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| Ngobo, Martine; IITA; m.ngobo@cgiar.org; McDonald, Morag; University of Wales, Bangor; mamcd@bangor.ac.uk; Weise, Stephan; ; s.weise@cgiar.org. |
| In the humid forest regions of southern Cameroon in central Africa, sectoral and macroeconomic policy reforms introduced in the late 1980s have led to intensified land use, which in turn has resulted in, among other environmental consequences, shortened fallow systems dominated by the Asteraceae shrub, Chromolaena odorata (L.) King and Robinson, rather than by secondary forest species. A trial was established to determine the effect of shortened fallow duration and invasion by C. odorata on the weed flora in subsequent mixed food cropping systems. Plots were established in cleared 5- to 7-year-old fallow fields in which the vegetation was either dominated by C. odorata or not, and in which the dominant fallow vegetation in the previous... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: CVA; Cameroon; Chromolaena odorata; Fallow; Weeds. |
| Ano: 2004 |
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| Mochiutti, Silas; Queiroz, José Antonio Leite de; Melém Junior, Nagib Jorge. |
| This study aimed to evaluate the total and seasonal deposition of biomass, concentration and total amount of nutrient in litter of a taxi-branco stand and of a secondary forest, both 9 years old and established in area deforested by shifting cultivation. Thirty collectors 1.5 m2 were distributed (20 at taxi-branco and ten at secondary forest). Litter was collected monthly, oven-dried and analyzed for concentrations of N, P, K, Ca and Mg. The annual deposition of litter was 9646 kg/ha in taxi-branco stand and 4474 kg/ha in secondary forest. Litter production was greater in the lower precipitation period (August to November), comprising 74% and 56% of the annual production of the taxi-branco stand and secondary forest, respectively. Taxi-branco litter had... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Litterfall; Fallow; Soil rehabilitation; Sclerolobium paniculatum; Brazilian Amazon. Liteira; Capoeira; Recuperação de solos; Amazônia.. |
| Ano: 2011 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/201 |
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| Ferreira,Alexandre Cunha de Barcellos; Borin,Ana Luiza Dias Coelho; Bogiani,Julio Cesar; Lamas,Fernando Mendes. |
| Abstract: The objective of this work was to evaluate the dry matter yield of cover crops and their suppressive effects on weeds. The experiment was carried out during three years in a cerrado area of the state of Goiás, Brazil, and consisted of 16 treatments with fallow and cover crops cultivated in single cropping and intercropping. Fallow allowed high weed infestation. Cover crops affected the composition of weeds, which showed greater diversity in fallow, followed by the Pennisetum glaucum 'BRS 1501' and Cajanus cajan crops. In the average of the three experimental years, the highest dry matter yield was observed for the treatments Panicum maximum (10,857 kg ha-1), Urochloa brizantha 'Piatã' (11,437 kg ha-1), U. ruziziensis (9,463 kg ha-1), and U.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fallow; Species composition; Straw mulch; Weed control. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2018000500566 |
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| RAIMONDI,R.T.; CONSTANTIN,J.; MENDES,R.R.; OLIVEIRA JR.,R.S.; RIOS,F.A.. |
| ABSTRACT: Currently, sourgrass is one of the most important weeds in grain production areas in Brazil. The objective of this work was to evaluate the efficiency of associated systems composed by mowing and chemical control against clumped sourgrass. In the first experiment, different mowing heights (0, 5, 10, 15 and 20 cm), coupled with complementary applications of glyphosate + clethodim, were evaluated on sourgrass control. The second experiment was composed by programs starting with fallow mowing at different times, 50 (early), 35 (intermediate) and 20 (late) days before soybean sowing. After mowing, treatments were followed by herbicide applications according to the need until soybean harvest. The shorter the mowing height associated with herbicide... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Digitaria insularis; Mechanical control; Soybean; Fallow. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-83582020000100232 |
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| Klemick, Heather. |
| This study examines the drivers of land use in a shifting cultivation system with forest fallow. Forest fallow provides on-farm soil quality benefits, local hydrological regulation, and global public goods. An optimal control model demonstrates that farmers have an incentive to fallow less than is socially optimal, though market failures limiting crop production can have a countervailing effect by encouraging fallow. An econometric model estimated using data from the Brazilian Amazon suggests that fallowing does not result from internalization of local fallow services but instead is associated with poor market access and labor and liquidity constraints. |
| Tipo: Article |
Palavras-chave: Forest; Farms; Fallow; Ecosystem services; Land use; Spatial econometrics; Brazil; Credit; International Development; Land Economics/Use. |
| Ano: 2011 |
URL: http://purl.umn.edu/120270 |
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| Sohail-Ijaz,Shahzada; Ali,Safdar. |
| Clean fallowing has been criticized in the recent past due to the fact that it causes accelerated soil erosion, emission of CO2 to the atmosphere and reduction in farm income. In an effort to reduce fallowing in Pothwar, Pakistan, field experiments were carried out from 2005 through 2008 at three locations (Rawalpindi, Chakwal and Fateh Jang). The experimental design was split-plot and treatments were applied as follows: conventional cultivator, moldboard plow and minimum tillage in main plots; fallow, legume (mungbean, Vigna radiata) and mulch of wheat straw were used in sub plots. Wheat (Triticum aestivum) was planted in all the subplots during winter. All the treatment plots had equivalent volumetric water content at wheat planting. Consequently, the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fallow; Tillage; Mungbean; Soil water content; Wheat; Gross margins. |
| Ano: 2011 |
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952011000100005 |
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