This report describes standardized data for “TZ_TAMASA_APS_2016_Yield_MetaData”. These data were standardized on 2024-04-06 by Fredy Chimire with this R script. The original data have a CIMMYT license. Because of the restrictions of this license, you need to run the script yourself to get the standardized data.

This is the full citation of the data set:

Masuki, Kenneth (2019). TZ_TAMASA_APS_2016_Yield_MetaData. CIMMYT Research Data & Software Repository Network. Version 2.0. hdl:11529/10548220

The dataset has 1338 records and 23 variables for maize in Tanzania.


These are the first 25 records:

records
trial_id planting_date on_farm is_survey crop yield_part yield N_fertilizer P_fertilizer K_fertilizer irrigated country adm1 adm2 adm3 adm4 location longitude latitude geo_from_source elevation
1 2016 TRUE TRUE maize grain 2230.9830 NA NA NA NA Tanzania Northern Kilimanjaro Moshi Kahe Rau river 37.40313 -3.445026 TRUE 707.6377
2 2016 TRUE TRUE maize grain 2811.9639 NA NA NA NA Tanzania Northern Kilimanjaro Moshi Kahe Rau river 37.40313 -3.445026 TRUE 707.6377
3 2016 TRUE TRUE maize grain 2426.9693 NA NA NA NA Tanzania Northern Kilimanjaro Moshi Kahe Rau river 37.40313 -3.445026 TRUE 707.6377
4 2016 TRUE TRUE maize grain 2125.2857 NA NA NA NA Tanzania Southern Highlands Songwe Mbozi Itumpi Nsenga 32.99118 -8.840937 TRUE 1547.1094
5 2016 TRUE TRUE maize grain 3378.3750 NA NA NA NA Tanzania Southern Highlands Songwe Mbozi Itumpi Nsenga 32.99118 -8.840937 TRUE 1547.1094
6 2016 TRUE TRUE maize grain 2497.2948 NA NA NA NA Tanzania Southern Highlands Songwe Mbozi Itumpi Nsenga 32.99118 -8.840937 TRUE 1547.1094
7 2016 TRUE TRUE maize grain 4371.1826 NA NA NA NA Tanzania Southern Highlands Songwe Mbozi Itumpi Nsenga 32.99118 -8.840937 TRUE 1547.1094
8 2016 TRUE TRUE maize grain 2971.8585 NA NA NA NA Tanzania Northern Kilimanjaro Siha Songu Ngumbaro 37.08696 -3.235418 TRUE 1148.6827
9 2016 TRUE TRUE maize grain 2887.5600 NA NA NA NA Tanzania Northern Kilimanjaro Siha Songu Ngumbaro 37.08696 -3.235418 TRUE 1148.6827
10 2016 TRUE TRUE maize grain 2673.4860 NA NA NA NA Tanzania Northern Kilimanjaro Siha Songu Ngumbaro 37.08696 -3.235418 TRUE 1148.6827
11 2016 TRUE TRUE maize grain 1030.4480 NA NA NA NA Tanzania Northern Kilimanjaro Moshi Kahe.mangaribi Ngasinyi b 37.45147 -3.481265 TRUE 700.9670
12 2016 TRUE TRUE maize grain 1845.3975 NA NA NA NA Tanzania Northern Kilimanjaro Moshi Kahe.mangaribi Ngasinyi b 37.45147 -3.481265 TRUE 700.9670
13 2016 TRUE TRUE maize grain 1418.0581 NA NA NA NA Tanzania Northern Kilimanjaro Moshi Kahe.mangaribi Ngasinyi b 37.45147 -3.481265 TRUE 700.9670
14 2016 TRUE TRUE maize grain 1837.3740 NA NA NA NA Tanzania Northern Manyara Babati Riroda Riroda 35.67941 -4.288049 TRUE 1350.7072
15 2016 TRUE TRUE maize grain 2943.9081 NA NA NA NA Tanzania Northern Manyara Babati Riroda Riroda 35.67941 -4.288049 TRUE 1350.7072
16 2016 TRUE TRUE maize grain 5367.4596 NA NA NA NA Tanzania Northern Manyara Babati Riroda Riroda 35.67941 -4.288049 TRUE 1350.7072
17 2016 TRUE TRUE maize grain 3294.8719 NA NA NA NA Tanzania Southern Highlands Njombe Ludewa Madilu Madilu 34.73102 -9.756617 TRUE 1787.4307
18 2016 TRUE TRUE maize grain 2879.7600 NA NA NA NA Tanzania Southern Highlands Njombe Ludewa Madilu Madilu 34.73102 -9.756617 TRUE 1787.4307
19 2016 TRUE TRUE maize grain 1643.2880 NA NA NA NA Tanzania Southern Highlands Njombe Ludewa Madilu Madilu 34.73102 -9.756617 TRUE 1787.4307
20 2016 TRUE TRUE maize grain 128.6031 NA NA NA NA Tanzania Southern Highlands Iringa Kilolo Lugalo Mazombe 35.98143 -7.686558 TRUE 1489.7107
21 2016 TRUE TRUE maize grain 233.8740 NA NA NA NA Tanzania Southern Highlands Iringa Kilolo Lugalo Mazombe 35.98143 -7.686558 TRUE 1489.7107
22 2016 TRUE TRUE maize grain 356.3780 NA NA NA NA Tanzania Southern Highlands Iringa Kilolo Lugalo Mazombe 35.98143 -7.686558 TRUE 1489.7107
23 2016 TRUE TRUE maize grain 5539.5474 NA NA NA NA Tanzania Southern Highlands Iringa Mufindi Ikweha Ukelemi 35.01536 -8.292122 TRUE 1627.3065
24 2016 TRUE TRUE maize grain 4254.7500 NA NA NA NA Tanzania Southern Highlands Iringa Mufindi Ikweha Ukelemi 35.01536 -8.292122 TRUE 1627.3065
25 2016 TRUE TRUE maize grain 3646.1250 NA NA NA NA Tanzania Southern Highlands Iringa Mufindi Ikweha Ukelemi 35.01536 -8.292122 TRUE 1627.3065


The observations were made at 456 locations. We have coordinates for 456 of these locations.


The standardization script emits the following non-compliance warnings.

type message
missing variables yield_moisture

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

variable completeness (%)
planting_date 100
harvest_date NA
crop 100
variety 0
N_fertilizer 0
P_fertilizer 0
K_fertilizer 0
irrigated 0
latitude 100
longitude 100
location 100
adm 100
yield 100


The data are further summarized in the table below.

Variable Stats / Values Freqs (% of Valid) Graph Missing
trial_id [integer]
Mean (sd) : 669.5 (386.4)
min ≤ med ≤ max:
1 ≤ 669.5 ≤ 1338
IQR (CV) : 668.5 (0.6)
 1338 distinct values (Integer sequence) 0 (0.0%)
planting_date [integer] 1 distinct value
2016:1338(100.0%)
 0 (0.0%)
on_farm [logical] 1. TRUE
1338(100.0%)
 0 (0.0%)
is_survey [logical] 1. TRUE
1338(100.0%)
 0 (0.0%)
crop [character] 1. maize
1338(100.0%)
 0 (0.0%)
yield_part [character] 1. grain
1338(100.0%)
 0 (0.0%)
yield [numeric]
Mean (sd) : 2427 (1792.2)
min ≤ med ≤ max:
60 ≤ 1979.2 ≤ 22881.9
IQR (CV) : 2202.6 (0.7)
 1337 distinct values 0 (0.0%)
N_fertilizer [logical]
All NA's
 1338 (100.0%)
P_fertilizer [logical]
All NA's
 1338 (100.0%)
K_fertilizer [logical]
All NA's
 1338 (100.0%)
irrigated [logical]
All NA's
 1338 (100.0%)
country [character] 1. Tanzania
1338(100.0%)
 0 (0.0%)
adm1 [character]
1. Northern
2. Southern Highlands
588(43.9%)
750(56.1%)
 0 (0.0%)
adm2 [character]
1. Arusha
2. Iringa
3. Kilimanjaro
4. Manyara
5. Mbeya
6. Njombe
7. Rukwa
8. Ruvuma
9. Songwe
180(13.5%)
178(13.3%)
187(14.0%)
221(16.5%)
66(4.9%)
186(13.9%)
96(7.2%)
124(9.3%)
100(7.5%)
 0 (0.0%)
adm3 [character]
1. Songea_Rural
2. Iringa_Rural
3. Monduli
4. Wangingombe
5. Ludewa
6. Mbeya_Rural
7. Mbozi
8. Mufindi
9. Hai
10. Hanang
[ 15 others ]
81(6.1%)
72(5.4%)
72(5.4%)
72(5.4%)
69(5.2%)
66(4.9%)
64(4.8%)
63(4.7%)
61(4.6%)
60(4.5%)
658(49.2%)
 0 (0.0%)
adm4 [character]
1. Sepeko
2. Maposeni
3. Ntuchi
4. Ulembwe
5. Laela
6. Madilu
7. Kahe
8. Magamba
9. Njoro
10. Chiwezi
[ 78 others ]
60(4.5%)
54(4.0%)
48(3.6%)
48(3.6%)
45(3.4%)
45(3.4%)
40(3.0%)
39(2.9%)
39(2.9%)
36(2.7%)
884(66.1%)
 0 (0.0%)
location [character]
1. Maposeni
2. Madilu
3. Ntuchi
4. Ndaleta
5. Kyuu
6. Mandepwende
7. Silaloda
8. Alkaria
9. Bumilayinga
10. Hidet
[ 110 others ]
54(4.0%)
45(3.4%)
45(3.4%)
39(2.9%)
29(2.2%)
27(2.0%)
25(1.9%)
24(1.8%)
24(1.8%)
24(1.8%)
1002(74.9%)
 0 (0.0%)
geo_from_source [logical] 1. TRUE
1338(100.0%)
 0 (0.0%)
elevation [numeric]
Mean (sd) : 1437.8 (362.7)
min ≤ med ≤ max:
689.8 ≤ 1437 ≤ 2079.1
IQR (CV) : 400.3 (0.3)
 456 distinct values 0 (0.0%)