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Articles 20701 - 20730 of 291657

Full-Text Articles in Physical Sciences and Mathematics

Strategies For Maintenance And Restoration Of Soil, Water, Flora And Fauna Resources In Cold Temperate Rangeland. I. Grass Is Not Always King; Manage For Diversity, Bruce L. Welch Nov 2024

Strategies For Maintenance And Restoration Of Soil, Water, Flora And Fauna Resources In Cold Temperate Rangeland. I. Grass Is Not Always King; Manage For Diversity, Bruce L. Welch

IGC Proceedings (1977-2023)

To conserve natural resources on rangelands requires an integrated systems approach to management. This approach typifies strategic plans or initiatives of natural resource agencies involved with the management of cold temperate rangelands. Expounding on this theme, this paper (Part I) proposes one of two strategic actions: increase and optimise the use of shrub plant resources on rangelands. (The second strategy is discussed in the subsequent paper, Part II.) Shrubs contain many attributes not found in grasses or other herbaceous species that favourably affect hydrologic, soil conservation, plant growth, and other fundamental processes that characterise natural resource interactions.

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A Seed Supply Project For Tropical Forage Species In The Amazon Region Of Peru, J E. Ferguson, F Hidalgo, J Vela, G Silva, C Reyes, R Perez Nov 2024

A Seed Supply Project For Tropical Forage Species In The Amazon Region Of Peru, J E. Ferguson, F Hidalgo, J Vela, G Silva, C Reyes, R Perez

IGC Proceedings (1977-2023)

A multi-institutional seed supply project was conducted with activities in seed production, purchase and distribution; training and revision; technical assistance; and applied research. Over a 5-year period, 2 regional project nuclei were established and consolidated with minimum equipment and through training. A composite total of 8.5 t of seeds (i.e., all materials) were produced and distributed mainly for on-station and on-farm evaluation of grass-legume associations. The nuclei were sharefarmed with small-farmers and from 24 novices 4 experienced multipliers were identified. A rotating fund was a key financial mechanism. Annual reviews were highly participatory and included reporting, training, analysis and planning. …

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Commercial Seed Production Of Tropical Forage Grasses And Legumes In Costa Rica, Rosemary Sylvester-Bradley, J E. Ferguson Nov 2024

Commercial Seed Production Of Tropical Forage Grasses And Legumes In Costa Rica, Rosemary Sylvester-Bradley, J E. Ferguson

IGC Proceedings (1977-2023)

ABSTRACT A commercial seed enterprise with the initial objective of producing and marketing seeds of recently selected pasture species (Brachriaria dictyoneura and Arachis pintoi) oo small farms in the south west of Costa Rica is described. Farmers provide land and fencing and use the seed plots for grazing when not In the flowering period. The enterprise provides labour and technical organisation for establishment and seed production. Costs of organisation, and research and development work were greater than production costs; To achieve profitability the enterprise needs to increase net income possibly through share-cropping including animal production, and diversification into …

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Ruzi Grass (Brachiaria Ruziziensis) Seed Production In North-East Thailand, Chaisang Phaikaew, Chanchai Manidool, Pimpaporn Devahuti Nov 2024

Ruzi Grass (Brachiaria Ruziziensis) Seed Production In North-East Thailand, Chaisang Phaikaew, Chanchai Manidool, Pimpaporn Devahuti

IGC Proceedings (1977-2023)

The recent expansion of beef and dairy production in Thailand has increased demand for pasture seed. Ruzi grass (Brachiaria ruziziensis) seed production has increased from 18 tin 1983 to 466 tin 1991. The; production sites are in the north east, where soils and climate are most suitable for seed production. 60% of all ruzi seed is being produced by smallfarmers; the rest is produced by government stations. Average farmer yield of rilzi is 400 kg • seed/h'a, with each farmer contracted 'to grow 0.32 h�� of ruzi grass, at a guaranteed price of US$2/kg; Abo·ut 2700 farmers are …

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Effects Of Storage Period, Disease Infection And Treatment With Potassium Nitrate On Viability And Germination Rate Of Guinea Grass, Okoro Oji, F N. Madubuike, F.O C. Ezedinma Nov 2024

Effects Of Storage Period, Disease Infection And Treatment With Potassium Nitrate On Viability And Germination Rate Of Guinea Grass, Okoro Oji, F N. Madubuike, F.O C. Ezedinma

IGC Proceedings (1977-2023)

Mature seeds harvested from both fungicide-sprayed and unsprayed portions of plots, were stored and used in germination trials to test the effects of length of storage, disease infection and treatment with potassium nitrate solution on germination of guinea grass (Panicum maximum). There was no germination before 14 weeks of post-harvest storage irrespective of fungicidal treatment. Among the fungicide• sprayed seeds, germination was highest with 18 weeks' storage, suggesting a probable inactivity of the embryo when freshly harvested and up to 17 weeks' post-harvest storage. Treatment with potassium nitrate appeared to increase germination in Panicum maximum. For the …

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Model Herbage Seed Farm Establishment In South-West China, Guizhou Province, M P. Rolston, G W. Lill, R W. Brougham, Xie Jishi Nov 2024

Model Herbage Seed Farm Establishment In South-West China, Guizhou Province, M P. Rolston, G W. Lill, R W. Brougham, Xie Jishi

IGC Proceedings (1977-2023)

A model herbage seed farm was established during 1983-1988 in Guizhou to provide a base for research, training and the product.ion of quality seed for smallholder pasture development. The site is at 26°N in a monsoonal subtropical zone at 1000 m asl. Mean monthly temperatures range from 4°C in winter to 25°C in summer. Seed yield potential of cultivars of perennial ryegrass (Lolium perenne), cocksfoot (Dactylis glomerata), white clover (Trifolium repens) and red clover (Trifolium pratense) was evaluated. Major nutrient limitations were identified, including responses to K and P. Management strategies to …

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Pasture Seed Production In Tanzania, M L. Kusekwa, M M.S Lugenja, D B. Mpiri, J.K K. Msechu Nov 2024

Pasture Seed Production In Tanzania, M L. Kusekwa, M M.S Lugenja, D B. Mpiri, J.K K. Msechu

IGC Proceedings (1977-2023)

Grass seed of Chloris gayana, Branchiaria ruzizinsis, Cenchrus ciliaris, Panicum maximum and legume seeds of Macroptilium atropurpureum, Neonotonia wightii, Macrotyloma axillare, Stylosanthes spp., Desmodium pp., Centrosema spp. and Macrotyloma axillare are produced by government institutions and small-scale dairy producers in Tanzania. In the last 5 years 2-10 t of seed have been produced annually.· The producers have been responsible for the disposal of seeds. Small-scale seed producers have acquired seed production skills through short courses and farmers' day festivals. The World Food Programme has financed production of improved pasture seeds al government institutions and this has assisted in …

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Seed Production Of Centro Under Three Support Systems: Unstaked, Staked And Growing With Cassava, P Lusembo, E N. Sabiiti, C E. Ebong Nov 2024

Seed Production Of Centro Under Three Support Systems: Unstaked, Staked And Growing With Cassava, P Lusembo, E N. Sabiiti, C E. Ebong

IGC Proceedings (1977-2023)

A study was conducted to determine whether cassava could provide the necessary support to increase seed yields of centro (Cemrosema pubescens). The effect of centro on cassava tuber yield and the cost of production of centro seed under 3 production systems, i.e., unslaked, staked and supported by cassava, were determined. Results showed that centro twining on cassava yielded more seed than the unstaked one. It was slightly but significantly (P<0.05) less than that of staked cenlro. Centro did not affect cassava tuber yield. Production costs of 1 kg of seed were equivalent to US$1.2, 2 and 3.7 for centro supported by cassava, unslaked and staked, respectively. It was concluded that centro seed could be easily and economically produced on small-scale farm holdings in Uganda where cassava in widely grown.

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Efficiency Of Grassland Areas Of Desert Steppe In North China, Wang Ning, Wang Kezhi Nov 2024

Efficiency Of Grassland Areas Of Desert Steppe In North China, Wang Ning, Wang Kezhi

IGC Proceedings (1977-2023)

On the desert steppe of Yanchi County of Ningxia Province, where 1he annual precipilalion is only 300 mm, some methods, including reducing unirrigated land, exploiting water resources, cultivating grasses, planting trees and developing animal husbandry, have been used to improve production. After 10 years the poor villages have become richer; the cultivated grassland is up to 44% of the total arable area and the forest cover to 15%; value of livestock farming output has increased by as much as 5 times, gross yields of grain have increased 1.5-fold, and the average income per capita increased more than 5-fold.

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Some Problems Hindering Forage Seed Production In Cameroon, E Tedonkeng Pamo Nov 2024

Some Problems Hindering Forage Seed Production In Cameroon, E Tedonkeng Pamo

IGC Proceedings (1977-2023)

Seed production is a key factor for successful and increased agricultural production both in favourable and unfavourable environments. In many developing countries, seed production in general, and forage seed production in particular, have often been neglected. As n result, very litlle information exists in this area. This study was carried out to assess forage seed production and perspectives in Cameroon. The findings indicate that large quantities of forage seed have been introduced in Cameroon but very little has reached the farmers because of political nnd institutional problems and lack of extension assistance at farm level. This points to a necessity …

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Towards More Forage Seeds For Small Farmers In Latin America, J E. Ferguson, G Sauma Nov 2024

Towards More Forage Seeds For Small Farmers In Latin America, J E. Ferguson, G Sauma

IGC Proceedings (1977-2023)

Smallfarmers in Latin America are scattered among different agroecosystems, such as: Andean highlands; Central American and Andean hillsides; Amazonian basin forest margins; and non-Andean crop margins. Forages, mainly grasses, are used to different degrees in mainly mixed and diversified crop-livestock farming syslems. The range of species, both temperate and tropical, is wide and increasing. Seed supply is variable, but limited by the range and availabilily of materials, variable quality of tropical grasses and high prices. Seed systems tend to be informal and incipient, especially with tropical species. This paper describes five seed projects and seed enterprises and draws generalisations from …

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Sustainable Supplies Of Quality Herbage Seed For Sub-Saharan Africa Smallholders, R Griffiths Nov 2024

Sustainable Supplies Of Quality Herbage Seed For Sub-Saharan Africa Smallholders, R Griffiths

IGC Proceedings (1977-2023)

SubSaharan Africa herbnge seed activities were evaluated by means of questionnaires. Topics ranged from collection and evaluation, through multiplication to distribulio,n nnd seed quality. The current smallholder lack of access lo herbage seed supplies is discussed and proposals for overcoming this problem submitted for consideration by those concerned.

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Interaction Of Drill Type And Herbicide On Pasture Establishment In Semi-Arid Environments, W L. Lowther, R F. Horrell, P D. Johnstone, K D. Trainor Nov 2024

Interaction Of Drill Type And Herbicide On Pasture Establishment In Semi-Arid Environments, W L. Lowther, R F. Horrell, P D. Johnstone, K D. Trainor

IGC Proceedings (1977-2023)

Results are presented from an overdrilling experiment comparing a conventional triple-disc drill with an' experimental single-pass strip­seeder drill designed to remove competing vegetation mechanically; Herbicide application markedly increased herbage mass of sown species in the triple-disc treatments. ,However, herbage mass was. ��igher from the strip-seeder drill than the .triple-disc in both ihe' nbsence and presence of herbicide. The results indicate the potential of the strip-seeder drill technology for cost-effective establishment of pasture species in difficult environments.

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A 52-Year Ecological History Of Selected Introduced And Native Grasses Planted In Central Idaho, Stephen B. Monsen, Val Jo Anderson Nov 2024

A 52-Year Ecological History Of Selected Introduced And Native Grasses Planted In Central Idaho, Stephen B. Monsen, Val Jo Anderson

IGC Proceedings (1977-2023)

This study evaluated the longevity of 132 introduced and iiative grass ecotypes seeded on a mountain big sagebrush-bluebunch wheatgrass (Atremisia tridentata ssp. vaseeyana-Agropyron spicatum) site in south• central Idaho. Species were established by direct seeding in 2 randomly replicated plots in 1939. Plantings were evaluated annually for 10 years and then at approximately 10-year intervals until 1991. Intermediate wheatgrass (Agropyron lntermedium), Fairway crested wheatgrass (Agropyron cristatum), and sulcata sheep fescue (Festuca ovina ssp. sulcata) were the primary introductions that persisted throughout the study. Native bluebunch wheatgrass and western wheatgrass (Agropyron smithii) were equally …

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Effect Of Direct Drilling On The Establishment On The Establishment And Growth Of Birdsfoot Trefoil In Montane Tussock Grasslands, R F. Woodman Nov 2024

Effect Of Direct Drilling On The Establishment On The Establishment And Growth Of Birdsfoot Trefoil In Montane Tussock Grasslands, R F. Woodman

IGC Proceedings (1977-2023)

Establishment of birdsfoot trefoil (Lotus corniculatus L.) using an experimental strip-seeder drill was compared with that of a conventional triple disc in the presence and absence of paraquat in the Mackenzie Basin, South Island, New Zealand. Measurements of shoot, root and nodule formation showed that plants established with the experimental strip-seeder drill nodulated earlier and had significantly greater vigour than those established with the disc drill. These results are discussed in relation to the ability of the experimental strip-seeder to improve plant growth, survival and yield in stressed environments compared to the triple disc.

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Pasture Grasses For Semi-Arid Environments In New Zealand, R F. Woodman Nov 2024

Pasture Grasses For Semi-Arid Environments In New Zealand, R F. Woodman

IGC Proceedings (1977-2023)

The production of 8 dryland forage gross species and compatibility with lucerne were evaluated over a period of 2 years in the Hakataramea Valley, South Canterbury, New Zealand. Black Mountain rye (Seca le 1110111am1111) is highly promising as a palatable, drought, frost- and pest-tolerant species that provides large amounts of green feed, par ticularly in early spring and autumn. Cocksfoot (Dactylis glomerala), tall oat grass (A rrhenalherum e/atius), smooth brome (Bro111 11s inennis) and phalaris (Phalaris aq11atica) also show potential as productive drought-tolerant grasses, compatible with lucerne (Medicago saliva cv .), and exhibiting good cool•season growth. Wheatgrass (Electrlgia i111ermedia) appears …

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Improvement Of Shrub-Covered Hill Pasture By Root Raking: Effect Of Aspect, Superphosphate And Time From Sowing On Nitrogen Fixation And Clover Growth, M P. Rolston, J R. Crush, B P. Devantier Nov 2024

Improvement Of Shrub-Covered Hill Pasture By Root Raking: Effect Of Aspect, Superphosphate And Time From Sowing On Nitrogen Fixation And Clover Growth, M P. Rolston, J R. Crush, B P. Devantier

IGC Proceedings (1977-2023)

New white clover (Trifolium repens) grass pastures were established on shrub-covered hill slopes cleared by bulldozer root raking, The site included north and south aspects, and plots were individually fenced and grazed with sheep with superphosphate treatments of 1815 or 790 kg/ha (9% P). Nitrogen fixation was assessed over 5 years, with up. to 308 kg N/ha fixed in year I. Nitrogen fixation rates declined with time and were 72% higher on the moister southern aspect, and 33% higher with high superphosphate. Clover production showed similar trends. Nitrogen fixation efficiency (kg N fixed/I clover dry matter) increased from …

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Breeding Switchgrass For Improved Animal Performance, K P. Vogel, K J. Moore, A A. Hopkins Nov 2024

Breeding Switchgrass For Improved Animal Performance, K P. Vogel, K J. Moore, A A. Hopkins

IGC Proceedings (1977-2023)

Studies on breeding and evaluating switchgrass (Panicum virgatum L.) for improved animal performance have been conducted for the last 18 years. !ti vitro dry matter digestibility (IVDMD) has been increased 3 8 g/kg after 3 cycles of selection; demonstrating· that IVDMD of switchgrass can be improved using recurrent, phenotypjc selection. Digestibility of plant tillers collected at panicle emergence was an excellent predictor of IVDMD of progeny in pastures or swards during the growing season. Small improvements in IVDMD (20-30 g/kg} significantly improved average daily gains and gains/ha (17-24 %) of beer cattle (Bos taurus) grazing switchgrass. It should …

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Fertilizer Policies For Grassland Production In Winter Cold High Country In The South Island New Zealand And Southern China, C C. Boswell, M.J S. Floate Nov 2024

Fertilizer Policies For Grassland Production In Winter Cold High Country In The South Island New Zealand And Southern China, C C. Boswell, M.J S. Floate

IGC Proceedings (1977-2023)

Fertiliser policies for legume-based pastures on the high plateau of Guizhou province southern China are compared with those for the South Island of New Zealand, Guizhou policy is reduced to a few essentials. Choice of fertiliser is restricted; severe phosphorus deficiency is corrected with locally manufactured fused calcium magnesium phosphate, potassium deficiency with imported potassium sulphate or chloride. A simple recommendation applies for establishment and maintaining production over vast areas and potentially to huge numbers of small farms (3-7 ha). In the South Island high country, fertiliser forms and rates are matched as far as possible to the variety of …

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Residual Effects Of Oversowing, Overdrilling, And Herbicide In The Long-Term Control Of Hieracium Pilosella In Otago, New Zealand, G G. Cossens, C C. Boswell Nov 2024

Residual Effects Of Oversowing, Overdrilling, And Herbicide In The Long-Term Control Of Hieracium Pilosella In Otago, New Zealand, G G. Cossens, C C. Boswell

IGC Proceedings (1977-2023)

The mat-forming weed Hieracium pilosella {mouse-eared hawkweed) has become a major problem of tussock grasslands in New Zealand. Thirteen trials investigating methods of hawkweed control were laid down during 1975-80, monitored for 3 years, and subsequently reassessed in 1991. When grazing was excluded hawkweed was reduced from 60 to 3% ground cover within 18 months by topdressing and oversowing or overdrilling legumes; and to 22% by the use of the herbicides, 2,4 D and mecoprop-MCPA-dicamba. With grazing and no further topdressing, these improved lands reverted to hawkweed at a mean rate of 2-3%/year, as did overgrazed unimproved tussock grassland. In …

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Rangeland Improvement On Granitic Soils In Uruguay, D F. Risso, D A. Moron Nov 2024

Rangeland Improvement On Granitic Soils In Uruguay, D F. Risso, D A. Moron

IGC Proceedings (1977-2023)

Granitic soils comprise more than 15% of productive land of the country, Soils are variable, all being deficient in nitrogen and phosphorus, having a moderately low pH, more than 40% being shallow with low levels of organic matter. Livestock production is predominantly developed on range with moderate yield and ample variations (avg. DM/ha/year=3.l t; c.v.=27.6%; winter yield=l2%), Research conducted to improve this situation, evaluated: 1) range P fertilisation during 5 years, which resulted in a small (but significant) yield increase and improved P concentration of forage. 2) P fertilisation and interseeding of legumes through different methods. Largest differences were due …

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Use Of Dryland Forage Plants For Improving Semi-Arid And Hawkweed-Affected Land In New Zealand, B J. Wills, J S. Sheppard, J.S C. Begg Nov 2024

Use Of Dryland Forage Plants For Improving Semi-Arid And Hawkweed-Affected Land In New Zealand, B J. Wills, J S. Sheppard, J.S C. Begg

IGC Proceedings (1977-2023)

mi-arid climatic conditions affect large areas of New Zealand's South Island east coast and inland basins. A significant area - some 6 million ha - is affected by, or is at risk from, invasion by hawkweeds, mainly Hieracium pilose/la. This plant, along with rabbits, is severely affecting the viability of extensive pastoral grassland farming in New Zealand. Soil erosion, in particular associated with frost heave and wind, is notable in areas associated with both a semi-arid climate and high densities of hawkweeds. The use of dryland pasture plants selected for drought tolerance, frost tolerance and ability to grow under low …

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Small-Grain Forage For Winter Pastures, D J. Undersander, D P. Hutchenson Nov 2024

Small-Grain Forage For Winter Pastures, D J. Undersander, D P. Hutchenson

IGC Proceedings (1977-2023)

The paper summarises 2 studies comparing wheal (Triticum aestivum), barley (Horderim vulgare), rye (Triticale secale), and triticale (x Triticoseca/e) for fornge production and animal performance. Wheat, rye and triticale were planted in 10, 20 and 30 cm row spacings and grown over 2 winters in South Carolina. Porage yield from early­October plantings ranged from 2961 to 5000 kg/ha in 1986-87 and from l012 to 3400 kg/ha in 1987-88. Porage yield was highest from rye, most of the forage growth occurring in autumn. Wheat produced forage growth most uniformly throughout autumn and spring. In the …

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Effects Of Lime And Fertilizer On The Establishment Of White Clover In The Falkland Islands, J A. Kerr, Rosie Poultney Nov 2024

Effects Of Lime And Fertilizer On The Establishment Of White Clover In The Falkland Islands, J A. Kerr, Rosie Poultney

IGC Proceedings (1977-2023)

White clover (Trifolium repens L.)-based pastures could improve low pasture and animal production in the Falkland Islands. However, establishment is difficult and expensive. Effects of lime and fertilisers containing nitrogen (N), phosphorus (P) and potassium (K) on white clover dry matter yield and root nodulation were experimentally assessed between 1986-88. Lime at 1 t/ha and 30 kg/ha P as triple superphosphate, separately improved clover yield. Nodulation was improved only by lime. Neither N nor K fertilisers affected on white clover establishment yields,

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Complementarity Between Summer-Active Grasses And Cool-Season Annual Legumes In Temperate-Zone Pastures, W H. Johnston Nov 2024

Complementarity Between Summer-Active Grasses And Cool-Season Annual Legumes In Temperate-Zone Pastures, W H. Johnston

IGC Proceedings (1977-2023)

The effect of mowing and subterranean clover (Trifolium subterraneaum) on plant density; basal area and total dry matter yield of the C perennial grasses Eragrostis curvula complex, cv. Consol and 4 Accession 4660, and Cenchrus ciliaris cv. American, and the c; Pllalaris aquatica cv. Sirocco was studied at Cowra, NSW, Australia between spring 1982 and spring 1987. C. cilaris did not persist. The density and basal area of phalaris was not affected by subterranean clover but declined with mowing, Clover reduced the density, basal area and summer dry matter ·yield of E. curvula while mowing was', advantageous. E. curvula …

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Winter Grazing Rough Fescue Grasslands With And Without Preconditioning On Annual Pasture, W D. Willms, L M. Rode, B S. Freeze Nov 2024

Winter Grazing Rough Fescue Grasslands With And Without Preconditioning On Annual Pasture, W D. Willms, L M. Rode, B S. Freeze

IGC Proceedings (1977-2023)

Winter grazing of the fescue prairie is desirable to reduce the cost of feeding preserved forages and to conserving the native prairie. Rough fescue (Festuca campestris Rydb,), the dominant and most productive forage species in the foothills region, is highly sensitive to summer grazing but tolerates grazing while dormant. Since the forage quality declines after senescence, and the energy requirements increase in winter, this study was made to determine the feasibility of winter gmzing pregnant Hereford cows with and without preconditioning on annual pasture. The study, replicated over a 4-year period {n=4), used a 2x2 factorial design representing native …

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Interaction Of Drill Type And Herbicide On Pasture Establishment In Semi-Arid Environments, W L. Lowther, R F. Horrell, P D. Johnstone, K D. Trainor Nov 2024

Interaction Of Drill Type And Herbicide On Pasture Establishment In Semi-Arid Environments, W L. Lowther, R F. Horrell, P D. Johnstone, K D. Trainor

IGC Proceedings (1977-2023)

Results are presented from an overdrilling experiment comparing a conventional triple-disc drill with an' experimental single-pass strip­seeder drill designed to remove competiting vegetation mechanically; Herbicide application markedly increased herbage mass of sown species in the triple-disc treatments. ,However, herbage mass was. higher from the strip-seeder drill than the .triple-disc in both ihe' nbsence and presence of herbicide. The results indicate the potential of the strip-seeder drill technology for cost-effective establishment of pasture species in difficult environments.

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Alfalfa Cultivar Selection From 30 Years Of Records In The State Of Illinois, Usa, Don W. Graffis Nov 2024

Alfalfa Cultivar Selection From 30 Years Of Records In The State Of Illinois, Usa, Don W. Graffis

IGC Proceedings (1977-2023)

Data from alfalfa (Medicago sativa L.) cultivar trials in Illinois, USA from 1963 lo 1992 have been adapted to a computer software spreadsheet for storage and manipulation. The data recorded have been the percentage of check cultivar's yield. The average % of checks for a given cultivar is calculated after each year of recorded yield. The computer spreadsheet enables sorting of resultant yields. The sorting in descending order determines lhe top-performing cultivars. Criteria used lo determine cultivar suggestions for extension clienlele are: (a) a minimum of 3 harvest years in the region of cultivar suggestion, and (b) the cultivar …

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Developing Eastern Gamagrass On A Conserved Forage, John A. Dickerson, Paul R. Salon Nov 2024

Developing Eastern Gamagrass On A Conserved Forage, John A. Dickerson, Paul R. Salon

IGC Proceedings (1977-2023)

Bastern gamagrass (Tripsacum dactyloides L.) is highly regarded as a native forage resource in the prairie region of North America. Recent discovery of a gynomonoecious plant in Kansas has raised expectations that efficient seed production will be possible with the species. A possible use for eastern gamagrass is as a perennial haylage crop for dairy farms, replacing erosion-prone silage corn. Compared with corn silage, eastern gamagrass forage has higher crude protein, slightly lower energy, and higher neutral detergent fibre and acid detergent fibre. Breeding work is underway to develop hardy, high volume forage-producing strains with good seed production capability. …

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Rangelands In Dry Mountain Areas, T Boyadgiev Nov 2024

Rangelands In Dry Mountain Areas, T Boyadgiev

IGC Proceedings (1977-2023)

The extent and characteristics of temperate and mountainous climatic zones, steeply dissected and mountainous areas, permanent meadows and pasture lands, and the trend of land use evolution and aspects of land degradation are presented and discussed. The rangelands improvement strategy in Bulgaria is based on mineral fertilisation of mountainous grasslands leading to an increase in production of dry material, protein, phosphorus and cereals, This reduces sheet erosion. Overgrazing and prolonged dry periods, causing a decrease in the number of species, are also discussed, Measures to improve grassland practices are proposed.

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