Contextual data: Zimbabwe - Maize - All years

‹ 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022
Zimbabwe total 772,762 1,437,508 742,226 511,816 2,155,526 1,700,702 776,635 907,629 1,014,345 1,014,345
Bulawayo   - - - - - - - - - -  
Harare   - - - - - - - - - -  
Manicaland   138,454 176,294 89,384 71,774 267,369 211,105 51,070 65,867 128,877 128,877  
Mashonaland Central   157,050 245,516 190,117 110,316 455,666 359,877 159,184 182,938 198,150 198,150  
Mashonaland East   98,732 163,287 102,978 89,338 274,491 224,817 153,831 129,385 141,278 141,278  
Mashonaland West   175,002 340,114 215,827 143,573 543,622 461,463 228,073 309,984 254,661 254,661  
Masvingo   49,570 116,673 27,946 11,818 150,938 102,800 60,962 50,458 61,830 61,830  
Matebeleland North   36,204 78,764 23,532 15,155 67,759 46,142 13,031 20,002 44,167 44,167  
Matebeleland South   17,010 77,616 12,080 17,793 74,287 65,983 16,781 25,833 33,655 33,655  
Midlands   100,740 239,244 80,362 52,049 321,394 228,515 93,703 123,162 151,727 151,727  

Data version 2.19.3

Contextual data

Collected data

Values obtained from primary and secondary sources

Approximated data

Values approximated based on other data for same location

–No data

Not applicable or no data available

LGB Larger Grain Borer (Prostephanus truncatus) read more ›

Storage beetle pest of maize and dried cassava

Contextual data

Contextual factors relate to local conditions and practices that may affect losses on a seasonal or annual basis, such as weather, pest incidence, grain drying conditions and the length of household-level storage.

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APHLIS network and team members collect this data from official sources (e.g. ministries of agriculture and statistics offices), published research studies and national surveys etc, or by interviewing farmers, extension workers or other key informants. This data enables APHLIS to apply the relevant loss figures from the PHL profiles depending on seasonal circumstances, and convert percentage losses into absolute losses (in tonnes) using the production figures. Based on the postharvest loss profiles and contextual factors, APHLIS estimates postharvest losses at the provincial, national and regional levels.

The contextual dataset includes production quantities (t), whether it rained at harvest, the percentage of the crop marketed during first 3 months after harvest, household-level storage duration, and presence of specific pests (for example the larger grain borer, LGB, Prostephanus truncatus) which are used to contextualise the loss profile for each year. The importance of different types of contextual factors may vary between crops, and data for the most relevant contextual factors is shown and used in the loss estimate calculations.

For specific crop, location, year combinations where contextual data is not available, approximated data has been used. This is calculated based on the contextualised data which has been provided for the same location. Approximated contextual data is shown in grey. 

Read more about how APHLIS estimates losses ›

Contextual factors

Production quantity (t) the quantity of grain produced on small and large farms for each growing season.

Rain at harvest whether or not there is damp weather at time of harvest which would make drying the grain difficult. If there is rain at harvest then the value for the harvesting link in the PHL profile is increased.

% sold during first 3 months the proportion of grain that is marketed within the first three months, i.e. that will not enter farm storage for any significant time. This proportion of the production will not be subject to farm storage losses but instead will be affected by transport and market storage losses.

Household-level storage duration (months) the length of time that grain was stored at household-level. If household-level storage is less than 3 months then household-level storage loss is reduced to 0%, if 3 to 6 months it will be only 50% of the loss profile figure, or if 6 months or more than 100% of the household-level storage loss is applied.

LGB presence in the case of maize, whether or not LGB (the larger grain borer, Prostephanus truncatus) is expected to be a significant pest. If LGB is a serious pest in that particular season then storage losses are multiplied by 2.

Season

In locations where there is more than one growing season each year, seasonal production data for each of the growing seasons is inputted. These are labelled as first, second, third season.

Farm type

In locations where there are both smallholder farms and large-scale commercial farms, the contextual data is shown for each of these types.

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