| Journal Article |
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| Article Title | Conservation agriculture increases soil organic carbon and residual water content in upland crop production systems | | Author | Victor B. Ella, Manuel Reyes, Agustin Mercado, Jr., Adrian Ares and Rafael Padre | | Year | 2016 | | Journal Title | Eurasian Journal of Soil Science | | Institution | Federation of Eurasian Soil Science Societies | | Volume | 5 | | Issue | 1 | | Pages | 24-29 | | Call Number | JA0650-16 | | Keywords | Upland agriculture, soil quality, climate change adaptation, cropping systems |
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| Abstract: |
| Conservation agriculture involves minimum
soil disturbance, continuous ground cover, and
diversified crop rotations or mixtures. Conservation agriculture production systems (CAPS) have
the potential to improve soil quality if appropriate cropping systems are developed. In this
study, five CAPS in
cluding different cropping patterns and cover crops under two fertility levels,
and a plow
-
based system as control, were studied in a typical upland agricultural area in
northern Mindanao in the Philippines. Results showed that soil organic carbon (SOC) at
0
-
5
-
cm
depth for all CAPS treatments generally increased with time while SOC under the plow
-
based
system tended to decline over time for both the high (120, 60 and 60 kg N P K ha
-
1
) and moderate
(60
-
30
-
30 kg N P K ha
-
1
) fertility levels. The cropping sys
tem with maize + Stylosanthes
guianensis in the first year followed by
Stylosanthes guianensis
and fallow in the second year, and
the cassava + Stylosanthes guianensis exhibited the highest rate of SOC increase for high and
moderate fertility levels, respe
ctively. After one, two, and three cropping seasons, plots under
CAPS had significantly higher soil residual water content (RWC) than under plow
-
based systems.
Results of this study suggest that conservation agriculture has a positive impact on soil qualit
y,
while till systems negatively impact soil characteristics. |
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