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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 25 for “"seedbed"”.
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An analysis of firm dynamics and seedbed role
… of firm births and deaths, and how the seedbed role influences the performance of new start-ups. This analysis provides several contributions to the literature. Firstly, the competition and multiplier effects set out by Johnson and Parker (1994) are examined and particular interest is …
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A procedure for laboratory seedbed tests with undisturbed soil
Thesis (M.S.)--Michigan State University, Dept. of Agricultural Engineering, 1964
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Relationships between seedbed preparation and growth of corn and tobacco plants
The objectives of the investigation were to evaluate no tillage and tillage by plowing with respect to yield of tobacco and corn plants and to compare uptake of P by corn plants from surface and mixed applications of superphosphate. A further aim was to determine the relationship between P uptake …
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Fate of Eucalyptus marginata seed from canopy-store to emergence in the northern jarrah forests of Western Australia: Research to help improve regeneration following shelterwood treatment
… of seed and the creation of a suitable seedbed are recognised as important factors limiting seedling recruitment. A silvicultural method commonly used across northern and eastern jarrah forest blocks is shelterwood cutting. The primary objective of treating jarrah forest to shelterwood …
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The effects of harvest intensity and seedbed type on germination and early survival of balsam fir and white spruce in the southern boreal forest
The effects of harvest intensities and seedbed type on germination success and early (first summer) survival for balsam fir ( Abies balsamea (L.) Mill) and white spruce ( Picea glauca (Moench) Voss) were examined. The harvest intensities canopies included a 1/3 rd and 2/3 rd partial cut, a clearcut …
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Corn planting methods in Virginia's residue mulch
… of planting corn in a vegetative residue mulch seedbed which would result in stand and yields as good as obtained in planting in a conventionally prepared seedbed. Yields obtained in the first experiments in Virginia were very low because methods used in preparing the mulch seedbed, which had …
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Sexual recruitment of trees following fire in the southern mixedwood boreal forest of Canada
… densities of germinants as a function of seedbed type. Field observations indicate that there are significant differences in seedbed frequencies between sites. The study also demonstrates that all species establish preferentially around tree boles where there is exposed mineral soil and …
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Conservation tillage machinery for broccoli production
… developed and tested. FOR2 prepares the seedbed and places the seed in one pass through the field. This thesis reports the qualitative and quantitative evaluation of FOR2 based on result from two experiments. The first experiment evaluated broccoli emergence under three different tillage …
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Big Bluestem (Andropogon Gerardi) and Indiangrass (Sorghastrum Nutans) Establishment Using Minimum-Till Seeding Methods
… the spring into a clean-till (well prepared) seedbed. A Truax warm-season grass drill was used for seeding. Glyphosate [N-(phosphonomethyl) glycine] was applied during both the fall and sping on some plots to kill the existing vegetation. The clean-till seeding method produced more stems of …
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The effects of fertilisers, particularly foliar applied, on the potato plant's tolerance of attack by the potato cystnematodes, <i>Globodera rostochiensis</i> and <i>G. pallida</i>
… as foliar applied nutrients effectively replaced seedbed application, increased the nutrient concentrations within the plants and gave equivalent or higher tuber yields than in plants receiving all of the fertiliser in the seedbed. Applying all of the recommended quantity of N in the seedbed at …
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No-Till Tomato Production
… been a way to manage weeds and prepare a seedbed. No-till vegetable production can ameliorate the ill-effects of tillage in an economically effective way but has not been studied much in California. The objective of this thesis was to determine the viability of no-till vegetable cropping …
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Efficacy of Hercides for weed control in soyabean(glycine max)under a no-Tillage cultivation system in Zambia
… and 28 days after planting) and no weeding. The seedbed was prepared by two applications of 0.6 kg a.i/ha paraquat before planting and this effectively controlled the first and second flush of weeds respectively. However, Euphorbia heterophylla recovered from the application of paraquat whereby …
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Adoption and Impacts of IPM for Cambodian Rice Farmers
… practices include pest-resistant variety; stale seedbed (sequential harrowing or harrowing followed by a non-selective herbicide); apply Trichoderma on seeds or seedlings, no insecticide spray for the first 40 days; apply bio-pesticides such as neem, Bt, and metarhizium, and Beauvaria; …
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ESTABLISHMENT AND GROWTH OF ANNUAL AND PERENNIAL GRASSES ON COPPER MINE TAILING SLOPES (ARIZONA).
… aided in its breakdown and helped prepare a good seedbed. The spike-tooth chain drag produced better growth than the sheepfoot roller, possibly due to excessive soil compaction with the sheepfoot roller. Capping tailing slopes with desert soil produced the most significant improvements in barley …
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Long-term effects of prescribed fire on vegetation structure, dynamics, and tree growth in red pine (Pinus resinosa Ait.) forests in north central Minnesota.
… and that further alteration to overstory and seedbed conditions would be needed to secure new cohorts of this species.
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Alexandrium catenella cyst dynamics in a coastal embayment : temperature dependence of dormancy, germination, and bloom Initiation
… promotes efficient conversion from the cyst seedbed to the spring bloom inoculum. The dormancy mechanism characterized here may be present in other cyst-forming dinoflagellates, but there is likely plasticity that reflects the temperature regime of each habitat.
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Analysis of soil compaction and furrow depth from planter row unit
… the planter row units affect soil structure and seedbed quality. The findings will help lay the foundation for future work to improve planter design, reduce soil compaction, increase seeding accuracy, and subsequently improve crop emergence.
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Alexandrium catenella cyst dynamics in a coastal embayment : temperature dependence of dormancy, germination, and bloom initiation
… promotes efficient conversion from the cyst seedbed to the spring bloom inoculum. The dormancy mechanism characterized here may be present in other cyst-forming dinoflagellates, but there is likely plasticity that reflects the temperature regime of each habitat.
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Costs of Reclamation on Southern Appalachian Coal Mines: A cost-effectiveness analysis for reforestation versus hayland/pasture reclamation
… requires more grading passes to prepare the seedbed, requiring four passes. Forestry reclamation typically involves only grading the site with one dozer pass to prevent compaction of minesoils which inhibits tree growth. Hyrdoseeding costs are also higher for hayland/pasture reclamation due …
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The Use of Veld Restoration Techniques for Rehabilitating Degraded Waterberg Mountain Bushveld in Lapalala Wilderness Reserve, Limpopo Province
… However, where soil ripping, seed sowing, seedbed compaction, and brush-packing were applied, significantly more biomass was produced, resulting in sustainable growth of grass plants. The research outcomes highlight several key principles for the use of rangeland rehabilitation strategies …
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