|
|
|
|
| |
|
|
| Otim, Daniel; Smithers, Jeff; Senzanje, Aidan; van Antwerpen, Rianto; Thornton-Dibb, Sean LC. |
| Sugarcane in South Africa is grown on wide-ranging soils, sometimes in non-ideal climates and on steep topographies where soils are vulnerable to erosion. Sugarcane fields are protected against erosion through, inter alia, the use of engineered waterways, contour banks and spill-over roads. A comparison of design norms in the National Soil Conservation Manual and norms used in the sugar industry clearly shows discrepancies that need to be investigated. Furthermore, the sugar industry design nomograph was developed based on an unsustainable soil loss limit, does not include any regional variations of climate and the impact on soil erosion and runoff and does not include vulnerability during break cropping. The aim of this research was to develop and assess... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: ACRU; Design norm; Soil and water conservation; Soil loss; Sugarcane; South Africa. |
| Ano: 2021 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/6047 |
| |
|
| |
|
|
| Burger, Kees. |
| Following the example of Tiffen et al. on Machakos, Kenya, new macro-based evidence was collected in Machakos, the neighbouring Kitui district and in Benin, Cameroon and the Philippines, to assess the factors à la Boserup, inducing transitions towards sustainable land management, such as terracing, stone bands etc. We find that relative scarcity of land can be seen to induce technical changes, in the sense of Hayami & Ruttan, that correspond to the new relative scarcity, making higher man-land ratios the optimal choice. |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Soil and water conservation; Sustainable agriculture; Induced innovation; Boserup; Malthus; Land Economics/Use; Q12; Q21; Q28. |
| Ano: 2005 |
URL: http://purl.umn.edu/24517 |
| |
|
|
| Kabubo-Mariara, Jane; Linderhof, Vincent; Kruseman, Gideon. |
| This paper investigates the impact of tenure security and other factors on investment in soil and water conservation (SWC) in Kenya. Factor analysis, step-wise regression and reduced form model approaches are used to explain the willingness, likelihood and intensity of adoption of SWC investments. The results confirm the importance of tenure security and development domain dimensions in determining the likelihood and intensity of adoption and suggest that to ensure land tenure policy is pro-SWC/environment, it is important to consider whether household plots are owned, rented out or rented in. The impact of household assets implies a poverty environment link. Similar factors affect the decision whether or not to invest in SWC and also the level of... |
| Tipo: Journal Article |
Palavras-chave: Soil and water conservation; Tenure security; Development domains; Factor analysis; Land Economics/Use. |
| Ano: 2010 |
URL: http://purl.umn.edu/93863 |
| |
|
|
| Avanzi,Junior Cesar; Viola,Marcelo Ribeiro; Mello,Carlos Rogério de; Giongo,Marcos Vinicius; Pontes,Lucas Machado. |
| ABSTRACT The state of Tocantins is inserted in the new Brazilian agricultural frontier and has shown enormous potential for expansion of the agricultural lands. However, there is a lack of more elaborate scientific information for better planning and guide agricultural activities, especially regarding the soil and water conservation. Tocantins has a relevant rainfall spatial variability and, consequently, rainfall erosivity. Thus, this work aimed to develop models to estimate the mean monthly and annual rainfall and means rainfall erosivity factor (R-factor) of the Universal Soil Loss Equation (USLE) for the state of Tocantins. For that, 97 historical series of daily rainfall were studied, considering a standard period of 25 years (1985-2009). The fitting... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Water erosion; Geostatistics; Regression-kriging; Soil and water conservation; Mapping. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832019000100524 |
| |
|
| |
|
|
| Calegario,Arthur T.; Pereira,Luis F.; Pereira,Silvio B.; Silva,Laksme N. O. da; Araújo,Uriel L. de; Fernandes Filho,Elpídio I.. |
| ABSTRACT The current demand for food has been met through the exploitation of natural reserves. Brazil has 26% of its extension occupied by agricultural uses, 62% of which are pastures. Degraded pastures have greater land use intensity than well-managed pastures, leading to greater degradation of the environment. Land use classification systems consider that pastures are well managed, a misconception for the Brazilian reality. Based on this approach, it was aimed to develop a methodology for mapping the intensity of land use by pasture via remote sensing. The method of mapping was developed and validated in basins with different soil and climatic characteristics. Three calibrations were performed based on NDVI values to ascertain the influence on the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soil and water conservation; GIS; Kappa and weighted kappa indices. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662019000500352 |
| |
|
|
| Telles,Tiago S.; Righetto,Ana J.; Lourenço,Marco A. P.; Barbosa,Graziela M. C.. |
| ABSTRACT The no-tillage system participatory quality index aims to evaluate the quality and efficiency of soil management under no-tillage systems and consists of a weighted sum of eight indicators: intensity of crop rotation, diversity of crop rotation, persistence of crop residues in the soil surface, frequency of soil tillage, use of agricultural terraces, evaluation of soil conservation, balance of soil fertilization and time of adoption of the no-tillage system. The aim of this study was to assess the extent to which these indicators correlate with the no-tillage system participatory quality index and to characterize the farmers who participated in the research. The data used were provided by ITAIPU Binacional for the indicators of the no-tillage... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Farmers; Conservation agriculture; Crop rotation; Soil and water conservation; Sustainable agriculture. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-43662020000200128 |
| |
|
|
|
