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Articles 2191 - 2220 of 14407
Full-Text Articles in Entire DC Network
A Nursery Study Of The Interplay Between Soil Texture, Rooting Space, And Nurse Plants On Seedling Growth And Root Development In Woody Species Of Tamaulipan Thornscrub, Lance I. Santos
Theses and Dissertations
Reforestation attempts in semi-arid regions are plagued with seedling mortality. Blanket greenhouse practices may not be optimal, in addition, commensalism interactions between nurse plants are considered. To better understand the effects of soil texture and nurse plant interactions on growth and drought tolerance, two experiments were developed. For soil texture, Border palo verde seedlings were grown in different-sized plant bands with three soil types. To observe the effects of nurse plants, an experiment using guayacan, was developed using Texas Ebony, as a leguminous nurse plant. Plants were also exposed to a drought experiment. The results suggest that some soil textures …
Evaluation Of Industrial Hemp Cultivar And Biochar Rate To Remediate Heavy-Metal-Contaminated Soil From The Tar Creek Superfund Site, Usa, Dietrich V. Thurston, Kristofor R. Brye, David M. Miller, Philip A. Moore Jr., Donald M. Johnson, Mike Richardson
Evaluation Of Industrial Hemp Cultivar And Biochar Rate To Remediate Heavy-Metal-Contaminated Soil From The Tar Creek Superfund Site, Usa, Dietrich V. Thurston, Kristofor R. Brye, David M. Miller, Philip A. Moore Jr., Donald M. Johnson, Mike Richardson
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Soil contamination by cadmium (Cd), lead (Pb), and zinc (Zn) at the Tar Creek superfund site in northeast Oklahoma, United States, remains a threat to the environment and local ecosystem. Phytoremediation with industrial hemp (Cannabis sativa L.) and the use of biochar (BC) have been independently shown to be effective methods to remediate heavy-metal-contaminated soils. The objective of this greenhouse study was to evaluate the effects of industrial hemp cultivar (‘Carmagnola’ and ‘Jinma’), biochar rate (0, 2, 5, and 10% by volume), soil contamination level (low, medium, and high), and their interactions on above- (AG) and belowground dry matter …
Rice Response To Struvite And Other Phosphorus Fertilizers In A Phosphorus-Deficient Soil Under Simulated Furrow-Irrigation, Jonathan B. Brye, Diego Della Lunga, Kristofor R. Brye
Rice Response To Struvite And Other Phosphorus Fertilizers In A Phosphorus-Deficient Soil Under Simulated Furrow-Irrigation, Jonathan B. Brye, Diego Della Lunga, Kristofor R. Brye
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Wastewater-recovered phosphorus (P), in the form of the mineral struvite (MgNH4PO4⋅6H2O), may provide a sustainable alternative to decreasing rock-phosphate reserves. Struvite can be generated via precipitation methods, potentially reducing the amount of P runoff to aquatic ecosystems. The objective of this greenhouse tub study was to evaluate the effects of chemically- and electrochemically precipitated struvite (CPST and ECST, respectively) on above- and belowground plant response in a hybrid rice (Oryza sativa) cultivar grown using furrow-irrigation compared to other common fertilizer-P sources [i.e., triple super phosphate (TSP) and diammonium phosphate (DAP)]. Rice was …
Landslide Inventory And Unstable Slope Monitoring Along Highways In Eastern Tennessee, Robert Mcsweeney
Landslide Inventory And Unstable Slope Monitoring Along Highways In Eastern Tennessee, Robert Mcsweeney
Electronic Theses and Dissertations
This research introduces an unstable slope management program (USMP) for Tennessee based on federal slope management standards, along with improved methods for landslide monitoring with unmanned aerial systems (UAS) lidar and photogrammetry. In mountainous regions, monitoring slope hazards is a critical function of transportation management. A mobile field assessment form created with Survey123 was used to collect 22 unstable slope ratings in eastern Tennessee. Location points were appended with photographs, notes, and site information. Landslide scores ranged from 325 (Fair) to 1005 (Poor). UAS monitoring of a slow-moving soil landslide along I-40 near Rockwood, TN, produced high-resolution lidar and photogrammetry …
Carbon Dioxide Dynamics In The Carbonate Critical Zone, Savoy Experimental Watershed, Arkansas, Usa, Michael Darvin Jones
Carbon Dioxide Dynamics In The Carbonate Critical Zone, Savoy Experimental Watershed, Arkansas, Usa, Michael Darvin Jones
Graduate Theses and Dissertations
The dynamics of carbon dioxide (CO2) within the Earth’s critical zone (CZ) are essential for driving spatial and temporal variations of carbonate dissolution and precipitation, which are fundamental to subsurface porosity and permeability development. However, there is still a significant knowledge gap regarding the patterns of CO2 transport and production within the carbonate critical zone (CCZ). In this study, we investigated these dynamics within a mantled karst terrain at the Savoy Experimental Watershed (SEW) in Northwest Arkansas.
Previous monitoring of partial pressure of CO2 (PCO2) and dissolution rates at karst springs in …
Impact Of Young Biocrust On Dryland Surface Albedo, Rhynhardt Mudde, Rebekah Magness, Raul Roman, Nicole Pietrasiak
Impact Of Young Biocrust On Dryland Surface Albedo, Rhynhardt Mudde, Rebekah Magness, Raul Roman, Nicole Pietrasiak
Undergraduate Research Symposium Posters
More than 40% of the Earth’s surface is covered by drylands. Due to limited availability of water, less surface area is covered by vascular plants. Instead, this space is occupied by microbial communities that exist in close contact with mineral soil, creating a living aggregate on the upper soil layer and are known collectively as biological soil crusts or “biocrusts”. Biocrusts play a vital role in ecosystem functioning in drylands specifically through their influence on hydrological processes (e.g., water retention, infiltration). However, the impact of biocrusts on evaporation is not well understood. Biocrusts have been reported to either increase or …
Assessing Ectomycorrhizal Advantage On Tree Species Within Differing Soil Materials In Spring Mountains, Nevada, Kirsten Soriano, Riley Jones, Daniel Thompson
Assessing Ectomycorrhizal Advantage On Tree Species Within Differing Soil Materials In Spring Mountains, Nevada, Kirsten Soriano, Riley Jones, Daniel Thompson
Undergraduate Research Symposium Posters
Ectomycorrhizal fungi (ECM) form symbiotic relationships with their partner plant, creating root systems which allow for the exchange of nutrients among connected plants. The Spring Mountains National Recreation Area (NRA) in Southern Nevada is the study site for examining ECMs due to its diverse ecosystem with numerous inhabiting species. To assess the effects of ECMs on the tree composition, literature review was conducted to outline previous methods. Through data analysis and observations of the sample sites, it is concluded that ECMs are highly likely to have an effect on tree composition of the Spring Mountains NRA. The purpose of this …
New Ichnofossil Discovery In Mallorcan Caves: Linking Ancient And Moden Bat-Ectoparasites Coporolites., Antonio Merino Juncadella, Joan J. Fornós, Antoni Mulet, Joaquin Gines
New Ichnofossil Discovery In Mallorcan Caves: Linking Ancient And Moden Bat-Ectoparasites Coporolites., Antonio Merino Juncadella, Joan J. Fornós, Antoni Mulet, Joaquin Gines
International Journal of Speleology
Bat ectoparasitic ichnofossils can be useful to elucidate microbial mediation in mineralization processes of organic material, supplying valuable information on ancient parasitology and palaeoecology, among other topics. Rod-shaped features found in Cova des Pas de Vallgornera (Mallorca, Spain) are described for the first time. They are related to an ancient bat colony inhabiting the cave in the Early Pleistocene. These micro-morphologies are cylindrical in shape with sizes of a few hundred microns in length and less than one hundred microns in diameter. They are composed by a mash of microscopic calcite particles of different sizes and shapes, lying on deposits …
Towards An Ideal Seed Coating, J M. Scott
Towards An Ideal Seed Coating, J M. Scott
IGC Proceedings (1977-2023)
Coated pasture seeds have been formulated in the past based largely on "trial and error" with relatively few objective criteria being employed to define desirable formulations, A description of desirable propelties of various layers of seed coatings and of the seeds themselves is presented.
Lolium Endophyte Viability: Effect Of Seed Storage, M P. Rolston, J R. Crush, M D. Hare, K K. Moore
Lolium Endophyte Viability: Effect Of Seed Storage, M P. Rolston, J R. Crush, M D. Hare, K K. Moore
IGC Proceedings (1977-2023)
The effects of seed storage on the endophyte Acremonium lolii in ryegrass (Lolium perenne L.) were evaluated over 7 years. The long• term effects of 4 seed moisture contents (SMC) 8.6-13.1 %: tempemture (ambient, 5, O, -15°C) 'aitd packaging types: calico, polyethylene fi,Jm. 9-140 µm, and aluminium-polyethylene (AIP) on endophyte viability were assess·ed. • Endophyte viability was maintained by lower seed moisture content and low temperatures. In ambient warehouse conditions endophyte viability declined to zero in 12 months in calico bags,' but was maintained for 3 years at 8.6% SMC in AIP: • Endophyte viability was maintained for …
Effect Of Dormancy-Releasing Treatments On Germination Of Bahiagrass Seed, J. Jeffrey Mullahey, D S. Fisher
Effect Of Dormancy-Releasing Treatments On Germination Of Bahiagrass Seed, J. Jeffrey Mullahey, D S. Fisher
IGC Proceedings (1977-2023)
Low seed germination and dormant seed in bahiagrass (Paspalum nonatutum Flugge.) necessitate high seeding rates for successful pasture establishment. A study of dormancy-releasing treatments and age of seed on germination of bahiagrass was conducted in an incubator at the Southwest Florida Research and Education Center near Immokalee, Florida. Five seed treatments (Crop-Start (Solid Matrix Seed Priming, Kamterter Products Inc., Lincoln, NB), potassium nitrate (KNO3), heat/humidity, palea removed, and a check), 2 cullivars (Pensacola, Tifton 9) of bahiagrass and 2 ages (10 and 16 months) of seed were used. A significant (P<0.05) age ·x treatment interaction occurred for all response variables. Based on total germination at 28 days, % dormant seed and rate of germination, Crop-Start and heat/humidity were consistently the best treatments. Additional research on germination with dormancy-releasing treatments is needed to study the Interaction of seed age and bahiagrass cultivar.
Weed Seed Contamination: Use Of A Seed Testing Database To Identify Processing Limitations, J S. Rowarth, M P. Rolston, A A. Johnson
Weed Seed Contamination: Use Of A Seed Testing Database To Identify Processing Limitations, J S. Rowarth, M P. Rolston, A A. Johnson
IGC Proceedings (1977-2023)
A computerised database maintained by the Official Seed Testing Station of New Zealand provided the opporlunity to survey weed seed contamination in clover and grass seed-lots. Broad-leaf weeds such as Slierardia arvensis, Stellaria ,nedia and Chenopodium album were the major contaminants in Trifolium repens seed-lots. In grass seed-lots the main contaminants were seeds of other grasses such as Bromus hordaeceus, Vulpia spp. and Holcus lanatus. Weed seeds were found to be a major reason for downgrading or rejection from certification of clover and grass seed-lots in New Zealand; this reflects strict quality control measures.
An Investigation In To The Effect Of Some Factors On The Germination Of Erodium Seeds, Myrna Johnston, Alfredo Olivares, Gladys Fernandez
An Investigation In To The Effect Of Some Factors On The Germination Of Erodium Seeds, Myrna Johnston, Alfredo Olivares, Gladys Fernandez
IGC Proceedings (1977-2023)
Erodiurn seeds present variable dormancy in and even within each species. Thus, it is important to know the factors that determine this variation as related to the persistence of its species. E. rnoschatmn and E. rnalacoides seeds were collected at the end of the annual cycle at La Rinconada de Maipli (33°28'S and 7S050'W). Effects of seed sour.ce (collecting in 1986, 1988 and 1990), age (keeping seeds under laboratory conditions) and maternal factors (cutting plants at early flowering) were analysed. Seeds were tested for germination capacity and germination rate at a constant temperature of 15°C on Petri dishes provided with …
Long-Term Seed Dormancy In Poa Pratensis L. Northern Norway, Trygve S. Aamlid, Dagfinn Arntzen
Long-Term Seed Dormancy In Poa Pratensis L. Northern Norway, Trygve S. Aamlid, Dagfinn Arntzen
IGC Proceedings (1977-2023)
Inadequate gennination has often been obseived when planting Poa pratensis L. cv. Lavang (69°N) in northern Norwegian grasslands. This investigation was intended to elucidate whether this was due lo longterm seed dormancy, Seed-lots grown in different years in northern and southern Norway and stored at O-to•c, were germinated in Jakobsentype germinators al various combinations of temperature and light. Significant dormancy was expressed at 21 °C even after 10 years of storage. Al this constant temperature, germination was promoted by 8 h fluorescent light compared with darkness and continuous light. Al 21/ I 2°C alternating temperature, seed genninated well irrespective of …
Seed Vigour In Lucerne And White Clover, Y R. Wang, J G. Hampton
Seed Vigour In Lucerne And White Clover, Y R. Wang, J G. Hampton
IGC Proceedings (1977-2023)
Accelerated ageing (AA) was used to assess the seed vigour of 5 lucerne (Medicago sativa L, cv. Wairau) and 8 white clover (Trifolium repens L. cv. Grasslands Huia) seed-lots. Germination prior to AA ranged from 86-94% and 87-94% for the lucerne and white clover seed-lots respectively. All seed-lots hl\d been harvested in 1988 and were certified either as basic or first generation. Germination after 72 h at 40:t0.5°C (AA test) ranged frcim 31-76% for the lucerne seedlots and 15-56% for che white clover seed-lots, indicating significant differences in seed.vigour among lots of both species. Time of ageing influenced …
Growing Methods For The Morphological Assessment Of White Clover Cultivars Purity, J G. Hampton, E J. Musukwa
Growing Methods For The Morphological Assessment Of White Clover Cultivars Purity, J G. Hampton, E J. Musukwa
IGC Proceedings (1977-2023)
Three growing methods (field sward, field spaced plants, glasshouse plants) were compared for the morphological assessment of white clover (Trifolium repens L.) cultivar purity. Three cerlified (breeders, basic and first generation) seed-lots of cv. Grasslands Kopu and one first generation Kopu seed lot which had been mixed with seed of another cultivnr (10:1) were used to generate data. After analysis of variance (ANOVA), significant (P<0.05) reductions from the breeders seed lot siandnrd for leaf size, stolon number and leaf length/width ratio were recorded for the mixed seed· 101 in nil three growing methods, and for petiole length with the sward method only. With the glasshouse and spaced-plant melhods, slolon numbers of the basic and first generation seed-lots were reduced (P<0.05), while leaf size was lower (P<0.05) for the first generation seed-lot in lhe glasshouse. However, under OECD certification requirements, leaf size of the mixed seed lot was the only characler for which "off types" were detecled. Data coefficients of variation were no greater for the glasshouse method than the required OECD plot-test method.
Importance Of Tropical Pasture Seed Quality And Factors Affecting It In Smallholder Farming System, H F. Chin, C C. Wong
Importance Of Tropical Pasture Seed Quality And Factors Affecting It In Smallholder Farming System, H F. Chin, C C. Wong
IGC Proceedings (1977-2023)
Most tropical pastures are associated with and confined to smaJlholder animal production in developing countries of the tropics, with the exception of Australia. At present, tropical pasture seeds are very variable and poor in quality, as tropical herbage seed production is relatively new compared with that for temperate systems. Many tropical species are relatively wild and have yet to be domesticated and selected for pasture use, let alone for seed production characteristics. The unfavourable production and storage environment of the wet tropics, coupled with a lack of appropriate technology, also contributes towards poor quality in tropical pasture seeds. In this …
The Benefits Of Seed Quality In Intensive Temperate Forage Systems, Jeffrey J. Steiner
The Benefits Of Seed Quality In Intensive Temperate Forage Systems, Jeffrey J. Steiner
IGC Proceedings (1977-2023)
Seed quality has traditionally been considered to consist of two components: physiologic and genetic quality. The benefits of using high quality seeds have been widely documented and are generally not questioned. These henefits came about as a result of a firstgeneration of seed quality aware11ess which began more than a century ago. In intensive temperate forage production systems, the producer usually has a ready supply of high-quality seeds available for purchase. For the consumer, seed quality is not a major constraint to system productivity, However, many forage producers are not realising all of the potential benefits from using high quality …
New Realities For The Management Of Tussock Grasslands In New Zealand, I.G C. Kerr
New Realities For The Management Of Tussock Grasslands In New Zealand, I.G C. Kerr
IGC Proceedings (1977-2023)
Concerns about the potential demise of the tussock grasslands of the Soulh Island of New Zealand have been well recorded in the scientific and official literature. Little effective action has been taken to arrest the process of land degradation that has occurred during the 125 years of utilisation of !he tussock grasslands for pastoralism. A substantial decline in the pastoral productivity and conservation value of the "unimproved" tussock grasslands has been the result, Much of the cause has been the failure of the administrators and the occupiers of the high country to understand, and act on, the evidence. Occupiers and …
Integration Of Recreation With Pastoral Use And Conservation In The High Country Of South Island, New Zealand, P H. Murray, D M. Robertson, C R. Mason
Integration Of Recreation With Pastoral Use And Conservation In The High Country Of South Island, New Zealand, P H. Murray, D M. Robertson, C R. Mason
IGC Proceedings (1977-2023)
Over 3 000 000 ha of the South Island high country is Crown (i.e. Govemmcnt)-owned land, held under pastoral lease or conservation estate. There is increasing pressure from recreationists for access to land under both tenures. Permits from Crown agents, with agreement from land occupiers, are required for commercial recreation. Access for non-commercial recreation on pastoral lease land is generally through direct negotiation with the lessee. Conflicts between high country users are occurring where recreation pressure is greatest. A case study in the Remarkables Range near the mountain resort of Queenstown, shows domination by the primary users (pastoral lessees and …
Tradition And Pastoral Sustainability- An Exercise In The Applied Human Ecology Of Mountain Rangelands, David Pitt
Tradition And Pastoral Sustainability- An Exercise In The Applied Human Ecology Of Mountain Rangelands, David Pitt
IGC Proceedings (1977-2023)
The paper presents the case for regarding some traditional practices and customs as a ba��e for sustainable development in winter cold temperate rangeland pastoralism, The emphasis is on the social forms which maintain a system in which low intensity production, usufruct, kinship dynamics, co-operation, environmentally friendly practices and nomadism are maintained in the face of extreme outside pressures, A typology is elaborated including five situations: independence, coexistence, fluctuation, absorption and interaction. Case studies _are presented from the Middle East, Andes, North Africa, the Alps, the Himalaya and the former Soviet Union. Although these situations are basically historical, or at best …
Integration Of Pastoral And Non-Pastoral Uses On Temperate Rangelands With Cold Winters In Developed Countries, T J. Maxwell, W A. Laycock
Integration Of Pastoral And Non-Pastoral Uses On Temperate Rangelands With Cold Winters In Developed Countries, T J. Maxwell, W A. Laycock
IGC Proceedings (1977-2023)
The demands of the relatively wealthy and sophisticated societies of developed countries, with their substantial amounts of leisure time and discretionary income, are having an increasing impact on temperate rangelands in a variety of ways. Some parts of these societies are concerned to protect the landscapes, habitats, wildlife and solitude that can be found there, and wish to constrain any further development within these ecosystems; others also wish .to gain ready access to these resources for hunting, recreation and sport and believe that this requires the exclusion of domesticated livestock. Temperate rangelands are frequently used as water catchments and some …
Effects Of Date Of Harvest On Yield And Quality Of Meadow Fescue Seed, Uwe Simon
Effects Of Date Of Harvest On Yield And Quality Of Meadow Fescue Seed, Uwe Simon
IGC Proceedings (1977-2023)
A seed-shattering-resistant cultivar and a normal cultivar of meadow rescue (Festuca pratensis Huds.) were harvested for seed 10 times in regular intervals during a period of 30 days, The effects of harvesting time on yield, water content, germination and weight of seeds, and on costs of seed processing were studied in the 2 types of cultivar. Yield losses due to premature harvest were greater than losses due to delayed harvest. Seed losses due to shattering were smaller in the shattering-resistant cultivar compared with the normal cultivar. The water content of the seeds decreased with advancing maturity, from =50% to .. …
After-Effects Of Grass Seed Production On Subsequent Field Crops, Uwe Simon
After-Effects Of Grass Seed Production On Subsequent Field Crops, Uwe Simon
IGC Proceedings (1977-2023)
Forage grasses grown for the production of seed are usually components of a crop rotation. The after-effects of 3 grass species compared with 4 crop species on the yields of 5 field crops in the first and second year after grass seed harvest were investigated. Significant differences between the grass species, and between grasses and other field crops on subsequent crops, and between the subsequent crops in their reactions to the preceding crops were obvious in both years after grass seed harvest, Annual and perennial ryegrass excited the most positive effects on subsequent crop yields. Corn and sugarbeets responded particularly …
A New Power Airflow Harvester Improves Grass Seed Yield And Quality In Central Queensland, Australia, J H. Wildin, Dingfa Zhou, A Dobson
A New Power Airflow Harvester Improves Grass Seed Yield And Quality In Central Queensland, Australia, J H. Wildin, Dingfa Zhou, A Dobson
IGC Proceedings (1977-2023)
Most perennial tropical grasses produce new seedheads over a period extending up to 4 weeks, Seeds mature and ripen up to 4 weeks after inflorescence emergence. The dilemma for seed producers using onepass harvesting has been to time the harvesting operation to maxmise. recovery of mature seed, Harvested immature seeds and inert material adversely affect seed purity and germination tests. Light fluffy seeds such as buffel and bluegrasses are generally difficult to harvest with grain crop harvesters, and paddle beater harvesters have been used for simplicity and economy. Over the last 3 years, tractor-mounted brush harvesters using 4 rows of …
Evaluation And Development Of Brush Harvesting For Chaffy-Seed Grasses In Queensland, Australia, T A. Jensen, D S. Loch, B G. Robotham
Evaluation And Development Of Brush Harvesting For Chaffy-Seed Grasses In Queensland, Australia, T A. Jensen, D S. Loch, B G. Robotham
IGC Proceedings (1977-2023)
Lack of an effective seed harvester has limited the commercial availability of many chaffy-seeded grasses in Australia. A brush harvester similar to the Woodward Plail-Vac. Seed Stripper was evaluated successfully across a range of chaffy-seeded grasses in southern Queensland. A second machine with increased harvesting and storage capacity plus a facility for primary cleaning of seed was designed and built for large-scale commercial use. A third harvester is currently being developed for opportunist harvesting of small discontinuous seed areas, particularly of chaffy-seeded native grasses in the, semi-arid mulga lands in south-western Queensland; it is designed for low-cost construction and maintenance …
The Woodward Flail-Vac Seed Stripper: Recent Progress In Harvesting Chaffy Seed, C L. Dewald, P L. Sims, L M. White
The Woodward Flail-Vac Seed Stripper: Recent Progress In Harvesting Chaffy Seed, C L. Dewald, P L. Sims, L M. White
IGC Proceedings (1977-2023)
The Woodward Flail-Vac Seed Stripper was developed and tested in Woodward County, Oklahoma during 1980-82. Since its introduction we estimate that more than 500 strippers are now used to harvest the majority of seed used to establish over one million ha of Old World bluestem (OWB) grasses. Recent progress includes manufacture of units from aluminum with 40% less weight, and modifications to allow for multiple harvests. Lower brush rotation speeds resulted in a higher quality product and were less destructive lo immature seed heads, A 25 mm increase in brush diameter and· a redesigned shroud increased the air flow and …
Mechanical Harvesting And Processing Of Temperate Zone And Tropical Pasture Seed, J M. Hopkinson, P.T P. Clifford
Mechanical Harvesting And Processing Of Temperate Zone And Tropical Pasture Seed, J M. Hopkinson, P.T P. Clifford
IGC Proceedings (1977-2023)
Temperate zone herbage seed harvesting continues to evolve round combine•harvesters designed principally for large-seeded grain and pulse crops. Most research emphasis has been placed on increasing efficiency of systems for presenting the crop to the auger platform. Timing of harvest, precutting treatment, cutting and pickup alternatives including airblast assistance vary in relation to species and environmental conditions. With the development of drying-cooling systems considerable advantages in the harvesting and processing of grass seed have occurred. An understanding of the range and use of seed cleaning equipment available to meet purity standards is given, along with additional options to meet end.user …
Harvesting And Processing Techniques Of Tropical Grass And Legume Seeds For Smallfarmers, Lumyai Kowithayakorn, Chaisang Phaikaew
Harvesting And Processing Techniques Of Tropical Grass And Legume Seeds For Smallfarmers, Lumyai Kowithayakorn, Chaisang Phaikaew
IGC Proceedings (1977-2023)
For smallfarmers of forage legumes and grasses in Thailand, manual harvesting and cleaning of leguminous seeds have been widely practised because of cheap and available labour. Tropical grasses produce more seeds than can be harvested; hence it is necessary to find means to improve harvesting and processing techniques in order to obtain high standards of both quality and quantity of seed. The main obstacles could be due to prolonged flowering nnd grain filling periods of individual seedheads resulting in the uneven ripening of seeds at harvest. Premature seeds cause low yields and low quality nt harvests in many species. Flowering …
Effects Of Seedbed Environment Of Germination And Seedling Establishment Of Spiny Hopsage (Grayia Spinosa [Hook.] Moq.), Nancy L. Shaw, Marshall R. Haferkamp
Effects Of Seedbed Environment Of Germination And Seedling Establishment Of Spiny Hopsage (Grayia Spinosa [Hook.] Moq.), Nancy L. Shaw, Marshall R. Haferkamp
IGC Proceedings (1977-2023)
This study exam!ned the influence of seedbed micro-environment on germination and seedling establishment of spiny hopsage (Grayia spinosa (Hook.J Moq.) in the shrub steppe of western North America. Two seed collections were drilled in late autumn, early spring and late spring 1987-88. With low precipitation, seedlings established only from late-autumn plantings (