Continuous fertilization on non-humiferous acid Oxisols in Rwanda" Plateau Central": Soil chemical changes and plant production
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Date
1998Author
Rutunga, V
Steiner, KG
Karanja, NK
Type
ArticleLanguage
enMetadata
Show full item recordAbstract
Crop rotation system of maize and beans, established at Rubona (Rwanda) from 1984 to 1992, was used to evaluate different
types and rates of fertilizers in improving the productivity of acid Oxisols. Continuous cropping of maize followed by beans
for a period of 8 years gave no yield in control plots.
A
single application of 2 t per ha of lime increased significantly (p
=
.01)
the soil pH, Ca
2+
content, cationic exchange capacity, and decreased the level of the exchangeable aluminium. This quantity
of lime when applied every two years for a period of eight years led to overliming. The application of more than 8
t per ha
of fresh farmyard manure (annually), combined to 300
kg per ha of NPK 17:17:17 (every six months) significantly improved
soil organic C and crop production at Rubona. The high rate (35
t per ha) of fresh manure or the combination of “lime, manure
and NPK fertilizers” gave the best crop performance.
T
en tons of farmyard manure (dry matter) per ha and per year seems to
be the minimum acceptable amount which can effectively substitute for inorganic fertilizers
URI
http://pressesagro.be/base/text/v2n2/135.pdfhttp://erepository.uonbi.ac.ke:8080/xmlui/handle/123456789/50881
Citation
Rutunga, V., Steiner, K. G., Karanja, N. K., Gachene, C. K., & Nzabonihankuye, G. (1998). Continuous fertilization on non-humiferous acid Oxisols in Rwanda" Plateau Central": Soil chemical changes and plant production. BIOTECHNOLOGIE AGRONOMIE SOCIETE ET ENVIRONMENT, 2, 135-142.Publisher
University of Nairobi, college of agriculture and veterinary services,