Open Access. Powered by Scholars. Published by Universities.®
- Institution
-
- University of Kentucky (4548)
- University of Nebraska - Lincoln (988)
- University of South Florida (370)
- Department of Primary Industries and Regional Development, Western Australia (343)
- Utah State University (262)
-
- Western Kentucky University (241)
- University of Arkansas, Fayetteville (188)
- University of Texas Rio Grande Valley (180)
- University of Colorado Law School (164)
- Old Dominion University (76)
- East Tennessee State University (66)
- University of Nevada, Las Vegas (57)
- Missouri University of Science and Technology (56)
- Montclair State University (56)
- Portland State University (53)
- Boise State University (52)
- TÜBİTAK (49)
- California Polytechnic State University, San Luis Obispo (48)
- South Dakota State University (48)
- University of North Dakota (47)
- Central Washington University (46)
- City University of New York (CUNY) (44)
- Western Michigan University (44)
- University of Northern Iowa (40)
- Louisiana State University (39)
- Wright State University (37)
- Fort Hays State University (36)
- Smith College (36)
- University of Minnesota Morris Digital Well (36)
- University of New Hampshire (36)
- Keyword
-
- Grazing (280)
- Western Australia (245)
- Climate change (151)
- Sheep (131)
- Soil (130)
-
- Cattle (117)
- Nitrogen (110)
- Pasture (103)
- Water quality (101)
- Forage (99)
- Drought (97)
- Geology (96)
- Groundwater (92)
- Intake (92)
- Grassland (91)
- Livestock (87)
- Biodiversity (86)
- Digestibility (85)
- Silage (83)
- Sustainability (83)
- Natural resources (82)
- Stocking rate (82)
- Phosphorus (78)
- Conservation (77)
- Forage quality (77)
- Grains and field crops (77)
- United States (77)
- Agriculture (74)
- Alfalfa (73)
- Grazing management (67)
- Publication Year
- Publication
-
- IGC Proceedings (1977-2023) (4103)
- United States Geological Survey: Staff Publications (354)
- International Journal of Speleology (229)
- Kentucky Alfalfa and Stored Forage Conference (147)
- School of Earth, Environmental, & Marine Sciences Faculty Publications (142)
-
- Theses and Dissertations (138)
- Mammoth Cave Research Symposia (133)
- Kentucky Grazing Conference (129)
- Electronic Theses and Dissertations (112)
- Graduate Theses and Dissertations (89)
- Department of Earth and Atmospheric Sciences: Faculty Publications (82)
- Memorandum (82)
- School of Natural Resources: Dissertations, Theses, and Student Research (81)
- Masters Theses (74)
- Faculty Publications (70)
- Resource management technical reports (68)
- Experimental Summaries - Plant Research (63)
- All Graduate Theses and Dissertations, Spring 1920 to Summer 2023 (62)
- School of Geosciences Faculty and Staff Publications (60)
- Journal of the Department of Agriculture, Western Australia, Series 4 (54)
- Masters Theses & Specialist Projects (52)
- United States Environmental Protection Agency: Publications (51)
- Turkish Journal of Earth Sciences (49)
- USF Tampa Graduate Theses and Dissertations (46)
- Bulletin of the University of Nebraska State Museum (1924–2023) (45)
- Bulletins 4000 - (43)
- Daugherty Water for Food Global Institute: Faculty Publications (43)
- United States Geological Survey: Publications (43)
- Journal of the Arkansas Academy of Science (40)
- National Drought Mitigation Center: Faculty Publications (39)
- Publication Type
- File Type
Articles 1831 - 1860 of 9404
Full-Text Articles in Entire DC Network
Study Of Characteristics Of Soil Animals In Halophilous Plant Communities Of Leymus Chinensis Grasslands Of Northeast In China, Xiuqin Yin, Y. Zhang, W. Dong
Study Of Characteristics Of Soil Animals In Halophilous Plant Communities Of Leymus Chinensis Grasslands Of Northeast In China, Xiuqin Yin, Y. Zhang, W. Dong
IGC Proceedings (1977-2023)
We have researched soil animals in 8 types of halophilous plant communities of Leymus chinensis grasslands of Northeast China to characterise soil animal groups and explain the role and function of soil animals in grassland ecosystems (Richard & Roger, 1998) and provide a scientific basis for research to improve alkaline lands in these grasslands.
Spatial Distribution Of Soil Macroinvertebrates In A Dry Steppe (South-Eastern Siberia, Russia), K. B. Gongalsky
Spatial Distribution Of Soil Macroinvertebrates In A Dry Steppe (South-Eastern Siberia, Russia), K. B. Gongalsky
IGC Proceedings (1977-2023)
Soil macroinvertebrates are important components of ecosystems. They play a key role in decomposition processes and turnover of the most of elements. Adequate estimation of abundance and biomass of these animals is fundamental for understanding their input in steppe ecosystems. Asian steppes of Russia are poorly studied. Therefore, baseline soil invertebrate composition, abundance and rules of distribution were estimated.
Grazing Effects On Spatial Microdistribution Of Soil Macroinvertebrates In A Steppe Of European Russia, F. A. Savin, K. B. Gongalsky, A. D. Pokarzhevskii
Grazing Effects On Spatial Microdistribution Of Soil Macroinvertebrates In A Steppe Of European Russia, F. A. Savin, K. B. Gongalsky, A. D. Pokarzhevskii
IGC Proceedings (1977-2023)
Measures of ecosystems and their populations include biomass, production and trophic composition and animal spatial distribution. Grazing of grasslands influences spatial distribution of vegetation seriously. The same effects on soil macroinvertebrates are less well studied. Spatial distribution is usually studied at a coenosis level, and not at a studied point level, although the scale of sampling has a giant importance in estimation of organism's distribution. The aim of our study was to estimate grazing impact on large soil invertebrates in steppe ecosystems in Chernozem Nature Reserve in Russia.
The Victorian Volcanic Plains Grassland: Past, Present And Future, Steve G. Clark, J. Crosthwaite, J. Dorrough, J. R. Hirth, Y. Ingeme, J. Mavromihalis, V. Turner
The Victorian Volcanic Plains Grassland: Past, Present And Future, Steve G. Clark, J. Crosthwaite, J. Dorrough, J. R. Hirth, Y. Ingeme, J. Mavromihalis, V. Turner
IGC Proceedings (1977-2023)
The Grasslands of the Victorian Volcanic Plains have been replaced with introduced pastures and crops since European settlement with the loss of many plant and animal species. What remains, on public and private land, has high conservation value and needs urgent protection.
Evaluation Of Sweet Grain Sorghum Silage For Dairy Cows As An Alternative To Irrigated Maize Silage, W. G. Do Nascimento, Y. Barrière, X. Charrier, Christian Huyghe, J. C. Emile
Evaluation Of Sweet Grain Sorghum Silage For Dairy Cows As An Alternative To Irrigated Maize Silage, W. G. Do Nascimento, Y. Barrière, X. Charrier, Christian Huyghe, J. C. Emile
IGC Proceedings (1977-2023)
Under European dairy cattle rearing conditions, whole plant maize silage is the main part of the dairy cow's diet especially during the winter season. Nevertheless maize production can be limited in some areas because summer rainfall is insufficient and so irrigation is necessary. Grain sorghum hybrids, and especially sweet sorghum types, are potentially of great interest to avoid this water consumption (Lemaire et al., 1996, Legarto, 2000). For this reason we evaluated in 2003 the benefits and limits of a sweet grain sorghum silage for dairy milk production, compared to an irrigated maize silage. We paid particularl attention to …
Enhancing Water Use Efficiency On Irrigated Dairy Pastures With Nitrogen Fertiliser, Frank R. Mckenzie, J. L. Jacobs, G. N. Ward
Enhancing Water Use Efficiency On Irrigated Dairy Pastures With Nitrogen Fertiliser, Frank R. Mckenzie, J. L. Jacobs, G. N. Ward
IGC Proceedings (1977-2023)
Low summer rainfall in southwest Victoria, Australia, restricts pasture growth and limits milk production. One fifth of dairy farmers in the region have some capacity to irrigate during summer. Irrigated dairy pastures are relatively poor utilisers of water with water use efficiencies (WUE) of about 1 t DM/ML water (Ward et al. 1998). Using nitrogen (N) fertiliser may increase dry matter (DM) yields for a given amount of water. Data on N response efficiencies from irrigated pasture in southwest Victoria are lacking. Two experiments determined the potential of N fertiliser to maximise the conversion of irrigated water to pasture …
Influence Of Water Stress On Root/Cladode Ratio And Water-Use Efficiency Of Opuntia Ficus-Indica And O. Robusta, Hennie A. Snyman
Influence Of Water Stress On Root/Cladode Ratio And Water-Use Efficiency Of Opuntia Ficus-Indica And O. Robusta, Hennie A. Snyman
IGC Proceedings (1977-2023)
Due to the regular occurrence of drought in southern Africa, there is a need for more research on drought tolerant fodder plants such as Opuntia (cactus pear) species. In contrast with the cladode system, the roots of cactus pear have received little attention, however, they certainly differ from other plants, as they develop xeromorphic characteristics, enabling the plant to survive prolonged periods of drought (Nobel, 1988). The influence of different water applications was evaluated in terms of root and cladode mass, water-use efficiency (WUE) and root length for one-year-old plants of Opuntia ficus-indica (cultivar Morado) and O. robusta (cultivar Monterey).
Variability In Tolerance To Water Stress By Holcus Lanatus L., Bromus Valdivianus Phil. And Agrostis Capillaris L. Accessions, Ignacio F. López, Oscar A. Balocchi
Variability In Tolerance To Water Stress By Holcus Lanatus L., Bromus Valdivianus Phil. And Agrostis Capillaris L. Accessions, Ignacio F. López, Oscar A. Balocchi
IGC Proceedings (1977-2023)
Holcus lanatus L. (Hl), Bromus valdivianus Phil. (Bv) and Agrostis capillaris L. (Ac) are frequently present in the naturalised pasture of the Chilean humid region, which has a summer drought with two distinguishable areas according to average summer rainfall: a Northern area (Long summer drought, LSuD: 136-186 mm;) and a Southern area (Short summer drought, SSuD: 186-338 mm). It was hypothesised that plant species have colonised areas with different water deficits during summer through differentiated drought tolerance, which would imply ecotype generation.
Phosphorus Transfer To River Water From Grassland Catchments In Ireland, H. Tunney, P. Jordan, G. Kiely, R. Moles, G. Morgan, P. Byrne, W. Menary, K. Daly
Phosphorus Transfer To River Water From Grassland Catchments In Ireland, H. Tunney, P. Jordan, G. Kiely, R. Moles, G. Morgan, P. Byrne, W. Menary, K. Daly
IGC Proceedings (1977-2023)
In Ireland it is estimated that at least half of phosphorus (P) loss to water is from agricultural sources and National and European Union policy and legislation aim at reducing phosphorus (P) loss to water in order to reduce eutrophication. In Ireland, the average soil test P (STP) levels increased ten-fold, from less than 1 to over 8 mg Morgan P per l soil over the past 50 years, reflecting increased P inputs in fertiliser and animal feed. One of the main objectives of this three-year research programme, started in 2001, was to investigate P loss to water in grassland …
Profitable And Sustainable Grazing Systems For Livestock Producers With Saline Land In Southern Australia, Nick Edwards, D. G. Masters, Edward G. Barrett-Lennard, M. Hebart, M. Mccaskill, W. King, W. Mason
Profitable And Sustainable Grazing Systems For Livestock Producers With Saline Land In Southern Australia, Nick Edwards, D. G. Masters, Edward G. Barrett-Lennard, M. Hebart, M. Mccaskill, W. King, W. Mason
IGC Proceedings (1977-2023)
Dryland salinity affects over 2.5 M ha in Australia, mostly in southern states and is expanding at 3-5% per year (NLWRA, 2001). The prognosis is for considerable expansion of the area affected by salinity and waterlogging (1217 M ha at equilibrium), because groundwater levels continue to rise and only small-scale land management programmes have been implemented. In addition, many waterways are increasingly saline, especially in the Murray Darling Basin and in Western Australia (WA). Sustainable Grazing on Saline Land (SGSL) addresses the need to make productive use of saline land and water resources. Its research component operates at 12 sites …
Growth Characteristics Of Kikuyu Grass With Different Sources And Doses Of Phosphorus, José C. Pinto, Í. P. A. Santos, A. E. Furtini Neto, A. R. Morais, E. E. Mesquita, D. J. G. Faria, I. F. Andrade
Growth Characteristics Of Kikuyu Grass With Different Sources And Doses Of Phosphorus, José C. Pinto, Í. P. A. Santos, A. E. Furtini Neto, A. R. Morais, E. E. Mesquita, D. J. G. Faria, I. F. Andrade
IGC Proceedings (1977-2023)
Growth is defined as the increase in size, volume and mass as a function of time. Growth analysis allows evaluating the final growth of the plant as a whole and the contribution of the different organs in total growth (Benincasa, 1988). The experiment had as objective to evaluate specific leaf area (SLA), leaf area per unit of leaf DM, leaf area ratio (LAR), leaf area per unit of whole plant DM, leaf weight ratio (LWR), leaf weight per unit of plant weight, leaf area index (LAI), leaf area per unit of soil area, leaf/stem ratio (LSR), leaf weight per unit …
Effects Of Soil Compaction By Animal Trampling On Growth Of Agropyron Repens, M. R. Chaichi, B. Ataeian, M. Mohseni Saravi
Effects Of Soil Compaction By Animal Trampling On Growth Of Agropyron Repens, M. R. Chaichi, B. Ataeian, M. Mohseni Saravi
IGC Proceedings (1977-2023)
Animal trampling is the most important factor that increases soil compaction beyond the soil elastic property in rangelands under heavy grazing intensities (Lull, 1959). The complicated ecological interactions in a rangeland ecosystem make it difficult to predict the impact of trampling under different conditions. However, soil properties and vegetation composition are sensitive to different grazing management practices. This research, which was carried out in simulated conditions, sought to establish the contribution of soil compaction resulting from animal trampling over a long period to the decline in rangeland condition.
Effect Of Fertilisation With Macro And Micronutrients On The Mineral Content Of Leucaena Leucocephala, S. Camacaro
Effect Of Fertilisation With Macro And Micronutrients On The Mineral Content Of Leucaena Leucocephala, S. Camacaro
IGC Proceedings (1977-2023)
The Venezuelan cattle industry has been developed in areas with soil limitations, causing a negative impact on animal production, since the pastures are of medium to low quality and quick maturation (Chacón, 1996). On the other hand, forage legumes have been introduced to improve the nutritive value of the biomass on offer. Growing interest has been shown in Leucaena leucocephala in recent years due to its multiple benefits (Duguma et al., 1988). However the use of varieties not adapted to acid soils can be a problem, largely due their low tolerance to the toxicity of the aluminium and to …
Forage Quality And Yield Of Berseem Clover And Annual Ryegrass Grown In Pure And Mixed Stands In Relation To Different N Application Rates, C. Scarpello, L. Stringi, G. Amato, D. Giambalvo, P. Trapani, C. Attardo
Forage Quality And Yield Of Berseem Clover And Annual Ryegrass Grown In Pure And Mixed Stands In Relation To Different N Application Rates, C. Scarpello, L. Stringi, G. Amato, D. Giambalvo, P. Trapani, C. Attardo
IGC Proceedings (1977-2023)
Grass-legume mixtures offer several advantages over monocultures in forage-animal production systems (Haynes, 1980). In fact, in grass-legume mixtures forage yield and quality are generally higher compared to grass monocultures also due to more efficient soil N-utilisation (Ta & Faris, 1987); furthermore grasses often utilise some of the N fixed by legumes (Malhi et al., 2002). Legumes do not generally require the addition of N fertiliser due to symbiotically fixed N, but the yield of the grass component in a mixture may be further improved with N application. The objective of this study was to investigate forage yield and quality …
Effect Of Different Phosphorous Sources And Levels On The Productive Behaviour Of A Lotus Pedunculatus Cv. Grasslands Maku Oversown Pasture, R. E. Bermúdez, W. Ayala
Effect Of Different Phosphorous Sources And Levels On The Productive Behaviour Of A Lotus Pedunculatus Cv. Grasslands Maku Oversown Pasture, R. E. Bermúdez, W. Ayala
IGC Proceedings (1977-2023)
The organic meat production protocol of Uruguay (INAC, 2003) requires that the animals graze pastures that receive no chemical fertilisers. The oversown legume pastures in Uruguay used to be fertilised with soluble phosphorous (P) sources that are not accepted by the protocol. The relative efficiency of different P sources would be useful data for farmers. This information is not available for the acid soils of the eastern region of Uruguay. Lotus pedunculatus cv. Grasslands Maku is one of the most adapted legumes to be included in this type of pasture, as the sown area has increased in the last few …
Effects Of Sowing Date And Phosphorus Fertiliser Application On Winter Survival Of Lucerne Cv. Aohan In The Northern Semi-Arid Region Of China, Z. L. Wang, Q. Zh. Sun, Y. W. Wang, Zh. Y. Li, Sh. F. Zhao
Effects Of Sowing Date And Phosphorus Fertiliser Application On Winter Survival Of Lucerne Cv. Aohan In The Northern Semi-Arid Region Of China, Z. L. Wang, Q. Zh. Sun, Y. W. Wang, Zh. Y. Li, Sh. F. Zhao
IGC Proceedings (1977-2023)
In the northern semi-arid region of China, winter survival is always a limiting factor for lucerne production, because low temperatures and a dry climate in winter (Zhou et al., 1993; Ma, 2000; Sun & Gui, 2001; Sun et al., 2003). An experiment was conducted to find an appropriate sowing date and P application rate in order to improve lucerne winter survival.
Effect Of Animal Manure On Forage Yield And Quality Of Pangolagrass And Soil Fertility, Fu‐Hsing Hsu, Kuoyuan Hong, C. H. Hsieh
Effect Of Animal Manure On Forage Yield And Quality Of Pangolagrass And Soil Fertility, Fu‐Hsing Hsu, Kuoyuan Hong, C. H. Hsieh
IGC Proceedings (1977-2023)
Animal wastes may cause environmental pollution. Lu & Hsu (2004) reported that N utilisation in the manure by pangolagrass was 10-28%. Objectives of this study were to determine the effect of animal manure on forage yield and quality of pangolagrass and soil fertility.
Effect Of Mineral Fertiliser Levels On The Yield Quality Of Perennial Ryegrass, S. R. Bumane, Aleksandr Adamovich
Effect Of Mineral Fertiliser Levels On The Yield Quality Of Perennial Ryegrass, S. R. Bumane, Aleksandr Adamovich
IGC Proceedings (1977-2023)
Perennial ryegrass is a short-lived bunch-grass with shallow root system. The plant is nutritious and palatable and stands up to hard grazing. It will not do well under poor conditions, where fertility or rainfall is low. Perennial ryegrass is a major component in different seed mixtures that are used for grassland management and forage production. This plant is the predominant component in nearly all pasture mixtures, with perennial ryegrass and white or red clover forming the basis for permanent pasture for dairy production and cattle. This grass species plays an important role in grassland productivity and forage quality. Ryegrass requires …
Supplementation Of Cattle With Rock Phosphate And Urea Treated Straw To Improve Manure Quality And Crop Yields In The Sahel Zone Of Senegal, Maimouna Cissé, M. N’Diaye, C. M. N'Dione
Supplementation Of Cattle With Rock Phosphate And Urea Treated Straw To Improve Manure Quality And Crop Yields In The Sahel Zone Of Senegal, Maimouna Cissé, M. N’Diaye, C. M. N'Dione
IGC Proceedings (1977-2023)
Mineral deficiencies are a major constraint in improving animal production and crop yield in the Sahel zone (Cissé et al., 1996). Millet (Pennisetum glaucum) and groundnut (Arachis hypogaea) are two major food and cash crops in this zone. The purpose of this study was to assess effects of supplementing grazing cattle with rock phosphate and nitrogen enriched diets on animal performances, and the effects of the application of their manure on crop yield in a pearl millet-groundnut rotational system located in N Senegal.
Nitrogen Balance And Soil Nitrates In Suckler Cow Pastures Fertilised With Mineral Fertiliser, Pig Slurry Or Cattle Compost, Isabelle Dufrasne, J. F. Cabaraux, L. Istasse, J. L. Hornick
Nitrogen Balance And Soil Nitrates In Suckler Cow Pastures Fertilised With Mineral Fertiliser, Pig Slurry Or Cattle Compost, Isabelle Dufrasne, J. F. Cabaraux, L. Istasse, J. L. Hornick
IGC Proceedings (1977-2023)
A code of good practice was established by each European member state according to the EU Nitrate Directive. In Belgium, the nitrogen (N) inputs on pastures from slurry or compost are limited to 210 kg N/ha. Bigger quantities can be applied if the farmer follows a programme of additional measurements, including soil nitrate (NO3) analysis. This investigation aimed to measure animal performance, N balance and soil NO3 in pastures fertilised with mineral N, pig slurry or cattle compost, the pastures being grazed by Belgian Blue cows and their calves.
Reducing Soil Phosphorus Buildup From Animal Manure Application, G. W. Evers
Reducing Soil Phosphorus Buildup From Animal Manure Application, G. W. Evers
IGC Proceedings (1977-2023)
Animal manure is an excellent plant nutrient source for pastures but increasing soil P level over time is a major environmental problem (Sims et al., 1998). The increase in residual soil P is due to the difference in N-P ratio in the manure and forage crop requirements (Robinson, 1996). All the N in animal manure is normally utilised but only from 20 to 40% of the P is taken up. With moderate rates of manure application, nitrogen becomes the limiting nutrient for grasses. The objective of this study was to see if combining commercial N fertiliser with broiler litter …
Effects Of Nitrogen Fertiliser On Nitrate Leaching And Production Of Autumn-Sown Italian Ryegrass In A Double-Cropping System On A New Zealand Dairy Farm, Errol R. Thom, A. A. Judge, R. N. Jensen, M. S. Sprosen, Sterwart F. Ledgard, W. D. Catto
Effects Of Nitrogen Fertiliser On Nitrate Leaching And Production Of Autumn-Sown Italian Ryegrass In A Double-Cropping System On A New Zealand Dairy Farm, Errol R. Thom, A. A. Judge, R. N. Jensen, M. S. Sprosen, Sterwart F. Ledgard, W. D. Catto
IGC Proceedings (1977-2023)
On intensive dairy farms in New Zealand, winter Italian ryegrass crops are combined with summer maize silage crops in double-cropping systems. Limited data (Davies & Neilson, 1975) showed variable ryegrass yield responses to nitrogen (N) fertiliser when grown after maize. Nitrogen leaching losses were not measured in this experiment but Ledgard et al. (1988) showed that late autumn/early winter N applications are vulnerable to leaching. Different rates of N fertiliser were applied to Italian ryegrass grown after maize to assess yield responses and levels of nitrate leaching.
Nitrogen And Phosphorus Losses In Runoff On Beef Production Systems, Marta Alfaro, F. J. Salazar, N. G. Teuber, S. P. Iraira, L. A. Ramirez
Nitrogen And Phosphorus Losses In Runoff On Beef Production Systems, Marta Alfaro, F. J. Salazar, N. G. Teuber, S. P. Iraira, L. A. Ramirez
IGC Proceedings (1977-2023)
In West Europe countries between 37 and 82% of the nitrogen (N) and between 27 and 38% of the phosphorus (P) reaching water sources come from agriculture and a strong correlation between the number of animals per area unit and N and P contribution to waters has been shown (Issermann, 1990). There are few data about the environmental impact of beef production systems in Southern Chile. The objective of this experiment was to quantify N and P losses in runoff (surface and subsurface) with two different stocking rates in Southern Chile.
Effect Of Long-Term Nutrient Management Strategies For Pastures On Phosphorus In Surface Runoff And Soil Quality, G. L. Mullins, J. P. Fontenot, G. A. Alloush, G. Johnson, D. G. Boyer, V. G. Allen, G. Scaglia
Effect Of Long-Term Nutrient Management Strategies For Pastures On Phosphorus In Surface Runoff And Soil Quality, G. L. Mullins, J. P. Fontenot, G. A. Alloush, G. Johnson, D. G. Boyer, V. G. Allen, G. Scaglia
IGC Proceedings (1977-2023)
Manure, whether mechanically applied or deposited by grazing animals, has been associated with increased risk of non-point source pollution, especially phosphorus. This is especially true in areas where the industry, especially poultry, has been concentrated in geographical areas that are grain deficient, resulting in a reliance on imported grain for poultry feed. Intensification has resulted in the production of large quantities of poultry manure, within relatively small geographical areas. Surplus litter is typically land applied as a nutrient source or used as an animal feed. The objective of this project was to evaluate the effects of long-term nutrient management strategies …
Increase In Forage Maize Production By Bacterial Fertilisers, D. Egamberdiyeva, G. Hoflich
Increase In Forage Maize Production By Bacterial Fertilisers, D. Egamberdiyeva, G. Hoflich
IGC Proceedings (1977-2023)
Farmers in many countries value green material generated from maize as a high quality forage. Its inclusion in dairy cow diets can improve forage intake, increase animal performance and has the potential to reduce production costs (Phipps, 1994). Restrictions on the use of chemical fertilisers and a renewed interest in organic sustainable farming systems in general, has restored attention to crop rotations The increase of maize production using bacterial fertilisers also gives alternative ways to reduce chemical fertilisers in forage production. Increased uptake of nutrients such as N, P, and K and crop yield was reported with rhizobacteria (Lazarovits & …
Soil Organic Matter Along A Degradation Gradient In A Semi-Arid Rangeland Of South Africa, Chris C. Du Preez, Hennie A. Snyman
Soil Organic Matter Along A Degradation Gradient In A Semi-Arid Rangeland Of South Africa, Chris C. Du Preez, Hennie A. Snyman
IGC Proceedings (1977-2023)
In a semi-arid South Africa rangeland on a sandy loam soil, artificial manipulations to create various rangeland conditions typical of different levels of livestock impact were shown to result in considerable losses of organic matter after 15 years (Du Preez & Snyman, 1993). In this follow-up study on a similar soil, we regularly measured the organic matter content following the conversion of rangeland in a good to a poor ecological condition, an undisturbed bare soil and a cultivated soil respectively. The changes in soil organic matter content after five years are reported.
Soil Microbial Diversity Of An Artificial Caragana Korshinskii Plantation On The Loess Plateau Of China, W. Zhang, H. L. Wei, H. W. Gao, Y. G. Hu
Soil Microbial Diversity Of An Artificial Caragana Korshinskii Plantation On The Loess Plateau Of China, W. Zhang, H. L. Wei, H. W. Gao, Y. G. Hu
IGC Proceedings (1977-2023)
Peashrub (Caragana korshinskii) is an important dune-fixation plant on the loess plateau of China and is valuable in ecological environment construction of North-western China. For determining relationships between peashrub and soil microbes, three clone libraries of 16S rDNA from rhizoplane, rhizosphere and bulk soil communities of peashrub were constructed with a culture-independent approach. The data obtained from three clone libraries were used to investigate the magnitude of vegetative changes in the microbial community, and to search for general ecological relationships.
Grazing Effects On Some Soil Characteristics In Lar Rangelands, S. A. Javadi, M. Jafari, Gh. Zahedi
Grazing Effects On Some Soil Characteristics In Lar Rangelands, S. A. Javadi, M. Jafari, Gh. Zahedi
IGC Proceedings (1977-2023)
Heavy grazing pressures jeopardise the sustainability of the ecosystem by reducing soil fertility (Dormaar et al., 1998). Different results have been reported of grazing intensities on soil chemical properties, which stem from climate, soil, vegetation, management and kind of animal (Dormaar et al., 1998; Javadi, 2003; Sanadgool, 2002).
Accumulation And Decomposition Rates And N, P And K Returned To The Soil By The Litter Of Tropical Legumes And Grasses, Gustavo Crespo, I. Rodríguez, M. F. Días, Sandra Lok
Accumulation And Decomposition Rates And N, P And K Returned To The Soil By The Litter Of Tropical Legumes And Grasses, Gustavo Crespo, I. Rodríguez, M. F. Días, Sandra Lok
IGC Proceedings (1977-2023)
The return of plant nutrients through litter decomposition of legumes and grasses is important for the sustainability of grassland ecosystems (Sánchez et al., 1989). Therefore, the selection of species that produce high amounts of decomposable litter is important . The objective of the present work was to study the production and decomposition rates of litter from various legumes and grasses in Cuba.
Validation Of The Software “Recycling Of Nutrients” In Dairy-Farms Of Western Cuba, I. Rodríguez, Gustavo Crespo, M. F. Días, S. Fraga
Validation Of The Software “Recycling Of Nutrients” In Dairy-Farms Of Western Cuba, I. Rodríguez, Gustavo Crespo, M. F. Días, S. Fraga
IGC Proceedings (1977-2023)
To maintain a good productivity in the soil-plant-animal system it is necessary to achieve an equilibrium between input and output of nutrients and energy. Models and simulation software have been proposed for this purpose. For dairy farms, models have been utilised to show the behaviour of different aspects, such as: feed utilisation, energy flow, digestibility values and daily weight gains (Freer et al., 1970; Assis & France, 1983, Bruce et al., 1984). However, there are few models showing the interaction between soil-plant- animal components of these systems. The objective of the present study was to validate the software …