAP;urea 43 2 15 NA TRUE foliage 1600 FALSE 88889 5.083333 0.5666667 82.66667 12.66667 4.666667 10.19333 4.833333
doi_10.7910_DVN_G4QLNP 1 15 Tanzania Dodoma Kogwa Manyusi 36.296 -5.5656 1206 2017 TRUE FALSE maize_DAP;urea 2 maize Staha none grain 1710 DAP;urea 43 2 15 NA FALSE none 0 FALSE 44444 5.083333 0.5666667 82.66667 12.66667 4.666667 10.19333 4.833333
doi_10.7910_DVN_G4QLNP 1 16 Tanzania Dodoma Kogwa Manyusi 36.296 -5.5656 1206 2017 TRUE FALSE maize_none 2 maize Staha none grain 1710 none 0 NA 0 NA FALSE none 0 FALSE 44444 5.083333 0.5666667 82.66667 12.66667 4.666667 10.19333 4.833333
doi_10.7910_DVN_G4QLNP 1 17 Tanzania Dodoma Kogwa Manyusi 36.296 -5.5656 1206 2017 TRUE FALSE maize;gliricidia_DAP;urea 3 maize Staha gliricidia grain 2020 DAP;urea 43 2 15 NA TRUE foliage 2700 FALSE 88889 5.083333 0.5666667 82.66667 12.66667 4.666667 10.19333 4.833333
doi_10.7910_DVN_G4QLNP 1 18 Tanzania Dodoma Kogwa Manyusi 36.296 -5.5656 1206 2017 TRUE FALSE maize;gliricidia_none 3 maize Staha gliricidia grain 2020 none 0 NA 0 NA TRUE foliage 2700 FALSE 88889 5.083333 0.5666667 82.66667 12.66667 4.666667 10.19333 4.833333
doi_10.7910_DVN_G4QLNP 1 19 Tanzania Dodoma Kogwa Manyusi 36.296 -5.5656 1206 2017 TRUE FALSE maize;pigeon pea_DAP;urea 3 maize Staha pigeon pea grain 1380 DAP;urea 43 2 15 NA FALSE none 0 FALSE 88889 5.083333 0.5666667 82.66667 12.66667 4.666667 10.19333 4.833333
doi_10.7910_DVN_G4QLNP 1 20 Tanzania Dodoma Kogwa Manyusi 36.296 -5.5656 1206 2017 TRUE FALSE maize;pigeon pea_none 3 maize Staha pigeon pea grain 1370 none 0 NA 0 NA FALSE none 0 FALSE 88889 5.083333 0.5666667 82.66667 12.66667 4.666667 10.19333 4.833333
doi_10.7910_DVN_G4QLNP 1 21 Tanzania Dodoma Kogwa Manyusi 36.296 -5.5656 1206 2017 TRUE FALSE maize_none 3 maize Staha none grain 1720 none 0 NA 0 NA FALSE none 0 FALSE 44444 5.083333 0.5666667 82.66667 12.66667 4.666667 10.19333 4.833333
doi_10.7910_DVN_G4QLNP 1 22 Tanzania Dodoma Kogwa Manyusi 36.296 -5.5656 1206 2017 TRUE FALSE maize_DAP;urea 3 maize Staha none grain 1700 DAP;urea 43 2 15 NA FALSE none 0 FALSE 44444 5.083333 0.5666667 82.66667 12.66667 4.666667 10.19333 4.833333
doi_10.7910_DVN_G4QLNP 1 23 Tanzania Dodoma Kogwa Manyusi 36.296 -5.5656 1206 2017 TRUE FALSE maize;pigeon pea;gliricidia_DAP;urea 3 maize Staha pigeon pea;gliricidia grain 1360 DAP;urea 43 2 15 NA TRUE foliage 1600 FALSE 88889 5.083333 0.5666667 82.66667 12.66667 4.666667 10.19333 4.833333
doi_10.7910_DVN_G4QLNP 1 24 Tanzania Dodoma Kogwa Manyusi 36.296 -5.5656 1206 2017 TRUE FALSE maize;pigeon pea;gliricidia_none 3 maize Staha pigeon pea;gliricidia grain 1060 none 0 NA 0 NA TRUE foliage 1600 FALSE 88889 5.083333 0.5666667 82.66667 12.66667 4.666667 10.19333 4.833333
doi_10.7910_DVN_G4QLNP 1 25 Tanzania Dodoma Kogwa Manyusi 36.296 -5.5656 1206 2019 TRUE FALSE maize;pigeon pea;gliricidia_DAP;urea 1 maize Staha pigeon pea;gliricidia grain 3000 DAP;urea 43 2 15 NA TRUE foliage 1600 FALSE 88889 5.083333 0.5666667 82.66667 12.66667 4.666667 10.19333 4.833333


The dataset has 7 treatments:

treatments
intercrops
gliricidia
maize
maize;gliricidia
maize;pigeon pea
none
pigeon pea
pigeon pea;gliricidia

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_10.7910_DVN_G4QL
180(100.0%)
 0 (0.0%)
trial_id [integer] 1 distinct value
1:180(100.0%)
 0 (0.0%)
record_id [integer]
Mean (sd) : 90.5 (52.1)
min ≤ med ≤ max:
1 ≤ 90.5 ≤ 180
IQR (CV) : 89.5 (0.6)
 180 distinct values (Integer sequence) 0 (0.0%)
country [character] 1. Tanzania
180(100.0%)
 0 (0.0%)
adm1 [character] 1. Dodoma
180(100.0%)
 0 (0.0%)
adm2 [character] 1. Kogwa
180(100.0%)
 0 (0.0%)
location [character] 1. Manyusi
180(100.0%)
 0 (0.0%)
elevation [integer] 1 distinct value
1206:180(100.0%)
 0 (0.0%)
planting_date [integer]
Mean (sd) : 2018.7 (1.2)
min ≤ med ≤ max:
2017 ≤ 2019 ≤ 2020
IQR (CV) : 3 (0)
2017:54(30.0%)
2019:72(40.0%)
2020:54(30.0%)
 0 (0.0%)
on_farm [logical] 1. TRUE
180(100.0%)
 0 (0.0%)
is_survey [logical] 1. FALSE
180(100.0%)
 0 (0.0%)
treatment [character]
1. maize;gliricidia_DAP
2. maize;gliricidia_non
3. maize;pigeon pea;gli
4. maize;pigeon pea;gli
5. maize;pigeon pea_DAP
6. maize;pigeon pea_non
7. maize_DAP;urea
8. maize_none
9. pigeon pea_DAP;urea
10. pigeon pea_none
18(10.0%)
18(10.0%)
30(16.7%)
30(16.7%)
21(11.7%)
21(11.7%)
9(5.0%)
9(5.0%)
12(6.7%)
12(6.7%)
 0 (0.0%)
rep [integer]
Mean (sd) : 2 (0.8)
min ≤ med ≤ max:
1 ≤ 2 ≤ 3
IQR (CV) : 2 (0.4)
1:60(33.3%)
2:60(33.3%)
3:60(33.3%)
 0 (0.0%)
crop [character]
1. gliricidia
2. maize
3. pigeon pea
36(20.0%)
72(40.0%)
72(40.0%)
 0 (0.0%)
variety [character]
1. (Empty string)
2. ICEAP 0040
3. Staha
36(20.0%)
72(40.0%)
72(40.0%)
 0 (0.0%)
intercrops [character]
1. gliricidia
2. maize
3. maize;gliricidia
4. maize;pigeon pea
5. none
6. pigeon pea
7. pigeon pea;gliricidi
18(10.0%)
42(23.3%)
24(13.3%)
18(10.0%)
42(23.3%)
18(10.0%)
18(10.0%)
 0 (0.0%)
yield_part [character]
1. grain
2. seed
3. wood
72(40.0%)
54(30.0%)
54(30.0%)
 0 (0.0%)
yield [integer]
Mean (sd) : 1813.1 (1903)
min ≤ med ≤ max:
0 ≤ 1345 ≤ 10340
IQR (CV) : 1809.8 (1)
 137 distinct values 0 (0.0%)
fertilizer_type [character]
1. DAP;urea
2. none
90(50.0%)
90(50.0%)
 0 (0.0%)
N_fertilizer [integer]
Min : 0
Mean : 21.5
Max : 43
0:90(50.0%)
43:90(50.0%)
 0 (0.0%)
N_splits [integer] 1 distinct value
2:90(100.0%)
 90 (50.0%)
P_fertilizer [integer]
Min : 0
Mean : 7.5
Max : 15
0:90(50.0%)
15:90(50.0%)
 0 (0.0%)
K_fertilizer [logical]
All NA's
 180 (100.0%)
OM_used [logical]
1. FALSE
2. TRUE
84(46.7%)
96(53.3%)
 0 (0.0%)
OM_type [character]
1. foliage
2. none
96(53.3%)
84(46.7%)
 0 (0.0%)
OM_amount [integer]
Mean (sd) : 1073.3 (1079.7)
min ≤ med ≤ max:
0 ≤ 1600 ≤ 2700
IQR (CV) : 1600 (1)
0:84(46.7%)
1600:60(33.3%)
2700:36(20.0%)
 0 (0.0%)
irrigated [logical] 1. FALSE
180(100.0%)
 0 (0.0%)
plant_density [integer]
Min : 44444
Mean : 78518.5
Max : 88889
44444:42(23.3%)
88889:138(76.7%)
 0 (0.0%)
soil_pH [numeric] 1 distinct value
5.08 !:180(100.0%)
! rounded
 0 (0.0%)
soil_SOC [numeric] 1 distinct value
0.57 !:180(100.0%)
! rounded
 0 (0.0%)
soil_sand [numeric] 1 distinct value
82.67 !:180(100.0%)
! rounded
 0 (0.0%)
soil_clay [numeric] 1 distinct value
12.67 !:180(100.0%)
! rounded
 0 (0.0%)
soil_silt [numeric] 1 distinct value
4.67 !:180(100.0%)
! rounded
 0 (0.0%)
soil_P_available [numeric] 1 distinct value
10.19 !:180(100.0%)
! rounded
 0 (0.0%)
soil_CEC [numeric] 1 distinct value
4.83 !:180(100.0%)
! rounded
 0 (0.0%)