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Full-Text Articles in Physical Sciences and Mathematics
Carbon-Nitrogen Ratios In Rangeland Soils In Various Agriculture Response Units In Three Watersheds In The Central Himalayas, India, Nanda Nautiyal, Vir Singh
Carbon-Nitrogen Ratios In Rangeland Soils In Various Agriculture Response Units In Three Watersheds In The Central Himalayas, India, Nanda Nautiyal, Vir Singh
IGC Proceedings (1997-2023)
CN ratios of rangeland soils in selected agriculture response units (ARUs) prevailing in three watersheds, Kosi, Alaknanda, and Pindar, in the Indian Central Himalayan mountains were analyzed. The ratios varied significantly (P<0.05) with ARUs and seasons. Interaction between ARUs and season was also found significant (P<0.05). In Alaknanda Watershed soil CN ratios ranged from 6.62 to 20.58. Soil CN ratio values differed significantly (P<0.05) with seasons and ARUs. Soil CN ratios in the rangelands of Pindar Watershed were recorded between 6.54 and 11.29. The ratios varied significantly (P<0.05) in seasons and ARUs. Interaction between ARUs and season was also found significant (P<0.05). Rangeland soil CN ratio values of all ARUs were further statistically analyzed in all three watersheds. Minimum soil CN ratios were seen at Pindar and maximum at Alaknanda watershed. The ratios variation was seen in all the rangelands and it was found significant at a significance level of 5%. Interaction between Kosi and Alaknanda was found non-significant while between Kosi and Pindar and Alaknanda and Pindar it was significant (P<0.05) throughout the study. Variation in soil CN ratios in both agricultural and rangeland soils was seen in each watershed. In the Kosi watershed, soil CN ratios ranged from 6.74 to 15.06; in Alaknanda from 6.36 to 20.58 and in Pindar from 5.75 to 14.38. CN ratios have an absolute relationship with temperature and are higher when higher rainfall occurs and moisture prevails. The ratios also impact soil acidity and other soil quality parameters.
Carbon Sequestration In Desertified Rangelands Of Hossein-Abad, Iran: A Participatory Approach, F. Amiraslani
Carbon Sequestration In Desertified Rangelands Of Hossein-Abad, Iran: A Participatory Approach, F. Amiraslani
IGC Proceedings (1997-2023)
The Hossein-abad (H.A) area is located in Southern Khorasan Province of Iran and covers some 148,000 ha. This is one of the poorest regions in the country and has a large area of degraded rangelands. Following a request from local people and in line with national and global goals, a carbon sequestration initiative has been funded by I.R.Iran and GEF(Global Environmental Facility) from April 2003. The objective is to promote and model carbon sequestration through developing range species in cooperation with local people and using a participatory approach. The immediate target beneficiaries are the people living in the project area …
Enhancement Of Grassland Production Through Integration Of Forage Legumes In Semi-Arid Rangelands Of Kenya, P. N. Macharia, J. I. Kinyamario, W. N. Ekaya, C. K. K. Gachene
Enhancement Of Grassland Production Through Integration Of Forage Legumes In Semi-Arid Rangelands Of Kenya, P. N. Macharia, J. I. Kinyamario, W. N. Ekaya, C. K. K. Gachene
IGC Proceedings (1997-2023)
Livestock production in semi-arid rangelands of Kenya is limited by the seasonal quantity and quality of fodder. Kirkman & Carvalho (2003) stated that these inter- and intra-seasonal quality and quantity fluctuations result in nutrient deficits that severely limit livestock production potential. The objective of this experiment was to study the effect of three forage legumes on the production of natural pastures in semi-arid rangelands of Kenya.
The Effect Of Fertiliser Treatment On The Development Of Rangelands In Argentina, Ezequiel M. Latorre, Mónica B. Sacido
The Effect Of Fertiliser Treatment On The Development Of Rangelands In Argentina, Ezequiel M. Latorre, Mónica B. Sacido
IGC Proceedings (1997-2023)
In Argentina grazing of rangelands may result in a decrease in winter gramineous species with an increase in summer weeds such as Cynodon dactylon. Lolium multiflorum is an important forage resource for grazing in the autumn, winter and spring. A delay in its emergence may occur because of summer weeds, which reduces the germination rate. The proportion of the seed bank as ryegrass allows the recovery of natural grassland and facilitates an increase in the productivity of livestock. The objective of this study was the evaluation of the impact of application of fertiliser in the short term on the …
Stocking Rate Theory And Profit Drivers In North Australian Rangeland Grazing Enterprises, Neil D. Macleod, A. J. Ash, John G. Mcivor
Stocking Rate Theory And Profit Drivers In North Australian Rangeland Grazing Enterprises, Neil D. Macleod, A. J. Ash, John G. Mcivor
IGC Proceedings (1997-2023)
Setting correct stock numbers is a key decision for successful pastoralism. In marginal environments, typified by northern Australia, this involves careful cattle herd management across landscapes and seasons characterised by heterogeneous land condition and extreme climatic uncertainty. Stocking rate theory which links animal production to stocking rates concentrates only on liveweight gain of sale animals and ignores complex herd (e.g. reproduction, mortality) and pasture dynamics (e.g. land condition) and costs of maintaining stock numbers (e.g. supplementary feeding). Related economic models are generally naïve and incomplete, being based on liveweight gain, meat prices and variable husbandry costs (e.g. Workman, 1986). Modelling …
An Ecosystem Modelling Approach To Rehabilitating Semi-Desert Rangelands Of North Horr, Kenya, G. A. Olukoye, W. N. Wamicha, J. I. Kinyamario
An Ecosystem Modelling Approach To Rehabilitating Semi-Desert Rangelands Of North Horr, Kenya, G. A. Olukoye, W. N. Wamicha, J. I. Kinyamario
IGC Proceedings (1997-2023)
Decreased rainfall, recurrent droughts and increased anthropogenic activities have led to a dramatic increase in wind erosion on pastoral lands of North Horr resulting in the reactivation of the once-stable sand dunes. This has degraded the vegetation and impoverished the local community. Mobile sand has a severe impact on dry season grazing areas (Omar & Abdal, 1994) and, therefore, affects pastoral livestock production. In North Horr, Suaeda monoica is important in camel production and for stabilising sand dunes but it has been over-utilized over the years. The objective of this study was to use ecosystem modelling approaches to examine the …