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Full-Text Articles in Soil Science
Tropical Corn For Silage In Multiple Cropping Systems, J C. Burns, D S. Fisher
Tropical Corn For Silage In Multiple Cropping Systems, J C. Burns, D S. Fisher
IGC Proceedings (1997-2023)
This study compared the yield potential and inherent nutritive value and quality of tropical corn (Zea mays L.) with temperate corn and two forage sorghums [Sorghum bicolor (L.) Moench] for use in multiple cropping systems. Tropical corn showed high dry matter yield potential (19.3 Mg ha-1) compared with a selected temperate corn (14.7 Mg ha-1) or with an intermediate (8.5 Mg ha-1) or taller growing forage-type sorghum (10.3 Mg ha-1). Neutral detergent fiber concentration (g kg-1) was lower for temperate corn (330) than for tropical (548) corn which had a concentration similar to the intermediate (497) and forage-type …
Bahiagrass Forage Production And Quality As Effected By Municipal Biosolids, R M. Muchovej, J E. Rechcigl
Bahiagrass Forage Production And Quality As Effected By Municipal Biosolids, R M. Muchovej, J E. Rechcigl
IGC Proceedings (1997-2023)
Production of biosolids has been increasing consistently in the last few years. Land application of wastes is being regarded as an alternative means of disposal and as a source of inexpensive fertilizer material. Pastures are particularly attractive in this regard since the areas occupied are extensive and large amounts of fertilizer are required for adequate production. The objective of this study is to investigate the effects of various rates of biosolids on bahiagrass yield and quality. Forage samples were collected from each plot from April to December. Significant increases in dry matter production, crude protein content and in vitro digestibility …
Use Of Reactive Phosphate Rock For Pastures On The Southern Tablelands Of Nsw, Australia, D L. Garden, P R. Dann, I J. Mcgowen, C O'Malley
Use Of Reactive Phosphate Rock For Pastures On The Southern Tablelands Of Nsw, Australia, D L. Garden, P R. Dann, I J. Mcgowen, C O'Malley
IGC Proceedings (1997-2023)
A comparison was made of pasture production from phosphate fertilisers, including superphosphate, reactive phosphate rocks (RPRs) and a non-reactive phosphate rock at two sites on the Southern tablelands of NSW, Australia. Production from all phosphate rocks was low in the first year at both sites, but RPRs were similar to superphosphate by the fourth year. Production from RPRs was low in a dry year which is consistent with the requirement for moist acid soils for effective release of P from RPRs. Performance of RPRs was better at the site which was moister and had higher summer rainfall.
Benefits Of Applying Cow Slurry In Bands Beneath Grass Canopies, S Bittman, C G. Kowalenko, O Schmidt, D E. Hunt
Benefits Of Applying Cow Slurry In Bands Beneath Grass Canopies, S Bittman, C G. Kowalenko, O Schmidt, D E. Hunt
IGC Proceedings (1997-2023)
Efficient methods of application may enable dairy producers to use slurry manure as aoereplacement for inorganic nitrogen on grassland. This study compares the effect of slurry applied in bands beneath the grass canopy (drag-shoe) with a broadcast of slurry on top of the canopy (splash-plate), and with fertilizer nitrogen on yield of grass. Trials were conducted in spring, summer and fall of 1995 on established tall fescue in south-coastal B.C. Slurry manure was applied by drag-shoe or splash-plate at 50 and 100 kg ha-1 (nominally), at start of grass regrowth or 7-8 days later. A range of rates of NH4NO3 …
Different Response Of Lucerne (Medicago Sativa L.) Cultivars To P And Zn Fertilization And Susceptibility To Phosphorus-Induced Zinc Deficiency On Calcareous Soils, Gansu, China, Chen Wen, Graham Eagleton, Graeme Blair
Different Response Of Lucerne (Medicago Sativa L.) Cultivars To P And Zn Fertilization And Susceptibility To Phosphorus-Induced Zinc Deficiency On Calcareous Soils, Gansu, China, Chen Wen, Graham Eagleton, Graeme Blair
IGC Proceedings (1997-2023)
The three pot experiments were carried out at the Qingyang Research Station, Gansu, China to determine the yield response of P and Zn, and examine the effect of soil types on P and Zn requirement of the local and introduced lucerne cultivars in the establishment phase on calcareous soils. The results showed marked growth and dry matter yield benefit at lucerne establishment when P fertiliser was applied on both soils. There were no consistent difference among the three cultivars in response to added P. A significant shoot yield response to Zn was only recorded at high P supply in the …
Silage Production Possibility Of Sorghum Vulgare, S. Sudanense And Their Hybrid On The Second Crop Conditions Of Tokat-Turkey, U Büyükburç, Y Karadag, M Yildirim
Silage Production Possibility Of Sorghum Vulgare, S. Sudanense And Their Hybrid On The Second Crop Conditions Of Tokat-Turkey, U Büyükburç, Y Karadag, M Yildirim
IGC Proceedings (1997-2023)
The objective of the work was to determine biological characters of some fodder grasses (Sorghum, Sudangrass and their hybrid) under second crop condition of Tokat-Turkey with different N levels. The grasses were sown on 20-21 July 1994-1995 after harvesting the main crop of wheat, harvested at the end of October 28-29. Application of 40 - 80 - 120 kg/ha N fertilizer increased the plant height, fresh fodder, DM yield, CP contents in all plants. The hybrid showed the highest fresh and dry fodder yield (100.7 - 23.4 Mg/ha) at the high level of N. Leaf rate declined with use of …
Increased Longevity Of Red Clover Through Selection For Persistence And Disease Resistance, R R. Smith
Increased Longevity Of Red Clover Through Selection For Persistence And Disease Resistance, R R. Smith
IGC Proceedings (1997-2023)
Red clover (Trifolium pratense L.), an excellent perennial forage legume, has been considered for many years to be a short-lived, two to three years, forage. Selection for resistance to foliar and root rot diseases and for longevity of stand over the past four decades has improved the persistence of the currently available cultivars. The present studies were conducted to evaluate the progress from selection for longevity and disease resistance. Selection for stand longevity and improved disease resistance has reliably extended the production of red clover into the third and fourth year. Selection for healthy plants in 3- or …
Selection For Herbage Yield And Flowering In Ladino White Clover, J A. Garcia
Selection For Herbage Yield And Flowering In Ladino White Clover, J A. Garcia
IGC Proceedings (1997-2023)
A geno-phenotypic recurrent selection program is being carried out on ladino white clover (Trifolium repens L.) aiming to combine good DM and seed yields. Selection criteria includes plant density, vigor, winter growth, flowering and diseases resistance. The performance of selections in terms of DM yields and seed production was evaluated in separate trials. Two cycles of selection increased flowering by 36% and seed yield by 59%. Preliminary data on herbage yields shows a very good performance of the selected material and suggests the feasibility of combining high DM and seed yields.
Performance Of Perennial Peanut (Arachis Glabrata Benth) In Cameroon, R M. Njwe, B Awounfouet
Performance Of Perennial Peanut (Arachis Glabrata Benth) In Cameroon, R M. Njwe, B Awounfouet
IGC Proceedings (1997-2023)
The objective of this study was to assess the yield and chemical composition of perennial peanut (Arachis glabrata) at growth intervals of 30, 45, 45, 60, 75 and 90 days so as to recommend the best interval of cutting. The yield of dry matter increased from 3133 to 3804 kg ha-1 at cutting intervals of 30 and 60 days, respectively, after which it declined to 3445 kg ha-1 at 90 days . The dry matter content increased with cutting interval from 25.6 % at 30 days to 31.6 % at 90 days. After 45 days of regrowth the crude protein …
Forage Production Potential Of Poa Arachnifera Torr In Semi-Arid Climates, J C. Read, M A. Sanderson, G W. Evers, P W. Voigt, J A. Reinert
Forage Production Potential Of Poa Arachnifera Torr In Semi-Arid Climates, J C. Read, M A. Sanderson, G W. Evers, P W. Voigt, J A. Reinert
IGC Proceedings (1997-2023)
This study was undertaken to determine the forage potential of Texas bluegrass (Poa arachnifera Torr). Texas bluegrass is a perennial coolseason grass native to Kansas, Oklahoma, western Arkansas, and the central region of Texas, USA (Gould, 1975). Thirteen different accessions were established in 1988 at the Texas A&M University Centers at Dallas and Stephenville and tested for 2 years. Mean yields at Stephenville and Dallas were 3610 and 6022 kg ha-1. Two synthetic varieties (Syn-1 and Syn-2) were tested from 1990 to 1995 at four locations in Texas. Yields of Syn-1 was greater than Syn-2 whereas Syn- 2 provided …
Participatory Evaluation Of Urochloa (Brachiaria) Grasses In The Cool Highlands Of Central Kenya, Elkana Nyambati, W. Ayako, S. K. Mailu
Participatory Evaluation Of Urochloa (Brachiaria) Grasses In The Cool Highlands Of Central Kenya, Elkana Nyambati, W. Ayako, S. K. Mailu
IGC Proceedings (1997-2023)
Grasslands are increasingly threatened by over exploitation, degradation and climate change that has undermined their productive capacity, leading led to inadequate quantity and quality feed. Urochloa grass, a native of eastern Africa has been widely improved and adapted as livestock forage. A farmer participatory study was conducted to evaluate productivity of eight Urochloa grasses (Urochloa brizantha cv. Marandu, U. brizantha cv. Xareas, U. brizantha cv. Piata, U. brizantha cv. MG4, U. decumbens cv. Basilisk, U. humidicola cv. Humidicola, U. humidicola cv. Llanero and Urochloa hybrid Mulato II) compared to controls of Pennisetum purpureum (Napier grass cv. Kakamega 1 …
Development Of Megathyrsus Maximus Genotypes For Intensification Of Cattle Rearing In Brazil, Liana Jank, M. F. Santos, Sanzio Carvalho Barrios, Cacilda Borges Do Valle, Rosangela Maria Simeão
Development Of Megathyrsus Maximus Genotypes For Intensification Of Cattle Rearing In Brazil, Liana Jank, M. F. Santos, Sanzio Carvalho Barrios, Cacilda Borges Do Valle, Rosangela Maria Simeão
IGC Proceedings (1997-2023)
Megathyrsus maximus is a forage species used over 30 million hectares in Brazil and in the surrounding countries for intensification of the cattle production systems. Due to the large area and distinct biomes in which it is used, there is a need to continuously develop more productive and adapted cultivars to each biome and use. Three apomictic accessions were crossed with five sexual plants at Embrapa Beef Cattle in Campo Grande, MS, Brazil in 2014. More than 1100 hybrids were planted in a spaced-plant field and evaluated visually for regrowth after cuts and for disease and pest damage. In 2016, …
Application Of Fall Nitrogen Increased Spring Tall Fescue Yield, B. L. Hendrix, Christopher D. Teutsch, J. Duckworth
Application Of Fall Nitrogen Increased Spring Tall Fescue Yield, B. L. Hendrix, Christopher D. Teutsch, J. Duckworth
IGC Proceedings (1997-2023)
Late season nitrogen fertilization is a practice that has long been implemented in turfgrass production. This practice involves applying nitrogen from September through December and results in an extended green period in the fall without stimulating excessive shoot growth. The longer green period results in higher levels of carbohydrate reserves and enhanced root growth compared with a spring-summer fertilization program. In addition to these benefits, sods fertilized in late fall have been shown to green up two to six weeks earlier in the spring. Limited research has considered the impact of late fall nitrogen applications on grass growth in hayfields …
Comparing Forage Biomass Estimation Between Forager-Mounted Near Infrared Spectroscopy (Nirs) And Rising Plate-Meter (Rpm) Techniques, Andy G. Jones, G. Irisarri, T. Takahashi, M. J. Rivero, P. Harris
Comparing Forage Biomass Estimation Between Forager-Mounted Near Infrared Spectroscopy (Nirs) And Rising Plate-Meter (Rpm) Techniques, Andy G. Jones, G. Irisarri, T. Takahashi, M. J. Rivero, P. Harris
IGC Proceedings (1997-2023)
Quantifying the forage mass harvested per paddock is essential for informing late-season management decisions on grazing livestock farms. This information can be used to calculate winter feed budgets and thus support decisions such as area of land to defer for autumn grazing, and head of stock to sell before winter housing. However, there are practical limitations associated with existing measurement methods, which can influence the accuracy of forage biomass estimates. The purpose of the current study was therefore to compare biomass estimation from two alternative precision farming methods — near infrared spectroscopy (NIRS) integrated within-spout of a self-propelled forage harvester, …
Plant Breeding Perspectives For Alfalfa (Medicago Sativa L.) Success In Warm Climates, Esteban F. Rios, M. Murad Andrade, C. C. Fernandes Filho, P. Sipowicz, A. Biswas, R. Ulbricht, D. Basigalup, E. C. Brummer
Plant Breeding Perspectives For Alfalfa (Medicago Sativa L.) Success In Warm Climates, Esteban F. Rios, M. Murad Andrade, C. C. Fernandes Filho, P. Sipowicz, A. Biswas, R. Ulbricht, D. Basigalup, E. C. Brummer
IGC Proceedings (1997-2023)
Climate change can have major impacts on adaptation of forage species to agroecosystems around the world. The ability of breeders to select for traits that impart adaptability to climate resilience will be critical for the future of grasslands. Alfalfa (Medicago sativa L.) is the most important perennial forage legume in the world because of its relatively high yield and nutritional value. In Florida, nondormant cultivars were developed for improved adaptation to the state’s subtropical agroecosystem (‘Florida 66’, ‘Florida 77’, and ‘Florida 99’); however, these cultivars are not commercially available. Breeding efforts are underway to develop new nondormant alfalfa adapted …
Growth Components And Yield Of Brachiaria Ruziziensis (Congo Grass) And Centrosema Pascuorum (Centro) Mixtures As Influenced By Mixture Ratios, Phosphorus Levels And Stage Of Harvest, I. Sani, J. T. Amodu, R. J. Tanko, M. R. Hassan, N. Adamu
Growth Components And Yield Of Brachiaria Ruziziensis (Congo Grass) And Centrosema Pascuorum (Centro) Mixtures As Influenced By Mixture Ratios, Phosphorus Levels And Stage Of Harvest, I. Sani, J. T. Amodu, R. J. Tanko, M. R. Hassan, N. Adamu
IGC Proceedings (1997-2023)
This study was conducted during the 2017 and 2018 rainy season at the Crop Production Research farm, Abubakar Tafawa Balewa University, Bauchi to determine the effects of plant mixture ratios in Brachiaria ruziziensis and Centrosema pascuorum (100% Sole B. ruziziensis, 75% B.R: 25% C.P, 50% B.R: 50% C.P, 25% B.R: 75% C.P and 100% Sole C. pascuorum) and phosphorus fertilizer (SSP) levels (0, 100 and 150kg/ha). The experiment was in a split-plot design with 5x3 factorial arrangement in which the mixture ratios constituted the main plots while phosphorus (SSP) levels constituted the sub treatments. Number of plants per …
Cool-Season Perennials And Stability In Year-Round Forage Production Systems, C. D. Teutsch
Cool-Season Perennials And Stability In Year-Round Forage Production Systems, C. D. Teutsch
IGC Proceedings (1997-2023)
Changes in long-term climate normals have resulted in warmer and wetter summers and milder winters in the humid eastern United States. This will likely impact regional forage species adaptation in the long-term and varietal adaptation in the short term. Variety evaluation has been occurring at the University of Kentucky for almost 100 years. There are several considerations for selecting forage species and varieties including regional and local adaptation, productivity, distribution of growth, palatability, nutritive value, anti-quality factors, tolerance to stress, and persistence. Two of the most important criteria are long-term productivity and persistence under grazing, both of which are currently …
Relationships Between Productivity, Quality And Traits In Seven Co-Occurring Grass Species, L. S. Pontes, Jean-François Soussana, P. Carrère, F. Louault, J. Aufrère, D. Andueza
Relationships Between Productivity, Quality And Traits In Seven Co-Occurring Grass Species, L. S. Pontes, Jean-François Soussana, P. Carrère, F. Louault, J. Aufrère, D. Andueza
IGC Proceedings (1997-2023)
The impacts of management options sometimes have dramatic effects on botanical composition which in turn affect yield and nutritive value. A functional analysis of vegetation response may help to understand and predict the impact of changes in grassland management in a more general way screening for plant traits that may control productivity and nutritive value.
Effect Of Adding Moraine Soil Or Shell Sand Into Peat Soil On Soil Properties And Grass Yields In Western Norway, L. S. Sognnes, G. Fystro, S. Øpstad
Effect Of Adding Moraine Soil Or Shell Sand Into Peat Soil On Soil Properties And Grass Yields In Western Norway, L. S. Sognnes, G. Fystro, S. Øpstad
IGC Proceedings (1997-2023)
Cultivation and utilisation of peat soil leads to problems related to its high water content. The problems have become more pronounced with the increasing weight of agricultural machinery and more frequent harvesting. Increased particle density, reduced porosity and decreased potential plant-available water was found after incorporation of sand to peat in experiments conducted in the north of Norway (Sveistrup & Haraldsen, 1995). Peat soil has a weak soil skeleton, low bearing capacity, poor thermal properties and insufficient soil aeration. The objective of this study was to investigate the impact of added mineral material to peat soil to improve characteristics important …
Yield Progress Of Perennial Ryegrass And Silage Maize - Genetic Gain Or Climate Change?, Antje Herrmann, A. Kornher, Friedhelm Taube
Yield Progress Of Perennial Ryegrass And Silage Maize - Genetic Gain Or Climate Change?, Antje Herrmann, A. Kornher, Friedhelm Taube
IGC Proceedings (1997-2023)
Gains in annual dry matter yield (DMY) from breeding achieved during the last decades are reported to range between 2.5 and 6% per decade for perennial ryegrass (Wilkins & Humphreys, 2003). In contrast, accelerated progress in improving DMY has been achieved for silage maize, varying between 8 and 13% per decade (Lauer et al., 2001). These gains are mainly attributed to (i) genetic yield potential increase, (ii) improved crop management and (iii) increased stress tolerance. The potential impact of climate change on yield progress, however, is disregarded in most studies. The objective of this study therefore was to quantify …
Herbage Accumulation And Vegetation Structure In Tanzâniagrass (Panicum Maximum, Jacq. Cv Tanzania) Pasture Submitted To Regime Of Intermittent Stocking, Ana C. Ruggieri, Carlos A. M. Gomide, Estella R. Janusckiewicz, E. D. Contato, R. A. Reis
Herbage Accumulation And Vegetation Structure In Tanzâniagrass (Panicum Maximum, Jacq. Cv Tanzania) Pasture Submitted To Regime Of Intermittent Stocking, Ana C. Ruggieri, Carlos A. M. Gomide, Estella R. Janusckiewicz, E. D. Contato, R. A. Reis
IGC Proceedings (1997-2023)
Knowledge of pasture structure characteristics such as height, tillering density, leaf area index (LAI) and herbage mass (HM), together with growth rates and forage accumulation, can become important tools to indicate improvements to the production system. This experiment evaluated the structural and productive characteristics and persistence of a Tanzaniagrass pasture.
Performance Of Timothy Cultivars In Monoculture Or In Mixtures With Meadow Fescue In Finland, M. Kari, M. Rinne
Performance Of Timothy Cultivars In Monoculture Or In Mixtures With Meadow Fescue In Finland, M. Kari, M. Rinne
IGC Proceedings (1997-2023)
Timothy (Phleum pratense) and meadow fescue (Festuca pratensis) are dominating grass species in Nordic countries with severe winters. Dry matter (DM) yield potential, forage quality and winter hardiness are of main interest for commercial cultivars. Further, it is advantageous to take into account the relation between primary growth and regrowth (P/R) DM yield when planning mixtures for different purposes and areas. In the current experiment, three different types of timothy were evaluated: a northern type cv. Jonatan, a southern type cv. Ragnar and an intermediate type cv. Grindstad. In addition, meadow fescue cv. Kasper and mixtures …
Comparison Of A Biometric Method With Clipping And Weighing Method For Estimating The Yield Of Artemisia Sieberi (Case Study Zarand-E-Save Region), H. Dianati, M. Abedi, E. Shahriary, Hossein Arzani
Comparison Of A Biometric Method With Clipping And Weighing Method For Estimating The Yield Of Artemisia Sieberi (Case Study Zarand-E-Save Region), H. Dianati, M. Abedi, E. Shahriary, Hossein Arzani
IGC Proceedings (1997-2023)
Forage production is a most important vegetation attribute in rangeland analysis and evaluation and use in management practices. Artemisia sieberi covered about 47% of the rangeland area in Iran and scientists need to know the best method for analysis and evaluation of this species. Clipping and weighing has high precision, but this method is time-consuming and expensive and alternative methods are required. Russian scientists developed a biometric method based on plant dimensions and suggest this method for rangelands in the Middle East (discussed by Dianati, 2003). In America, Muray (1982) used plant dimensions for yield estimation and regression models for …
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
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 (1997-2023)
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.
Forage Yield And Structural Traits Of Tanzaniagrass (Panicum Maximum) At Four Canopy Heights, Carlos A. M. Gomide, Ana C. Ruggieri, R. A. Reis, J. A. Gomide, J. H. De A. Rangel, E. O. Almeida
Forage Yield And Structural Traits Of Tanzaniagrass (Panicum Maximum) At Four Canopy Heights, Carlos A. M. Gomide, Ana C. Ruggieri, R. A. Reis, J. A. Gomide, J. H. De A. Rangel, E. O. Almeida
IGC Proceedings (1997-2023)
Pasture forage production is based on the growth of tillers (Hodgson, 1990). Although the effect of canopy height and structural traits on productivity of temperate grasses are well known e.g. (Bircham & Hodgson,1983; Binnie & Chestnut, 1994) tiller studies on tropical pasture species are scarce.
The Effect Of Cutting Regime And Cultivar On Longevity Of Pure Lucerne Stands In Latvia, Z. Gaile
The Effect Of Cutting Regime And Cultivar On Longevity Of Pure Lucerne Stands In Latvia, Z. Gaile
IGC Proceedings (1997-2023)
Lucerne growing is important for high and excellent quality yields of hay or silage without application of N fertilisers, as well as for increasing crop diversity in crop rotation systems. It is comparatively expensive to establish lucerne stands in Latvia. Different aspects can affect longevity of lucerne stands: suitability of cultivar to specific conditions, soil characteristics, different stress conditions and cutting management, including frequency and height of cutting, and critical rest period in autumn (Sheaffer et al., 1988). The aim of our study was to evaluate the persistence of lucerne stands without renovation while obtaining reasonable yields.
Effect Of Utilisation Date On The Yield And Quality Of A Semi-Natural Grass Stand In Winter, Jiří Skládanka
Effect Of Utilisation Date On The Yield And Quality Of A Semi-Natural Grass Stand In Winter, Jiří Skládanka
IGC Proceedings (1997-2023)
Prolongation of the grazing period into the winter season reduces the costs of feedstuffs for dry cows. To enable the use of pastures in winter it is necessary to carry out the last cut or grazing cycle in June or July and to postpone the last grazing until the first week of August. (Opitz von Boberfeld, 1997). The time of the last utilisation in summer influences the yield and quality of herbage during the winter season (Bartholomew et al., 1997). This research studied changes in yield and quality of a semi-natural grass stand in autumn and in winter following …
Hybrids Between Meadow And Smooth Bromegrass: A New Forage Crop For Canada, B. E. Coulman, Y. S. N. Ferdinandez
Hybrids Between Meadow And Smooth Bromegrass: A New Forage Crop For Canada, B. E. Coulman, Y. S. N. Ferdinandez
IGC Proceedings (1997-2023)
Smooth bromegrass (Bromus inermis Leyss.) has been an important hay grass in the agricultural regions of western Canada for approximately 50 years. Meadow bromegrass (B. riparius Rehm.) has become the most important pasture species in this region over the last 15 years. It is possible to produce hybrids between these species, which could lead to the development of a type of bromegrass which would be useful for both hay and pasture purposes.
Breeding White Clover With Improved Tolerance Of Nitrogen Fertiliser, T. A. Williams, M. T. Abberton, P. Olyott
Breeding White Clover With Improved Tolerance Of Nitrogen Fertiliser, T. A. Williams, M. T. Abberton, P. Olyott
IGC Proceedings (1997-2023)
White clover (Trifolium repens L.) is often considered a forage legume with a primary use in 'low input/ low output' systems. One facet of this is the perception that the persistency of this species is poor when Nitrogen (N) fertiliser is applied. However, new varieties of white clover are able to play a significant role in highly productive systems (Williams et al., 2000) and show consistent yields over ten years at a range of applied N levels (Williams et al., 2003). Germplasm improvement for nitrogen tolerance has been carried out with the aim of not only allowing white …
Evaluation Of A White Clover Variety With Increased Resistance To Stem Nematode (Ditylenchus Dipsaci) Under Sheep Grazing And Cutting, T. A. Williams, M. T. Abberton, K. A. Mizen, P. Olyott, R. Cook
Evaluation Of A White Clover Variety With Increased Resistance To Stem Nematode (Ditylenchus Dipsaci) Under Sheep Grazing And Cutting, T. A. Williams, M. T. Abberton, K. A. Mizen, P. Olyott, R. Cook
IGC Proceedings (1997-2023)
Stem nematode (Ditylenchus dipsaci (Kühn) Filipjev) is a major pest of white clover (Trifolium repens L.) in UK pastures (Cook et al., 1992a) and in other parts of the world. In a previous trial, resistant and susceptible selections yielded the same in three years in the absence of the nematode but, on infested plots, the susceptible yielded the same as the resistant selection in year 1 but only 68 and 58% in years 2 and 3, as the nematode infestation increased (Cook et al., 1992b). We have now developed varieties with enhanced resistance to this pest …