Matches in SemOpenAlex for { <https://semopenalex.org/work/W1969278424> ?p ?o ?g. }
Showing items 1 to 66 of
66
with 100 items per page.
- W1969278424 endingPage "17" @default.
- W1969278424 startingPage "3" @default.
- W1969278424 abstract "Fertile soils and ample water cycling sustain human life on the earth. The distribution of fertile soils, and hence the distribution of population, are related to the amount and quality of geological fertilization processes. The geological fertilizations are 1) transport and sedimentation of eroded soils by river water, 2) volcanic activities to supply fresh easily weatherable volcanic ashes. 3) formation and transport of aeolian dust, and 4) dynamic balance between soil erosion and soil formation. Major soils in tropical Asia are generally active and fertile. In addition to favorable soil distribution, Sawah based rice agriculture using lowland Inceptisols is common. In the sawah agriculture the 1st. geological fertilization process is strengthened artificially. Major soils of tropical Africa are non productive Oxisols. Aridisols and Psamments which occupy 65% of total area. Major soils for agricultural production are Alfisols and Ultisols, which are suffering either water shortage or nutrients depletion. If we consider the such soil characters. the effective population density of Africa become 150 persons/km2, which is a similar level of that of tropical Asia. The effective population density of tropical America was 50 persons/km2. Past twenty years agricultural productivities were doubled in tropical Asia, whereas. although the population density doubled, the agricultural productivities have been stagnated in tropical Africa. Soil degradations and desertifications are accelerating. Why has the green revolution not yet realized in Africa despite the successful experience in tropical Asia. The author hypothesizes that the key issue is general underdevelopment of lowland agriculture in tropical Africa. The “environment creative technology”, such as sawah farming is lacking in sub-Sahara Africa. Therefore irrigation was not efficient and thus development was slow, which made it difficult to use fertilizer efficiently, and accordingly high yielding varieties were useless. The sawah based farming is an intensive and sustainable system. Sustainable roductivity of 1 ha of sawah may be equivalent to more than 10 ha of upland field. If we can expand the sawah based farming in tropical Africa we will be able to alleviate present crises of environment and agriculture in tropical Africa. Therefore the cooperation between tropical Asia and tropical Africa will be important not only for sustainable development of agriculture but also for creating our new global societies." @default.
- W1969278424 created "2016-06-24" @default.
- W1969278424 creator A5042397272 @default.
- W1969278424 date "1994-01-01" @default.
- W1969278424 modified "2023-09-23" @default.
- W1969278424 title "Soils, People, and Sustainable Agriculture in Tropics. Potential of Sawah Based Agriculture in Tropical Africa." @default.
- W1969278424 cites W1990570439 @default.
- W1969278424 cites W2070420656 @default.
- W1969278424 cites W2076856068 @default.
- W1969278424 cites W234510214 @default.
- W1969278424 cites W3037574880 @default.
- W1969278424 doi "https://doi.org/10.3759/tropics.3.3" @default.
- W1969278424 hasPublicationYear "1994" @default.
- W1969278424 type Work @default.
- W1969278424 sameAs 1969278424 @default.
- W1969278424 citedByCount "3" @default.
- W1969278424 crossrefType "journal-article" @default.
- W1969278424 hasAuthorship W1969278424A5042397272 @default.
- W1969278424 hasBestOaLocation W19692784241 @default.
- W1969278424 hasConcept C118518473 @default.
- W1969278424 hasConcept C144024400 @default.
- W1969278424 hasConcept C149923435 @default.
- W1969278424 hasConcept C154108195 @default.
- W1969278424 hasConcept C159390177 @default.
- W1969278424 hasConcept C159750122 @default.
- W1969278424 hasConcept C18903297 @default.
- W1969278424 hasConcept C205649164 @default.
- W1969278424 hasConcept C2908647359 @default.
- W1969278424 hasConcept C39432304 @default.
- W1969278424 hasConcept C50660011 @default.
- W1969278424 hasConcept C54286561 @default.
- W1969278424 hasConcept C86803240 @default.
- W1969278424 hasConceptScore W1969278424C118518473 @default.
- W1969278424 hasConceptScore W1969278424C144024400 @default.
- W1969278424 hasConceptScore W1969278424C149923435 @default.
- W1969278424 hasConceptScore W1969278424C154108195 @default.
- W1969278424 hasConceptScore W1969278424C159390177 @default.
- W1969278424 hasConceptScore W1969278424C159750122 @default.
- W1969278424 hasConceptScore W1969278424C18903297 @default.
- W1969278424 hasConceptScore W1969278424C205649164 @default.
- W1969278424 hasConceptScore W1969278424C2908647359 @default.
- W1969278424 hasConceptScore W1969278424C39432304 @default.
- W1969278424 hasConceptScore W1969278424C50660011 @default.
- W1969278424 hasConceptScore W1969278424C54286561 @default.
- W1969278424 hasConceptScore W1969278424C86803240 @default.
- W1969278424 hasIssue "1" @default.
- W1969278424 hasLocation W19692784241 @default.
- W1969278424 hasOpenAccess W1969278424 @default.
- W1969278424 hasPrimaryLocation W19692784241 @default.
- W1969278424 hasRelatedWork W1512870830 @default.
- W1969278424 hasRelatedWork W1597608456 @default.
- W1969278424 hasRelatedWork W2087947847 @default.
- W1969278424 hasRelatedWork W2156403429 @default.
- W1969278424 hasRelatedWork W2257620215 @default.
- W1969278424 hasRelatedWork W2284900458 @default.
- W1969278424 hasRelatedWork W2801196826 @default.
- W1969278424 hasRelatedWork W2899084033 @default.
- W1969278424 hasRelatedWork W2940695858 @default.
- W1969278424 hasRelatedWork W3003442112 @default.
- W1969278424 hasVolume "3" @default.
- W1969278424 isParatext "false" @default.
- W1969278424 isRetracted "false" @default.
- W1969278424 magId "1969278424" @default.
- W1969278424 workType "article" @default.