Rwanda Biophysical Environment and Soil Health Problematic Rwanda - - PowerPoint PPT Presentation

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Jan 28, 2024 1.07k likes •1.29k views

Rwanda Biophysical Environment and Soil Health Problematic Rwanda Soil health Consortium (RSHC) By Rushemuka Pascal (From RAB) National Territory Spatial Organization Rwanda: Altitudinal Zones/major AEZs Highlands: >1900 m.

SLIDE 1

Rwanda Biophysical Environment and Soil Health Problematic

Rwanda Soil health Consortium (RSHC)

By Rushemuka Pascal (From RAB)

SLIDE 2

National Territory Spatial Organization

SLIDE 3

Rwanda: Altitudinal Zones/major AEZs

Highlands: >1900 m.
Midlands: 1600-1900
Low lands: 925-1600
These altidunal

elevation classes correspond to the limits of majors crops

SLIDE 4

Rwanda Spatial Organisation

Criteria

– Elevation – Climate

Rainfall
Temperature

– Parent material

SLIDE 5

Existing Soil RESOURCE INFORMATION

SLIDE 6

Rwanda soil map 1: 250,000: INEAC classification (1960-1981)

SLIDE 7

Soil Map of Rwanda 1:50,000: Soil Taxonomy (1980-1991, 2000-2002)

SLIDE 8

Farmers’ soil knowledge

SLIDE 9

Large scale aerial photos

Orthophoto: Elaborated from precise aerial

photos (5 x 5 m)

SLIDE 10

The need of developing site and soil-specific technologies: Thinking globally and act locally.

SLIDE 11

Soil health problems and possible solutions

SLIDE 12

Erosion and Erosion Control

Unprotected land

Bench Terraces Progressive Terraces

SLIDE 13

Erosion and Erosion Control

SLIDE 14

From unproductive to productive soils: the role of ISFM INPUTS

Unlimed soil: 0 lime + 0 FYM+ fertilizers Limed soil: lime + FYM+ fertilizers

SLIDE 15

Soil fertility management:Mother and Baby demonstration plots

SLIDE 16

Synthesis

AEZ Elevatio n (m) Relief Temperatu re (C°) Rainfa ll (mm) Dry season (mont h) Major limitatio n Major solutions Highlan ds > 1900, Mountaino us 15- 17 1250- 2000 1 to 2 Slope+++ Acidity+

Erosion control +Liming + manuring+ fertilizers

Midland s 1,600- 1,900 Dissected Plateau 17-20 1000- 1250 3 t0 4 Slope++ Acidity+

Erosion control + liming + manuring + fertilizers Lowlan ds < 1,600 Pediplain 20-21 700

1000

4 t0 5 Eratic rainfall+

Manuring + fertilizers

SLIDE 17

Concluding remarks

From a scientific point of view solutions for sustainable

development are known in each relavant scientific discipline)

The accessibility of this information so that efficient

investiment is achieved is the major problem.

Policy makers use very little existing scientific

information, at the same time researchers produce very little scientific information that is directely usable

This is the raison d’être/essence of the RSHC.