Contextual data: Cameroon - Maize - All years

‹ 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 ›
Cameroon total 912,223 966,040 1,050,396 1,249,489 1,322,160 1,394,832 1,625,213 1,670,321 1,572,067 1,472,230
Adamaoua   130,256 137,941 129,456 160,660 161,759 162,977 186,320 176,831 167,132 167,641  
Centre   95,143 100,753 108,771 121,434 122,725 140,500 160,335 193,201 179,870 165,897  
East   45,339 48,015 70,115 79,821 82,330 86,584 100,824 90,772 86,324 82,532  
Far North   42,805 45,330 103,598 129,178 133,706 159,752 141,204 148,104 132,405 131,177  
Littoral   71,207 75,409 79,857 83,129 132,349 138,327 141,313 134,104 124,449 117,976  
North   137,458 145,567 99,910 167,492 172,538 173,938 208,164 210,729 191,553 198,548  
North-West   133,955 141,861 163,754 181,653 127,608 137,548 153,756 176,473 164,120 168,531  
South   23,642 25,037 46,952 48,170 73,742 73,815 79,029 68,555 65,881 59,165  
South-West   94,131 99,683 67,231 101,261 111,529 112,529 156,747 172,740 154,948 137,074  
West   138,287 146,444 180,752 176,691 203,874 208,862 297,521 298,812 305,385 243,689  

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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