Contextual data: Zimbabwe - Maize - All years

‹ 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 ›
Zimbabwe total 1,014,345 1,014,345 1,014,345 190,286 559,148 471,152 1,242,565 1,327,572 1,451,629 968,041
Bulawayo   - - - - - - - - - -  
Harare   - - - - - - - - - -  
Manicaland   128,877 128,877 128,877 18,000 130,000 108,697 168,936 118,658 159,885 157,655  
Mashonaland Central   198,150 198,150 198,150 18,000 130,000 113,279 174,691 223,516 296,722 155,383  
Mashonaland East   141,278 141,278 141,278 18,000 130,000 87,999 186,161 181,994 148,507 129,657  
Mashonaland West   254,661 254,661 254,661 16,950 20,000 84,814 246,556 336,855 451,089 245,989  
Masvingo   61,830 61,830 61,830 3,171 2,074 32,390 141,072 56,201 80,070 41,314  
Matebeleland North   44,167 44,167 44,167 94,994 15,000 8,540 51,821 73,311 79,807 38,447  
Matebeleland South   33,655 33,655 33,655 3,171 2,074 6,592 71,145 58,290 35,741 20,435  
Midlands   151,727 151,727 151,727 18,000 130,000 28,841 202,183 278,747 199,808 179,161  

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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