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• W11919782 abstract "Land degradation is threatening biological resources and agricultural productivity, the mainstay of the economy in Ethiopia. Ensuring sustainable food and biomass supply while maintaining ecological integrity in Ethiopia requires two imperative efforts: (i) the sustainable use of productive land resources, and (ii) effective regeneration of degraded ecosystems. This thesis aims to (i) identify trends in soil quality and native flora degradation due to deforestation and subsequent cultivation using a chronosequence of farm fields converted from a tropical dry Afromontane forest; and (ii) investigate the possibilities for restoration of soil quality and native flora on degraded sites with the help of reforestation. The studies were conducted near and in the Munessa-Shashamane forest, which is located on the eastern escarpment of the Central Ethiopian Rift Valley. The results showed that following deforestation and subsequent cultivation, soil organic carbon (SOC) and total N declined exponentially in the 0-10 cm layer of the soil. In the same soil layer, analysis based on 13C natural abundance revealed that SOC of forest origin was declining by 740 kg C ha-1 yr-1, while addition to the SOC from agricultural crops was about 240 kg C ha-1 yr-1. The imbalance in SOC addition from the crops and loss of SOC of forest origin has led to the continuous decline of SOC in the bulk soil by 500 kg C ha-1 yr-1. The loss of N from the surface soil of the farm fields was 66 kg N ha-1 yr-1 as compared with the fertilizer application rate of 35 kg N ha-1 yr-1 in the area, which, however, is seldom applied due to economic constraints for the farmers. Soil bulk density increased and pore space decreased progressively in the 0-10 and 10-20 cm soil layers with increasing cultivation period after deforestation. Other soil proprieties such as available P and K, exchangeable K, Ca and Mg, BS and CEC also changed significantly but at a slow rate. Most of the significant changes were limited to the top 0-10 cm layer. At the present level of management, the soils of the study area can be used for 25-30 years without loss of productivity. This 25-30 year period of sustainable use is much longer than most reports for tropical soils subject to similar land use changes, and this was attributed to the volcanic nature of the soils and the traditional low intensity tillage practice coupled with the parkland agroforestry used in the farming systems investigated. It was also observed that as tillage intensity shifts from the traditional low tillage to high intensity mechanized tillage the rate of soil degradation increases, which may reduce the period of sustainable use of the deforested sites. Deforestation and subsequent cultivation of the tropical dry Afromontane forest investigated also endangered the native forest biodiversity, not only through the outright loss of habitat but also by deteriorating the soil seed banks. The results showed that the contribution of woody species to the soil seed flora declined from 5.7% after 7 years to nil after 53 years of continuous cultivation. However, soil quality and native flora degradation are reversible through reforestation. Reforestation of bandoned farm fields with fastgrowing tree species was shown to restore soil quality. Tree plantations established on degraded sites also fostered the recolonization of diverse native forest flora under their canopies. An important result from studying the effects of reforestation is that good silviculture, particularly selection of appropriate tree species, can significantly affect the rate and magnitude of both soil quality and biodiversity restoration processes." @default.
• W11919782 created "2016-06-24" @default.
• W11919782 creator A5073198989 @default.
• W11919782 date "2004-05-01" @default.
• W11919782 modified "2023-09-23" @default.
• W11919782 title "Effects of land use changes on soil quality and native flora degradation and restoration in the highlands of Ethiopia" @default.
• W11919782 cites W1007936037 @default.
• W11919782 cites W121259039 @default.
• W11919782 cites W124114393 @default.
• W11919782 cites W143084325 @default.
• W11919782 cites W1487874490 @default.
• W11919782 cites W1488162564 @default.
• W11919782 cites W1500901628 @default.
• W11919782 cites W1509812492 @default.
• W11919782 cites W1512767330 @default.
• W11919782 cites W1519966989 @default.
• W11919782 cites W1521516369 @default.
• W11919782 cites W1526752642 @default.
• W11919782 cites W1532540194 @default.
• W11919782 cites W1534725486 @default.
• W11919782 cites W1537315760 @default.
• W11919782 cites W1549899442 @default.
• W11919782 cites W1551696570 @default.
• W11919782 cites W155240859 @default.
• W11919782 cites W155456926 @default.
• W11919782 cites W1558597638 @default.
• W11919782 cites W1565385535 @default.
• W11919782 cites W1567738256 @default.
• W11919782 cites W1575269279 @default.
• W11919782 cites W1581373431 @default.
• W11919782 cites W1590208058 @default.
• W11919782 cites W1590867654 @default.
• W11919782 cites W1592824240 @default.
• W11919782 cites W1595010721 @default.
• W11919782 cites W1597851536 @default.
• W11919782 cites W1602274247 @default.
• W11919782 cites W1602596512 @default.
• W11919782 cites W1606688126 @default.
• W11919782 cites W167799391 @default.
• W11919782 cites W16831195 @default.
• W11919782 cites W169344794 @default.
• W11919782 cites W171985881 @default.
• W11919782 cites W177330557 @default.
• W11919782 cites W1782304435 @default.
• W11919782 cites W1871567206 @default.
• W11919782 cites W189017171 @default.
• W11919782 cites W1935736433 @default.
• W11919782 cites W1963808324 @default.
• W11919782 cites W1965340109 @default.
• W11919782 cites W1966842375 @default.
• W11919782 cites W1966877381 @default.
• W11919782 cites W1968915941 @default.
• W11919782 cites W1972724176 @default.
• W11919782 cites W1974921304 @default.
• W11919782 cites W1975103232 @default.
• W11919782 cites W1978626567 @default.
• W11919782 cites W1980813964 @default.
• W11919782 cites W1982338155 @default.
• W11919782 cites W1982863505 @default.
• W11919782 cites W1987347652 @default.
• W11919782 cites W1993615304 @default.
• W11919782 cites W1993818285 @default.
• W11919782 cites W1994756171 @default.
• W11919782 cites W1998614902 @default.
• W11919782 cites W2000123603 @default.
• W11919782 cites W2000804828 @default.
• W11919782 cites W2003170228 @default.
• W11919782 cites W2004725342 @default.
• W11919782 cites W2005197303 @default.
• W11919782 cites W2011642679 @default.
• W11919782 cites W2012356788 @default.
• W11919782 cites W2013242069 @default.
• W11919782 cites W2015126745 @default.
• W11919782 cites W2015257937 @default.
• W11919782 cites W2016452580 @default.
• W11919782 cites W2017898133 @default.
• W11919782 cites W2020446673 @default.
• W11919782 cites W2023087699 @default.
• W11919782 cites W2025784823 @default.
• W11919782 cites W2026621199 @default.
• W11919782 cites W2028714222 @default.
• W11919782 cites W2029102522 @default.
• W11919782 cites W2035028510 @default.
• W11919782 cites W2036206776 @default.
• W11919782 cites W2036341455 @default.
• W11919782 cites W2037356735 @default.
• W11919782 cites W2037602347 @default.
• W11919782 cites W2040226270 @default.
• W11919782 cites W2040575361 @default.
• W11919782 cites W2041823965 @default.
• W11919782 cites W2042839361 @default.
• W11919782 cites W2043113920 @default.
• W11919782 cites W2043188714 @default.
• W11919782 cites W2043440862 @default.
• W11919782 cites W2043482491 @default.
• W11919782 cites W2044011726 @default.
• W11919782 cites W2044853444 @default.
• W11919782 cites W2046705741 @default.
• W11919782 cites W2047142720 @default.
• W11919782 cites W2048036238 @default.

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