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Production systems, land cover change and soil factors affecting pasture production in semi-arid Nakasongola

Research Paper | May 1, 2012

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Emmanuel Zziwa, Geoffrey Kironchi, Charles Gachene, Swidiq Mugerwa, Denis Mpairwe

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Int. J. Agron. Agri. Res.2( 5), 1-12, May 2012


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The current pace of rangeland degradation imparted by appalling land use and management systems is greatly limiting the potential of the soil resource to support pasture production in semi-arid rangelands of Uganda. Our objectives were to determine the effects of land cover change and production systems on pasture biomass yield and to identify the critical soil factors affecting pasture production in Nakasongola. The area was stratified into three production systems and three land cover types from which six pasture and soil samples were collected following a Modified-Whittaker sampling method. Pasture biomass was significantly high (p < 0.0001) under herbaceous cover (2019 kg/ha) compared to woody (1302 kg/ha) and bare which had no pasture biomass. The settled production system had a significantly (p = 0.013) high pasture biomass (1266 kg/ha) compared to non settled (1102 kg/ha) and semi settled systems (953 kg/ha). Biomass yield was more associated with high levels of organic matter (r = 0.91), calcium (r = 0.91), magnesium (0.83), nitrogen (r = 0.77) and base saturation (r = 0.88). It can be concluded that maintaining native vegetation cover of the rangelands and increasing levels of limiting nutrients are the major strategies for increasing pasture production in semi-arid rangelands of Nakasongola.


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Production systems, land cover change and soil factors affecting pasture production in semi-arid Nakasongola

Archer S. 1994. Woody plant encroachment into southwestern grasslands and savannas: rates, patterns and proximate causes. In: Vavra M, Laycock WA, Pieper RD (eds) Ecological Implications of Livestock Herbivory in the West: Society of Range management. Denver CO, p. 13 – 68.

Archer S, Schimel DS, Holland EA. 1995. Mechanisms of shrubland expansion: land use, climate or Carbon dioxide. Climate change 29, 91-99.

Azardi H, van den Berg J, Shahvali M, Hosseininia G. 2009. Sustainable rangeland management using fuzzy logic: A case study in southwest Iran. Agriculture, Ecosystems and Environment 131, 193 – 200.

Bartolome JW. 1993. Application of herbivory optimization theory to rangelands of the Western United States. Ecological Applications 3, 27–9.

Biamah EK. 1986. Technical and socio-economic considerations in rehabilitating and conserving an eroded/denuded catchment area: A case study of the Chemeron catchment area in Central Baringo. In: Thomas DB, Biamah EK, Kilewe, AM, Lundgren, L, Mochoge, BO (eds) Soil and water conservation in Kenya: Proceedings of the 3rd National Workshop held at Kabete, Nairobi. 16th – 19th Sept. 1986.

Blake GR, Hartge KH. 1986. Bulk density. In: Klute A (eds) Methods of soil analysis, part 1, 2nd Edition: Agron. Ser. No. 9 Amer. Soc. Agron. Inc., Madison, Wisconsin, p. 363-382.

Briggs  JM,  Knapp  AK,  Brock  BL.  2002. Expansion of woody plants in tallgrass prairie: A fifteen year study of fire and fire-grazing interactions. American Middle Naturalist 147, 287– 294.

Briske DD, Derner JD, Brown JR, Fuhlendorf SD, Teague WR, Havstad KM, Gillen RL, Ash AJ, Willms WD. 2008. Rotational grazing on rangelands: Reconciliation of perception and experimental evidence. Rangeland Ecology and Management 61, 3-17.

Brown JR, Archer S. 1999. Shrub invasion of grassland: recruitment is continuous and not regulated by herbaceous biomass or density. Ecology 80, 2385–96.

Brown JR, Archer S. 1989. Woody plant invasion of grasslands: Establishment of honey mesquite (Prosopis glandulosa var. glandulosa) on sites differing in herbaceous biomass and grazing history. Oecologia 80, 19-26.

Cleemput S, Muys B, Kleinn C, Janssens MJJ. 2004. Biomass estimation techniques for enclosures in a semi-arid area: a case in Northern Ethiopia. Paper presented in Deutscher Tropentag, 2004, Berlin, Germany. Available at: http://www.troptang.de/2004/abstracts/full/3.pdf.

Derner JD, Hart RH. 2007. Grazing-induced modifications to peak standing crop in northern mixed-grass prairie. Rangeland Ecology and Management 60, 270–276.

Ekaya WN, Kinyamario JI. 2003. Herbaceous vegetation productivity in an arid rehabilitated rangeland in Kenya. In Allsopp N (eds) VIIth International Rangelands Congress, 26th July-1st August 2003, Durban, South Africa. ISBN: 0-958-45348-9.

Gee GW, Bauder JW. 1986. Particle-size analysis. In: Klute A (eds) Methods of soil analysis, part 1, 2nd Edition: Agron. Ser. No. 9 Amer. Soc. Agron. Inc., Madison, Wisconsin, p. 383 – 411.

Harrington GK. 1974. Fire effects on a Ugandan savanna grassland. Tropical grasslands 8, 87 – 101.

Higgins SI, Bond WJ, Trollope WSW. 2000. Fire, resprouting and variability: a recipe for grass-tree coexistence in savanna. Journal of Ecology 13, 295-299.

Hudak AT, Wessman CA. 2001. Textural analysis of high resolution imagery to quantify bush encroachment in Madikwe Game Reserve, South Africa, 1955-1996. International Journal of Remote Sensing 22, 2731-2740.

Hudak AT, Wessman CA, Seastedt TR, 2003. Woody overstorey effects on soil carbon and nitrogen pools in South African savanna. Austral Ecol. 28, 173–181.

ISSCAS (Institute of Soil Science, Chinese Academy of Sciences). 1978. Physical and Chemical Analysis methods of soils. China shanghai science technology press, shanghai, p. 7-59.

Jeltsch F, Weber GE, Grimm V. 2000. Ecological buffering mechanisms in savannas: a unifying theory of long-term tree–grass coexistence. Plant Ecology 150, 161-171.

Kemper WD, Rosenau RC. 1986. Aggregate stability and size distribution. In: Klute A (ed) Methods of Soil Analysis. Part 1. Physical and Mineralogical Methods, Vol. 9, 2nd Edition. SSSA, Madison, WI, p. 425–442.

Kironchi G. 1998. Influence of soil, climate and land use on soil water balance in the Upper Ewaso Ng’iro Basin in Kenya. PhD thesis, University of Nairobi.

Kirumira FD. 2008. Status of livestock feed resources in ASALS of Uganda. In: Proceedings of Sub-Regional workshop on managing East African rangelands for better response to feed crisis, 19 – 12 November 2008, Addis Ababa, Ethiopia.

Kisamba-Mugerwa W. 2001. Rangelands management policy in Uganda. A Paper Presented in the International Conference on Policy and Institutional Options for the Management of Rangelands in dry Areas. May 7 – 11, 2001, Hammamet, Tunisia.

Kosmas C, St. Gerontidis, Marathianou M. 2000. The effect of land use change on soils and vegetation over various lithological formations on Lesvos (Greece). Catena 40, 51 – 68.

Kristjanson P, Place F, Franzel S, Thornton PK. 2002. Assessing research impact on poverty: the importance of farmers’ perspectives. Agricultural systems 72(1), 78 – 92

Langdale-Brown I, Osmaston HA, Wilson JG. 1964. The vegetation of Uganda and its bearing on land-use. CABI direct. P. 147.

Lechmere-Oertel RG. 2003. The effects of goat browsing on ecosystem patterns and processes in succulent thicket, South Africa. PhD. Thesis, University of Port Elizabeth, South Africa.

Makokha W, Lonyakou S, Nyang M, Kareko KK, Holding C, Njoka TJ, Kitalyi A. 1999. We were together: Land rehabilitation and household dynamics in Chepararia Division, west Pokot District, Kenya. RELMA Technical Report No. 22. Nairobi Kenya: RELMA/SIDA. ISBN 9966-896-42-2, 81pg.

Mebius LJ. 1960. A rapid method for the determination of organic carbon in soil. Anal. Chim. Acta, 22: 120-124.

Mehta NC, Legg JO, Goring CAI, Black CA. 1954. Determination of organic phosphorus in soils. I. Extraction method. Soil Sci. Soc. Amer. Proc. 18:4.13-449.

Mugerwa S, Mpairwe D, Sabiiti EN, Mutetika D, Kiwuwa G, Zziwa E, Peden D. 2008. Effect of cattle manure and reseeding on pasture productivity. Proceeding of second International Forum on Water and Food. 10th – 16th November 2008, Addis Ababa, Ethiopia. Volume II – IFWF2 Science Session papers, p. 65 – 68.

Mureithi SM. 2006. The effect of enclosures on rehabilitation of degraded semi-arid land in Lake Baringo Basin, Kenya. MSc. Thesis, Ghent University, Belgium

Mureithi SM, Verdoodt A, Van Ranst E. 2010. Effects and implications of enclosures for rehabilitating degraded semi-arid rangelands: Critical lessons from Lake Baringo Basin, Kenya. In: Zdruli P, Pagliai M, Kapur S, Cano AF (eds) Land Degradation and Desertification: Assessment, Mitigation and Remediation: Springer Dordrecht Heidelberg London New York, p. 111-130.

Noy–Meir I. 1993. Compensating growth of grazed plants and its relevance to the use of rangelands. Ecol. Appl. 3, 32–40.

O’Connor TG. 1991. Local extinction in perennial grasslands: A life-history approach. Am. Nat. 137: 735 – 773.

Radwanski SA. 1960. The soils and land use of Buganda. A reconnaissance survey. In the Memoirs of the research division, series 1 – Soils, Number 4. 631.44 (676.1) UGA. Pages 1 – 133.

Roberts MJ, Long SP, Tiesszen LL, Beadle CL. 1993. Measurement of plant biomass and net primary production of herbaceous vegetation. In: Hall DO, Scurlock JMO, Borhar-Nordenkam HR, Leegood RC, Long SP (eds) Photosynthesis and production in a changing environment: Field and laboratory manual. Chapman and Hall, London, p. 1– 21.

Roques KG, O’Connor TG, Watkinson AR. 2001. Dynamics of Shrub Encroachment in an African Savanna: Relative Influences of Fire, Herbivory, Rainfall and Density Dependence. Journal of Applied Ecology 38, 268-280.

Schuman GE, Ingram LJ, Stahl PD, Derner JD, Vance GF, Morgan JA. 2009. Influence of Management on Soil Organic Carbon Dynamics in Northern Mixed-Grass Rangeland. In Soil Carbon Sequestration Second Edition. Chapter 11, 169 pgs. Schofield RK, Taylor AW. 1955. The measurement of soil pH. Soil Sci. Soc. Am. Proc. 19, 164-167.

Stohlgren TJ, Falkner MB, Schell LD. 1995. A Modified-Whittaker nested vegetation sampling method. Vegetation 117, 113 – 121.

Van Auken OW, Bush JK. 1997. Growth of Prosopis glandulosa in response to changes in aboveground and belowground interference. Ecology 78, 1222–1229.

Van Auken OW. 2000. Shrub invasions of North American semiarid grasslands. Annual Review of Ecology and Systematics 31, 197–215.

Verity GE, Anderson DW. 1990. Soil erosion effects on soil quality and yield. Canadian Journal of Soil Science 70, 471-484.

Wessman C, Archer S, Johnson L, Asner G. 2004. Woodland expansion in US grasslands: Assessing land-cover change and biogeochemical impacts. In Gutman G (eds) Land change science: Observing, monitoring and understanding trajectories of change on the Earth’s surface. Kluwer Academic Publ., Dordrecht, the Netherlands, p. 185–208.

Wilcoks J, Howden M, Sutherst B, Henry B. 2003. Glossary. Climate changes. State of Queensland, Australia: department of National Resources and mines. Available at: http://www.longpaddock.qld.gov.au/climatechange /slides/glossary.html.

Wilson AD. Macleod ND. 1991. Overgrazing: present or absent? Journal of Range Management 44, 475 – 482.