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Articles 2341 - 2370 of 12002

Full-Text Articles in Physical Sciences and Mathematics

Potential Biological Control Agents For Nassella Neesiana (Poaceae) Invading Australian Native Grasslands, F. E. Anderson, M. L. Díaz, D. A. Mclaren Jun 2023

Potential Biological Control Agents For Nassella Neesiana (Poaceae) Invading Australian Native Grasslands, F. E. Anderson, M. L. Díaz, D. A. Mclaren

IGC Proceedings (1993-2023)

The introduction and proliferation of exotic stipoid grasses over the past 100 years seriously threatens agricultural productivity and the integrity of Australia's indigenous flora and fauna, particularly its grasslands (McLaren et al., 1998). The full effect on biodiversity by the spread of these grasses is unknown but likely to be major (Hocking, 1998). Conventional control techniques have not stopped the invasion adequately, so it is a priority to find control options to achieve an effective management strategy. A biological control project against Nassella trichotoma and N. neesiana was initiated in 1999 in Argentina. We report on the most recent …

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Density And Germination Characteristics Of Seeds Of Bromus Tectorum In Field Seedbanks, J. A. Young, Charlie D. Clements Jun 2023

Density And Germination Characteristics Of Seeds Of Bromus Tectorum In Field Seedbanks, J. A. Young, Charlie D. Clements

IGC Proceedings (1993-2023)

Bromus tectorum is a highly invasive exotic weed that has spread over millions of hectares of grazing land in the semi-arid regions of far western North America. The annual grass is an important grazing resource, but herbage production is highly variable among years, depending on the amount and periodicity of precipitation. When production is abundant, the accumulations of fine-textured, early-maturing herbage increase the chance of ignition and the rate of spread of wildfires. On certain years the area burned in such fires may be several million hectares. Such fires destroy forage resources and degrade watershed quality on extensive areas as …

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Perennial Grass Emergence And Establishment Using A Micro-Nutrient Seed Treatment, Charlie D. Clements, J. A. Young Jun 2023

Perennial Grass Emergence And Establishment Using A Micro-Nutrient Seed Treatment, Charlie D. Clements, J. A. Young

IGC Proceedings (1993-2023)

Resource managers have become increasingly frustrated with restoration seeding failures in semi-arid and arid environments. In response to this frustration, some resource managers have attempted restoration seedings using non-conventional methodologies such as propriety seed treatments. The exact nature of these propriety treatments is often confidential, but they generally consist of either nutrient or micro-nutrient enrichment or inoculation with unspecified micro-organisms. One of the more popular propriety seed treatment used in Nevada, USA, is GERM-N-8®. This product is a suspension of nutrients (N 2%, P 14%, and K 3%) applied to dry seed. Resource managers often report excellent success using these …

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Comparative Seed Strike Of Temperate, Sub-Tropical And Native Grasses And Herb Species Under Contrasting Environments In Southern Australia, Zhongnan Nie, K. F. M. Reed, F. Cameron, B. Clark Jun 2023

Comparative Seed Strike Of Temperate, Sub-Tropical And Native Grasses And Herb Species Under Contrasting Environments In Southern Australia, Zhongnan Nie, K. F. M. Reed, F. Cameron, B. Clark

IGC Proceedings (1993-2023)

The role of deep-rooted perennials in reducing recharge to mitigate dryland salinity has been recognised widely in Australia recently. Poor seedling establishment is a key limiting factor for the expression of genetic merit for some perennial pasture species. Nie et al. (2004) investigated seedling establishment, and its relationship with rainfall and temperature, of a range of perennial grass and herb species in southern Australia. This paper reports seed strike of a range of perennial pasture species in 2 contrasting environments. There was significant interaction between species and site on seed strike. Environmental conditions caused different establishment outcomes within a …

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Forage Yield And Seed Bank Production With New Annual Legumes For The Dryland Conditions In The Araucanía Region In The South Of Chile, O. Romero, A. Catrileo, C. Rojas, S. Loi Jun 2023

Forage Yield And Seed Bank Production With New Annual Legumes For The Dryland Conditions In The Araucanía Region In The South Of Chile, O. Romero, A. Catrileo, C. Rojas, S. Loi

IGC Proceedings (1993-2023)

In dryland areas of the IX Region of Chile, with a dry period of 150 days with a negative hydrologic balance beef production is based on natural pasture, with low P soils, which produces a low DM yield. The sown pasture for this area is fescue in mixture with subclover. The subclover, has persistence problems and erratic production (Romero & Rojas, 2001). Hard seeded serradella (Ornithophus compressus), soft seeded serradella (O.sativus) and biserrula (Biserrula pelecinus) are annual forage legumes and well adapted to low P levels in the soil (Oram, 1990). The objectives of …

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Grass Pellet Bioenergy In The Northeastern Usa, J. H. Cherney, D. J. R. Cherney Jun 2023

Grass Pellet Bioenergy In The Northeastern Usa, J. H. Cherney, D. J. R. Cherney

IGC Proceedings (1993-2023)

Grass pellets are a renewable energy supply that combines low technology/small-scale with local production/consumption for a cost effective energy system. There have been significant recent advances in pellet furnace technology and some pellet stove manufacturers now claim their stoves are capable of burning biomass with 5-6% ash content. Cool-season grasses have not been considered acceptable for pelleting and direct combustion in the past due to high ash content. Rain after harvest, however, has been shown to leach significant amounts of potassium and chlorine from grass (Sander, 1997). High yields are possible under lax harvest management (Cherney et al., 2003), producing …

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Australian Pasture Systems: The Perennial Compromise, L. W. Bell, M. A. Ewing Jun 2023

Australian Pasture Systems: The Perennial Compromise, L. W. Bell, M. A. Ewing

IGC Proceedings (1993-2023)

Dryland salinity, soil acidification and weed herbicide resistance challenge traditional agricultural production systems in south Australia. The pasture component of such systems rely on annuals like Trifolium subterraneum and Medicago spp. Replacing annual with perennial pastures allows some redress of the sustainability challenges, but few well-adapted species are available (Ewing & Dolling 2003). A range of perennial species are under evaluation to supplement current options. Some of these new perennial pastures may need modified production systems that allow full expression of their productive potential, especially when integrated with annual crops including cereals, pulses and oil seeds. Integrated systems rely on …

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Evaluation With Simulation Of Lucerne-Based Cropping Systems To Combat Dryland Salinity In Australia, W. Chen, M. J. Robertson, William D. Bellotti Jun 2023

Evaluation With Simulation Of Lucerne-Based Cropping Systems To Combat Dryland Salinity In Australia, W. Chen, M. J. Robertson, William D. Bellotti

IGC Proceedings (1993-2023)

Dryland salinity is one of the most significant forms of land degradation that farmers face in Australia. There are currently 2.5 million ha affected by dryland salinity in Australia, and this may rise to 15 million ha over the next 30 to 100 years if no action is taken. National field experiments suggest that adoption of cropping systems that integrate deep-rooted perennials, such as lucerne, are important to reduce dryland salinity. This paper reports simulation results with APSIM (The Agricultural Production Systems Simulator), that have been used to explore climate, soil and agronomic factors affecting effectiveness of lucerne-based phase and …

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Response Of Guinea Grass (Panicum Maximum Jacq) To Application Of Cow Dung In South West Nigeria, Olufemi S. Onifade, Jimoh A. Olanite, Alaba O. Jolaosho, O. M. Arigbede, N. K. Tijani Jun 2023

Response Of Guinea Grass (Panicum Maximum Jacq) To Application Of Cow Dung In South West Nigeria, Olufemi S. Onifade, Jimoh A. Olanite, Alaba O. Jolaosho, O. M. Arigbede, N. K. Tijani

IGC Proceedings (1993-2023)

The yield of forage species from the world's grazing land is limited by poor soil and unproductive species (Jones & Wild, 1975; Cooke, 1982). The use of manure on pasture land not only represents a low cost disposal method but also a means of recycling nutrients for plant growth and counteracting the decreasing organic matter content in most agricultural soils. In agro-pastoral production systems, the interaction between crops and livestock is important. Manures are used mainly to complement inorganic fertiliser in the production of food crops. There is a dearth of information on the response of pasture grass to application …

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Riparian Management In Intensive Grazing Systems For Improved Biodiversity And Environmental Quality: Productive Grazing, Healthy Rivers, S. R. Aarons, M. Jones-Lennon, P. Papas, N. Ainsworth, F. Ede, J. Davies Jun 2023

Riparian Management In Intensive Grazing Systems For Improved Biodiversity And Environmental Quality: Productive Grazing, Healthy Rivers, S. R. Aarons, M. Jones-Lennon, P. Papas, N. Ainsworth, F. Ede, J. Davies

IGC Proceedings (1993-2023)

Within high rainfall intensive grazing systems of southern Victoria, riparian zones are often degraded due to vegetation clearing, stock access and inappropriate farm management. Streams in these landscapes often have poor water quality and reduced biodiversity due to degraded terrestrial and aquatic ecosystems. Improved management of riparian zones depends on developing tools and practices for integration into productive grazing systems. This paper describes the approaches used and the tools developed in the 'Productive Grazing, Healthy Rivers: Improving riparian and in-stream biodiversity' project

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A Comparison Of N2O Emissions After Application Of Dairy Slurry On Perennial Grass Or Bare Soil Prior To Planting An Annual Crop In Coastal British Columbia, Canada, Shabtai Bittman, C. G. Kowalenko, A. Friesen, D. E. Hunt Jun 2023

A Comparison Of N2O Emissions After Application Of Dairy Slurry On Perennial Grass Or Bare Soil Prior To Planting An Annual Crop In Coastal British Columbia, Canada, Shabtai Bittman, C. G. Kowalenko, A. Friesen, D. E. Hunt

IGC Proceedings (1993-2023)

Because of restrictions on land application of manure in autumn and winter, dairy farmers in coastal British Columbia (BC) must apply half of their annual manure supply from mid-Feb. to mid-April. Although two thirds of their land is in perennial grass, most of this manure is applied to bare soil, usually maize land, prior to planting. This is done for convenience and to avoid damaging grass stands with equipment traffic. Farmers are encouraged to allocate more manure to grass to minimise soil NO3 concentrations after maize harvest, because maize takes up less N than grass, and the bare fields …

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Effect Of Temporary Grasslands Of Different Age, Composition And Management On Winter Wheat Yields In A Crop Rotation, B. Deprez, R. Lambert, A. Peeters Jun 2023

Effect Of Temporary Grasslands Of Different Age, Composition And Management On Winter Wheat Yields In A Crop Rotation, B. Deprez, R. Lambert, A. Peeters

IGC Proceedings (1993-2023)

Organic nitrogen (N) accumulates in the soil in temporary grasslands. This accumulation is especially important when mineral N fertilisation is high. Legume-based temporary grasslands may also supply the soil with nitrogen through fixation of atmospheric N, for instance in organic farming. When ploughing temporary grassland, great amounts of mineral nitrogen can be released through the process of decomposition and mineralisation of soil organic matter. This mineral nitrogen can be taken up by succeeding crops. The aim of this experiment was to evaluate the effect of temporary grasslands of different ages, N fertilisation levels and legume contents on winter wheat yields …

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Black Medick - A Beneficial Companion Crop For Use In Organic Grass Production, R. Macháč, B. Cagaš Jun 2023

Black Medick - A Beneficial Companion Crop For Use In Organic Grass Production, R. Macháč, B. Cagaš

IGC Proceedings (1993-2023)

Organic farmers must use only organically produced seed for establishing new meadows and for, renovation and undersowing of old pastures, in accordance with EC regulations. Therefore an important and difficult goal is to obtain enough seed of grasses without the use of pesticides and inorganic fertilisers. The seed yield is closely related to the number of fertile tillers, which depends on adequate nitrogen in the soil. Growing grasses for seed with a legume, as a companion crop, is one possibility for providing a source of organic nitrogen. Aamlid (1999) claimed that growing timothy together with white clover or alsike clover …

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The Suitability For Organic Cattle Beef Production Of Mixed Farming Systems In The Highlands Of North East Portugal, J. M. Pires, M. Rodrigues, F. Sousa, A. Bernardo, J. C. Pires, J. Cabanas, H. Resendes, M. J. Ferreira, M. I. Silva, N. Moreira Jun 2023

The Suitability For Organic Cattle Beef Production Of Mixed Farming Systems In The Highlands Of North East Portugal, J. M. Pires, M. Rodrigues, F. Sousa, A. Bernardo, J. C. Pires, J. Cabanas, H. Resendes, M. J. Ferreira, M. I. Silva, N. Moreira

IGC Proceedings (1993-2023)

The EC Reg. 1804/99 takes account of animal production in organic farming. However, these specifications may limit implementation and expansion of organic animal production, due to environmental and system constraints. Mixed farming, as defined by Spedding (1988) and Grigg (1996), is commonly practiced in the NE highlands of Portugal. Two farms were studied in this region in order to evaluate their suitability for organic cattle beef production, taking account of the technical specifications of the EC regulation.

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Implications Of Land Use Changes On The Yields In Dry Matter, Energy And Protein Of Range And Crop Fields In Zamfara Reserve, Northwestern Nigeria, B. S. Malami, P. H. Y. Hiernaux, H. M. Tukur, B. Rischkowsky Jun 2023

Implications Of Land Use Changes On The Yields In Dry Matter, Energy And Protein Of Range And Crop Fields In Zamfara Reserve, Northwestern Nigeria, B. S. Malami, P. H. Y. Hiernaux, H. M. Tukur, B. Rischkowsky

IGC Proceedings (1993-2023)

The Zamfara reserve is a 235,500 ha grazing land within the Sudan savannah zone (12º 10' - 13º 05 N; 6º 30' - 7º15' E) of north western Nigeria. Rainfall varies from 500mm in the north to 800mm in the south of the reserve, and is restricted within the months of May - September. The reserve is an important grazing site for the herds of sedentary, transhumant and agro pastoralists. Population growth within the farming communities in the reserve has led to the conversion of more grazing land to croplands. This work was carried out to evaluate the quantity and …

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Effect Of Dairy Effluent On Turnip Yields, Joe L. Jacobs, G. N. Ward, Frank R. Mckenzie Jun 2023

Effect Of Dairy Effluent On Turnip Yields, Joe L. Jacobs, G. N. Ward, Frank R. Mckenzie

IGC Proceedings (1993-2023)

Dairy effluent is a significant point source in the pollution of waterways. Only 50% of dairy farms in the dryland regions of Victoria, Australia, have suitable dairy effluent systems of which only 25% are managed effectively (IRIS Research 2000). Despite many farmers viewing effluent as an undesirable waste, it contains relatively large amounts of agronomically valuable nutrients especially nitrogen (N) and potassium (K). Results are reported from the first two years of a three year study comparing turnip leaf and root dry matter (DM) responses to a range of dairy effluent rates.

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Nitrogen Use Efficiency Of Specialized Dairy Farms In Flanders: Evolution And Future Goals, Frank Nevens, I. Verbruggen, M. Meul, D. Reheul Jun 2023

Nitrogen Use Efficiency Of Specialized Dairy Farms In Flanders: Evolution And Future Goals, Frank Nevens, I. Verbruggen, M. Meul, D. Reheul

IGC Proceedings (1993-2023)

Efficient use of nutrients is one of the major aims of eco-efficient and sustainable agricultural production systems. We determined the nitrogen use efficiency of a representative set of specialised dairy farms in Flanders, between 1989-1990 and 2000-2001 and set achievable eco-efficiency targets for sustainability.

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Production Systems To Integrate Livestock Grazing And Grain Production In Southern Brazil And Midwestern Usa, R. Mark Sulc, A. Moraes, S. J. Alves, A. Pelissari, Paulo C. De F. Carvalho, C. R. Lang Jun 2023

Production Systems To Integrate Livestock Grazing And Grain Production In Southern Brazil And Midwestern Usa, R. Mark Sulc, A. Moraes, S. J. Alves, A. Pelissari, Paulo C. De F. Carvalho, C. R. Lang

IGC Proceedings (1993-2023)

Agriculture in the USA and Brazil has undergone similar and dramatic changes in the past 20 years. In both countries, production systems have become increasingly specialized. Large farms are characterized by single enterprises, simple crop rotations, and livestock production is segregated from grain production. The lack of diversification and high production costs expose producers to risk from economic swings of single enterprises and greater reliance on pesticides and synthetic fertilizers to maintain profitability, along with greater risk of soil erosion from continuous row crop production. Scientists in southern Brazil and Ohio are collaborating to develop no-tillage systems that integrate livestock …

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Seed Size And Its Relationship With Crop Establishment, Productivity And Nutritive Value In Genotypes Of Maize For Silage, C. Pérez, M. R. Tovar G., G. García, A. Carballo, G. Mendoza, T. Vásquez, F. González, M. Crosby Jun 2023

Seed Size And Its Relationship With Crop Establishment, Productivity And Nutritive Value In Genotypes Of Maize For Silage, C. Pérez, M. R. Tovar G., G. García, A. Carballo, G. Mendoza, T. Vásquez, F. González, M. Crosby

IGC Proceedings (1993-2023)

For a high dry matter (DM) yield of forage maize an adequate population of plants is required, which is related to germination, vigour, and seed size (Ellis, 1992). The objective of the present study was to investigate seed size and its relationship to establishment, productive and nutritional potential of silage maize, which has not before been reported in the literature.

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Comparison Of Technologic And Economic Parameters Of Drills For Grassland Oversowing, Lubomir Gonda, M. Kunský Jun 2023

Comparison Of Technologic And Economic Parameters Of Drills For Grassland Oversowing, Lubomir Gonda, M. Kunský

IGC Proceedings (1993-2023)

Direct grassland oversowing is a very important technology in Slovakia as some 350,000 ha (42 %) of grassland are on unploughable sites that dominate mountain regions. Slope inclinations > 16° and shallow soil layers (150-200mm) limits ploughing on these sites (Tiley & Frame, 1988).

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Repeated Strip-Seeding Of A Legume-Grass Mixture Into Permanent Grassland In The Czech Republic, A. Kohoutek, P. Komárek, V. Odstrčilová, P. Nerušil Jun 2023

Repeated Strip-Seeding Of A Legume-Grass Mixture Into Permanent Grassland In The Czech Republic, A. Kohoutek, P. Komárek, V. Odstrčilová, P. Nerušil

IGC Proceedings (1993-2023)

Although ruminants do not belong to the main consumers of protein supplements, there is a possibility to decrease the use of feed grain by increasing the protein content in the forage from permanent grassland. This paper describes strip-sowing of a legume-grass mixture. Saved protein supplements can then be used for feeding pigs and poultry.

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Strip-Seeding Of Red Clover, Lucerne, Alsike Clover, White Clover And Sainfoin Into Grassland In Central Europe, P. Komárek, A. Kohoutek, V. Odstrčilová, P. Nerušil Jun 2023

Strip-Seeding Of Red Clover, Lucerne, Alsike Clover, White Clover And Sainfoin Into Grassland In Central Europe, P. Komárek, A. Kohoutek, V. Odstrčilová, P. Nerušil

IGC Proceedings (1993-2023)

Strip-seeding of legumes into grassland improves forage quality and adds fixed nitrogen (N) to grassland, which decreases the need for mineral N.

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Persistence Of Timothy In Mixture With Smooth Meadow Grass, H. Björnsson Jun 2023

Persistence Of Timothy In Mixture With Smooth Meadow Grass, H. Björnsson

IGC Proceedings (1993-2023)

Timothy (Phleum pratense) is the most common grass species in Iceland for the production of high quality herbage for dairy cows. For this purpose timothy is cut early, often around heading. The high quality, however, is at the cost of limited persistence of timothy. If cut late, three to four weeks after heading, timothy cultivars of northern origin can sometimes dominate for a long time, especially if the aftermath is not cut or grazed. Earlier experiments have shown that, relative to a late cutting treatment, the percentage timothy in the first harvest is reduced by one unit for …

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Improvement Of Lucerne Cutting Management: The Relative Impact Of Initial Organic Reserves, Cutting Height And Residual Leaf Area On Forage Yield, J. C. Avice, F. Meuriot, M. L. Decau, A. Morvan-Bertrand, M. P. Prud'homme, F. Gastal, J-C. Simon, J. J. Volenec, A. Ourry Jun 2023

Improvement Of Lucerne Cutting Management: The Relative Impact Of Initial Organic Reserves, Cutting Height And Residual Leaf Area On Forage Yield, J. C. Avice, F. Meuriot, M. L. Decau, A. Morvan-Bertrand, M. P. Prud'homme, F. Gastal, J-C. Simon, J. J. Volenec, A. Ourry

IGC Proceedings (1993-2023)

Less lucerne (Medicago sativa L.) is now grown because of difficulties arising from 2 interacting characteristics: productivity and stand persistence. Optimisation of these two parameters depends highly of the cutting management (cutting height and/or frequency) and of the taproot N reserves. For example, Avice et al. (1997) showed that lucerne shoot regrowth is relates closely to taproot soluble protein concentrations (especially vegetative storage protein: VSP). However, it is not known how stubble C-N reserves and/or residual leaf area (both depending of the cutting management) influence the contribution of taproot reserve-derived C-N supply to regrowing lucerne shoots after defoliation. …

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The Effect Of Sowing Date And Autumn Management On Sainfoin (Onobrychis Viciifolia) Regrowth And Yield, Z. G. (Zhigang) Liu, G. P. F. Lane Jun 2023

The Effect Of Sowing Date And Autumn Management On Sainfoin (Onobrychis Viciifolia) Regrowth And Yield, Z. G. (Zhigang) Liu, G. P. F. Lane

IGC Proceedings (1993-2023)

Due to its characteristics (palatability, non-bloating, high protein, high voluntary intake etc.: Frame, 1998), sainfoin was a traditional forage legume in the UK, grown widely during the 17-19th century (Bland, 1971). It has almost disappeared in recent years. The rise of organic farming and the need for home-grown protein may encourage the return of sainfoin. This experiment aimed to explore the impact of sowing date and autumn management on the growth and yield of sainfoin in UK.

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Rangelands In The Mediterranean Zone Of Croatia, J. Rogosic Jun 2023

Rangelands In The Mediterranean Zone Of Croatia, J. Rogosic

IGC Proceedings (1993-2023)

Rangelands dominate the landscape of the Mediterranean part of Croatia along the Adriatic coastline, occupying 83% of the agricultural land (1.7 million ha) and 40% of the entire country. The proportion of rangelands is considerably higher in the Mediterranean littoral than in other ecological regions of Croatia. Sheep and goats are widespread in the region, comprising 76% of total sheep and goat numbers in Croatia. However, in comparison to other regions of Croatia, livestock production in the Mediterranean zone is not well developed. Continuous grazing begun too early in the growing season has caused substantial rangeland degradation and a decline …

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Plant Arrangement Effects On Dry Matter Production And Nitrogen Fixation Of Berseem Clover: Annual Ryegrass Mixture, C. Attardo, G. Di Miceli, A. S. Frenda, D. Giambalvo, C. Scarpello Jun 2023

Plant Arrangement Effects On Dry Matter Production And Nitrogen Fixation Of Berseem Clover: Annual Ryegrass Mixture, C. Attardo, G. Di Miceli, A. S. Frenda, D. Giambalvo, C. Scarpello

IGC Proceedings (1993-2023)

Agronomic factors affect the productivity and efficiency of cereal-legume intercropping systems (Ofori & Stern, 1987). This research aimed to determine the effects of different plant arrangement on hay yield, nitrogen (N) content and N fixation of berseem clover-annual ryegrass mixture in a Mediterranean semi-arid environment.

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Long-Term (9-Year) Response Of Two Semiarid Grasslands To Prescribed Fire In The Southwestern Usa, R. L. Pendleton, B. K. Pendleton, C. S. White Jun 2023

Long-Term (9-Year) Response Of Two Semiarid Grasslands To Prescribed Fire In The Southwestern Usa, R. L. Pendleton, B. K. Pendleton, C. S. White

IGC Proceedings (1993-2023)

Historically, arid grasslands of SW USA experienced fire return intervals of 5-10 years. During the last 100 years, however, fire has been a rare event. Recent expansion of woody plants in arid grasslands has prompted managers to re-introduce fire as a tool to reduce abundance of woody plants and maintain perennial grass cover. The use of fire in desert grasslands poses unique challenges, however, due to extreme variability in rainfall patterns. Our research examines vegetation response to repeat fire in 2 desert grassland ecotones near Albuquerque, New Mexico (35.05o N 106.60o W).

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Studies On Rehabilitation And Recovery Of Degraded Shrub Rangeland In Central China, G. Xiao Jun 2023

Studies On Rehabilitation And Recovery Of Degraded Shrub Rangeland In Central China, G. Xiao

IGC Proceedings (1993-2023)

Central China used to be the most important region for animal production, but over-grazing, over- cultivation and deforestation all resulted in a decline in shrub rangeland productivity as well as increasing soil degradation (JiZhou, 1989). Soil erosion, salinisation and desertification have become serious problems. The productivity of shrub rangeland decreased from 3,000~4,000kg/ha to 1,500~2,000kg/ha from the 1960s to the 1990s (Wei, 1991). Since 1990, measures have been taken to solve this problem with promising results.

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Reasons For The Premature Decline In Astragalus Adsurgens Stands In Kerqin Sandy Land, Qizhong Sun, Z. L. Wang, J. G. Han, Y. W. Wang, G. R. Liu Jun 2023

Reasons For The Premature Decline In Astragalus Adsurgens Stands In Kerqin Sandy Land, Qizhong Sun, Z. L. Wang, J. G. Han, Y. W. Wang, G. R. Liu

IGC Proceedings (1993-2023)

Diseases partly account for reductions in Astragalus adsurgens stand longevity. The effect of some cultural practices on the control of pests and diseases have been reported (Hou, 1986; Nan, 1996), but few reports have detailed the relationship among soil fertiliser status, diseases and premature stand decline. This study was conducted to investigate these relationships in order to extend the longevity of Astragalus adsurgens stands.

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