SANREM-CRSP Conservation Agriculture for Food Security in the Philippines
description
Transcript of SANREM-CRSP Conservation Agriculture for Food Security in the Philippines
SANREM-CRSP Conservation Agriculture for Food Security in the
PhilippinesInitial Results on Soil
Qualityby
Victor B. EllaProfessor, UPLB
Claveria, Misamis Oriental
January 18, 2011
Project Objective (S in GETS)
Assess soil quality and measure crop yield and biomass from CAPS, and compare them with soil quality and crop yield and biomass from conventional plow-based systems.
Project Site
Claveria, Misamis Oriental(Researcher-managed and
Farmer-managed sites)
Data Gathering
Researcher-managed Site, July 2010
Data Gathering
Farmer-managed Sites, July 2010
Laboratory Analysis
UPLB CEAT Soils and Hydraulic Lab and Soil Sci Lab, July to September 2010
Initial Results
Average Bulk Density at RM and FM Sites
Variation of Bulk Density with Depth at Researcher-Managed Site
0.960.98
11.021.041.061.08
1.11.121.141.16
0-5 5-15 15-30 30-45 45-60 60-90
Soil
Bulk
Den
sity
(g/
cc)
Soil Depth (cm)
Average Soil Bulk Density at RM Site
Average % Soil Organic Matter at RM and FM Sites
0.000.501.001.502.002.503.003.504.004.505.00
RM FM Upper FM Middle FM Lower
% O
M
Soil Organic Matter at RM and FM Sites
0-15
15-30
Variation of % Organic Matter with Depth
at Researcher-Managed Site
0.00
1.00
2.00
3.00
4.00
5.00
6.00
7.00
0-5 5-15 15-30 30-45 45-60
% O
M
Depth (cm)
Vertical Distribution of Soil Organic Matter at Lower RM
Average % Nitrogen at RM and FM Sites
0.00
0.05
0.10
0.15
0.20
0.25
RM FM Upper FM Middle FM Lower
% N
Soil Nitrogen at RM and FM Sites
0-15
15-30
Variation of % Soil Nitrogen with Depth
at Researcher-Managed Site
0.00
0.05
0.10
0.15
0.20
0.25
0.30
0-5 5-15 15-30 30-45 45-60 60-90
%N
Depth (cm)
Vertical Distribution of Nitrogen at Lower RM
Average Soil Phosphorus at RM and FM Sites
0.00
2.00
4.00
6.00
8.00
10.00
12.00
RM FM Upper FM Middle FM Lower
P Co
ncen
trati
on (
ppm
)
Soil Phosphorus at RM and FM Sites
0-15
15-30
Variation of Soil Phosphorus with Depth
at Researcher-Managed Site
0.00
1.00
2.00
3.00
4.00
5.00
6.00
0-5 5-15 15-30 30-45 45-60 60-90
P Co
ncen
trati
on (
ppm
)
Depth (cm)
Vertical Distribution of Phosphorus at Lower RM
Average Soil pH at RM and FM Sites
0.00
1.00
2.00
3.00
4.00
5.00
6.00
RM FM Upper FM Middle FM Lower
pH
Soil pH at RM and FM Sites
0-15
15-30
Variation of Soil pH with Depth at Researcher-Managed Site
4.3
4.4
4.5
4.6
4.7
4.8
4.9
5
0-5 5-15 15-30 30-45 45-60 60-90
pH
Depth (cm)
Vertical Distribution of Soil pH at Lower RM
Summary of Initial Findings
• The soil texture at the project site is generally clayey particularly for the middle and lower elevation zones. The soil in the upper elevation zone is generally coarser in texture than in the lower zones.
• The soil bulk density at the project site is generally low particularly for middle and lower elevation zones. Relatively higher soil bulk density was generally observed in the upper elevation zones. Moreover, the soil bulk density generally increases with soil depth at the researcher- managed site.
Summary of Initial Findings (cont’d.)
• Regardless of elevation and soil depth, the soil at the project site is generally acidic although soils in the lower and middle elevation zones are more acidic than those in the higher elevation zone. The soil pH generally increases with soil depth at the researcher-managed site indicating greater acidity near the ground surface
• The soil organic matter content is generally higher at the upper soil layers than at deeper layers regardless of site elevation.
Summary of Initial Findings (cont’d.)
• The soil Nitrogen and Phosphorus contents are also higher at the upper soil layers than at deeper layers
• The concentrations of potassium, sodium, calcium and magnesium in the soil exhibited no distinct pattern of variability with soil depth for all elevation zones
Thanks !!!