Current and residual effects of compost and inorganic fertilizer on wheat and soil chemical properties
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Nigus Demelash, Wondimu Bayu, Sitot Tesfaye, Feras M. Ziadat, Rolf Sommer. (1/9/2014). Current and residual effects of compost and inorganic fertilizer on wheat and soil chemical properties. Nutrient Cycling in Agroecosystems, 100, pp. 357-367.
Abstract
Restoring soil fertility in smallholder
farming systems is essential to sustain crop production.
An experiment was conducted in 2011 and 2012
to study the effect of compost and inorganic fertilizer
application on soil chemical properties and wheat
yield in northwest Ethiopia. Full factorial combinations
of four levels of compost (0, 4, 6, 8 t ha-1
) and
three levels of inorganic fertilizers (0–0, 17.3–5,
34.5–10 kg N–P ha-1
) were compared in a randomized
complete block design with three replications. In
2012, two sets of trials were conducted: one was the
repetition of the 2011 experiment on a new experimental
plot and the second was a residual effect study
conducted on the experimental plots of 2011. Results
showed that in the year of application, applying 6 t
compost ha-1 with 34.5–10 kg N–P ha-1 gave the
highest significant grain yield. In the residual effect
trial, 8 t compost ha-1 with 34.5–10 kg N–P ha-1
gave 271 % increase over the control. Grain protein
content increased 21 and 16 % in the current and
residual effect trials, respectively, when 8 t compost
ha-1 was applied; it increased 11 and 14 % in the
current and residual effect trials, respectively, when
34.5–10 kg N–P ha-1 was applied. Under the current
and residual effects of 8 t compost ha-1
, SOM
increased 108 and 104 %; available P 162 and
173 %; exchangeable Ca 16.7 and 17.4 %; and CEC
15.4 and 17.1 %, respectively. Applying 6 t compost
ha-1 with 34.5–10 kg N–P ha-1 is economically
profitable with 844 % MRR.
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Author(s) ORCID(s)
Sommer, Rolf https://orcid.org/0000-0001-7599-9056