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livestock production, further increasing environmental degradation. Reversing the soil fertility
declining trend and improving the livelihoods, food security, and income of the farmers will
require increased adoption of soil fertility enhancing strategies together with the introduction of
viable incentives to encourage farmers to address the issue of soil fertility decline.
High fertilizer prices, high rates of rural poverty, underdeveloped farm input and commodity
markets and an ageing farming community continue to exacerbate the declining trend in soil
fertility. According to results of a national soil fertility survey of 2014, over 50% of all sampled
soils in the country had below critical levels of soil pH, soil organic carbon, nitrogen,
phosphorus, potassium, zinc and copper (MoALF, 2014). Thus the originally fertile lands that
yielded 4 to 6 t per ha of maize have been degraded with cereal crop yields of less than 1 t per ha
becoming common (MoALF, 2014). Soil management strategies that restore and increase the soil
nutrient status, improve the physical, chemical and biological properties of the soil, are needed to
reverse the disastrous trend and cushion the future viability of the Kenyan food systems.
2.2.2. Soil fertility replenishment
The current use of an average of 10 kg per ha of fertilizer by Kenyan farmers leads to high
nutrient mining and hence the need for soil nutrient replenishment. This replenishment can be
done through the addition of inorganic and organic fertilizer. However a more sustainable
approach is through integrated soil fertility management (ISFM).
2.2.2.1. Inorganic fertilizers
Kenya Vision 2030 aims at transforming the agricultural sector to be an innovative,
commercially oriented and modern sector by increasing productivity through provision of widely
accessible inputs particularly fertilizer and certified seeds. The vision identifies the cost of
fertilizer as one of the constraints of high crop productivity. This problem was also highlighted
during the recently held KeFERT Round Table Conference held at KICC in October 2018.
Cumbersome acquisition processes, late delivery and adulteration were also mentioned as some
of the other Constraints facing fertilizer subsidy programme. Due to its cost, fertilizer use has
remained low estimated at 31 kg per ha compared to the recommended 125 kg per ha. In addition
to the cost, other factors contributing to low fertilizer usage include negative perceptions by
farmers, low value-cost ratios (VCRs) of fertilizers, high poverty levels and inadequate
knowledge. Due to the crucial role of fertilizers in enhancing land productivity, the government
has addressed it in various documents. The vision 2030 proposes a three tier reduction strategy to
be implemented through bulk procurement, local blending and manufacturing. The three tier cost
reduction strategies is one of the flagship projects of the vision 2030.
Despite the beneficial effects of inorganic fertilizers, continued use of acidifying fertilizers such
as Diammonium Phosphate (DAP) has led to increased soil acidity of most soils in Kenya
especially in the maize growing areas. Yet this type of fertilizer is among the top 3 fertilizers
imported in Kenya. (Fertilizer Statistics Overview KENYA 2012 -2015) To enhance efficient
use of fertilizers by farmers, there is need for farmers to be trained on the right fertilizer types
and application rates depending on the crop and the soil types. Emphasis should be laid on soil
analysis to inform on the soil fertility status for corrective nutrient replenishment measures.