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Small doses of fertilizer applied at the right place at the right time,
combined with an inventory credit system (warrantage), lead to
large benefits in yields and incomes in several countries
of sub-Saharan Africa
Fertilizer Microdosing
July 2012
A three-finger pinch of fertilizer is placed in
the seed hole.
The microdosed plot on the left gives much better yield than the
non-fertilized one on the right.
Improved sorghum varieties do better
than traditional ones, and more so when
microdosed. (Source: INERA, Burkina Faso.
2010. AGRA Microdosing Project Report)
Warrantage allows for storage of grain until prices are better.
Overview
Land degradation leads to estimated
losses of US$42 billion in income and
5 million hectares of productive land
in sub-Saharan Africa (SSA) each
year. Poor soil fertility, in particular low
phosphorus and organic matter, cause
low grain and biomass production.
A combination of strategic fertilizer
application and an inventory credit
system, called warrantage has helped
farmers obtain good grain yields,
improve their livelihoods and access
finance and markets.
The innovation
Microdosing involves the application of
small, affordable quantities of inorganic
fertilizer with the seed at planting time,
or as top dressing 3 to 4 weeks after
emergence.
Farmers apply 2 to 6 grams of fertilizer
(about a three-finger pinch) in or near
the seed hole at the time of planting
(equivalent to about 20 to 60 kg of
fertilizer per hectare).
Microdosing, adapted to
traditional water management
known as Zaï, where small
planting holes are dug early
in the season and filled with
manure, doubles crop yields.
Warrantage
Inventory credit or warrantage
allows farmers to store their
grain at harvest time for sale
when prices are better, and
take a loan against the stored
grain. After sale of the grain,
the farmers pay back loans
and buy inputs for the new
season.
The Impact
About 25,000 smallholder farmers in
Mali, Burkina Faso, and Niger have
learned the technique and increased
sorghum and millet yields by 44 to
120%. Their family incomes increased
by 50 to 130%.
Fertilizer use has been reintroduced
in Zimbabwe, Mozambique and
South Africa. Although microdosing
is time consuming and laborious,
its use in Zimbabwe resulted in
170,000 households increasing cereal
production levels by 40,000 tons,
saving US$7 million in food imports.
A regional project of the Alliance for a
Green Revolution in Africa (AGRA) is
targeting 360,000 households with the
microdosing technology by the end of
2012.
Researchers are looking at
packaging the correct dose of
fertilizer and exploring the use of
seed coating and an animal-drawn
mechanized planter as options in
collaboration with other institutions.
Partners
NARS, farmer organizations,
NGOs, FAO, local agricultural
centers, a network of international
donors, CORAF/WECARD, USAID,
AGRA.
2000
1500
1000
500
0
Control
Improved variety
Traditional variety
Official rate Microdose
Grainyield(kg/ha)
Treatment
Benefits generated from loans given through the
warrantage system in Mali.
NGOs managing
farmer groups
in Mali (2010)
Loans given
to farmers
(CFA)
Benefit
generated
(CFA)
ADAF Galle 850,000 365,000
EUCORD 10,082,000 4,536,900
KILABO 540,000 243,000
SG2000 14,072,395 3,685,261
Source: IER, Mali. 2010. AGRA Microdosing Project Annual Report.

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Fertilizer microdosing

  • 1. Small doses of fertilizer applied at the right place at the right time, combined with an inventory credit system (warrantage), lead to large benefits in yields and incomes in several countries of sub-Saharan Africa Fertilizer Microdosing July 2012 A three-finger pinch of fertilizer is placed in the seed hole. The microdosed plot on the left gives much better yield than the non-fertilized one on the right. Improved sorghum varieties do better than traditional ones, and more so when microdosed. (Source: INERA, Burkina Faso. 2010. AGRA Microdosing Project Report) Warrantage allows for storage of grain until prices are better. Overview Land degradation leads to estimated losses of US$42 billion in income and 5 million hectares of productive land in sub-Saharan Africa (SSA) each year. Poor soil fertility, in particular low phosphorus and organic matter, cause low grain and biomass production. A combination of strategic fertilizer application and an inventory credit system, called warrantage has helped farmers obtain good grain yields, improve their livelihoods and access finance and markets. The innovation Microdosing involves the application of small, affordable quantities of inorganic fertilizer with the seed at planting time, or as top dressing 3 to 4 weeks after emergence. Farmers apply 2 to 6 grams of fertilizer (about a three-finger pinch) in or near the seed hole at the time of planting (equivalent to about 20 to 60 kg of fertilizer per hectare). Microdosing, adapted to traditional water management known as Zaï, where small planting holes are dug early in the season and filled with manure, doubles crop yields. Warrantage Inventory credit or warrantage allows farmers to store their grain at harvest time for sale when prices are better, and take a loan against the stored grain. After sale of the grain, the farmers pay back loans and buy inputs for the new season. The Impact About 25,000 smallholder farmers in Mali, Burkina Faso, and Niger have learned the technique and increased sorghum and millet yields by 44 to 120%. Their family incomes increased by 50 to 130%. Fertilizer use has been reintroduced in Zimbabwe, Mozambique and South Africa. Although microdosing is time consuming and laborious, its use in Zimbabwe resulted in 170,000 households increasing cereal production levels by 40,000 tons, saving US$7 million in food imports. A regional project of the Alliance for a Green Revolution in Africa (AGRA) is targeting 360,000 households with the microdosing technology by the end of 2012. Researchers are looking at packaging the correct dose of fertilizer and exploring the use of seed coating and an animal-drawn mechanized planter as options in collaboration with other institutions. Partners NARS, farmer organizations, NGOs, FAO, local agricultural centers, a network of international donors, CORAF/WECARD, USAID, AGRA. 2000 1500 1000 500 0 Control Improved variety Traditional variety Official rate Microdose Grainyield(kg/ha) Treatment Benefits generated from loans given through the warrantage system in Mali. NGOs managing farmer groups in Mali (2010) Loans given to farmers (CFA) Benefit generated (CFA) ADAF Galle 850,000 365,000 EUCORD 10,082,000 4,536,900 KILABO 540,000 243,000 SG2000 14,072,395 3,685,261 Source: IER, Mali. 2010. AGRA Microdosing Project Annual Report.