 |
| Titel |
Precision of farmer-based fertility ratings and soil organic carbon for crop production on a Ferralsol |
| VerfasserIn |
P. Musinguzi, P. Ebanyat, J. S. Tenywa, T. A. Basamba, M. M. Tenywa, D. Mubiru |
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| ISSN |
1869-9510
|
| Digitales Dokument |
URL |
| Erschienen |
In: Solid Earth ; 6, no. 3 ; Nr. 6, no. 3 (2015-09-17), S.1063-1073 |
| Datensatznummer |
250115513
|
| Publikation (Nr.) |
 copernicus.org/se-6-1063-2015.pdf |
|
|
|
|
|
| Zusammenfassung |
| Simple and affordable soil fertility ratings are
essential, particularly for the resource-constrained farmers in sub-Saharan
Africa (SSA), in planning and implementing prudent interventions. A study was
conducted on Ferralsols in Uganda to evaluate farmer-based soil
fertility assessment techniques, hereafter referred to as farmers' field
experiences (FFE), for ease of use and precision, against more formal
scientific quantitative ratings using soil organic carbon (SQR-SOC). A total
of 30 fields were investigated and rated using both techniques, as low,
medium and high in terms of soil fertility – with maize as the test crop.
Both soil fertility rating techniques were fairly precise in delineating
soil fertility classes, though the FFE was inefficient in distinguishing
fields > 1.2 % SOC with medium and high fertility. Soil organic
carbon, silt and clay were exceptionally influential, accounting for the
highest percentage in grain yield of 50 % in the topsoil (0–15 cm) and 67 %
for the mean concentrations from 0 to 15 and 15 to 30 cm. Each unit increase in
SOC concentration resulted in 966 to 1223 kg ha−1 yield gain. The FFE
technique was effective in identifying low-fertility fields, and this was
coherent with the fields categorized as low (SOC < 1.2 %). Beyond
this level, its precision can be remarkably increased when supplemented with
the SQR-SOC technique. |
| |
|
| Teil von |
|
|
|
|
|
|
|
|