Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 19 of 19 for “"Yield Gains"”.
-
Comparison of Variety Performance Trials and Farm Level Yield Gains of Wheat Varieties Adopted in Saskatchewan
… variety adoption, considering factors such as yield potential, weed, pest, and disease resistance, and climatic adaptability. These variety performance trials, however, are conducted under controlled conditions that may not adequately reflect real-world farming or heterogeneity in yield across …
-
Mapping of brown stem rot resistance, genetic yield gains, and yield impact of soybean cyst nematode
… of this study was to quantify genetic change in yield and other traits that occurred during the past 80 yr of North American soybean breeding in maturity groups (MGs) II, III, and IV. Historic sets of 60 MG II, 59 MG III, and 49 MG IV soybean cultivars, released from 1923 to 2008, were evaluated …
-
Physiological mechanisms of yield improvement in historical U.S. soybean germplasm
… of protein and oil for food and feed. Soybean yields have increased substantially throughout the past century with yield gains widely attributed to genetic advances and improved cultivars, as well as advances in farming technology and practice. Although soybean yields do not appear to be …
-
Evolution of Bacillus thuringiensis Maize Yields in South Africa
… the potential impact of insect resistance on yields and estimates the economic and food availability impacts of genetic deterioration of Bt maize. Using data from South African National Maize Cultivar trials from 1989-2018, yield gains from Bt are observed to peak for Bt maize in 8 provinces …
-
The Effect of Leadership Training on Manufacturing Productivity of Informal Leaders
… training, given to non-management employees, may yield gains in manufacturing productivity.
-
Examining The Influence Of Professional Learning Communities On Grit And Social-Emotional Skill Development In Students And Collective Teacher Efficacy Within A Middle School
… central focus on social-emotional learning could yield growth in such student skills as perseverance and grit, collaboration, and communication. These findings, while inconclusive, provide a glimpse into the potential of this practice and may inform future decisions concerning planning for and …
-
Salt-tolerant rice variety adoption in the Mekong River Delta
… inconclusive evidence is found of higher yields of CURE-related varieties in a low-salinity year. Further, any yield gains are more than off-set by lower market prices for CURE-related varieties.
-
Linear Programming Decoding for Non-Uniform Sources and for Binary Channels With Memory
… Simulations show that the modified decoders yield gains over the standard LP decoder. Next, LP decoding is considered for two channels with memory: the binary additive Markov noise channel and the infinite-memory non-ergodic Polya-contagion channel. For the Markov channel, no linear cost …
-
Genetic gain X management interaction in soybean: seeding rate effect
Plant breeders have increased genetic yield potential of soybean during the past century. The plant characteristics which soybean breeders have selected that have contributed most to those yield gains are not well understood. The hypothesis states that plants from recently released cultivars can …
-
Yield Improvement in Eastern Soft Red Winter Wheat from 1919 to 2009
Periodic evaluation of improvements in yield and disease resistance is necessary to assess breeding progress over time, and the elucidation of underlying traits responsible for yield gains can help direct future breeding. Objectives of this study were: 1) to determine the rate and magnitude of …
-
Using spontaneous haploid genome doubling to access favorable alleles in exotic maize (Zea mays L.) germplasm
… mays L.) breeding contributed to significant yield gains in the past decades. However, it has been accompanied by narrowing its germplasm base. Breeding from exotic maize germplasm, such as BS39, provides a unique opportunity for broadening the genetic base of US Corn Belt germplasm. The in …
-
Techno-economic analysis of a rapid phenotyping rover
… the physical traits of plants to identify high yielding crop varieties would fit in the current agricultural market by assessing historical crop production, similar technology currently available, and stakeholders, and develops a ten-year forecast of yields. The research investigates the …
-
Optimum plant density for crowding stress tolerant processing sweet corn in the Upper Midwest
Advances in grain yield of field corn (Zea mays L.) over the last quarter century have been driven in large part by the ability of modern hybrids to better tolerate higher plant densities (i.e., crowding stress) than their predecessors. Yield gains in processing sweet corn, however, pale in …
-
Effects of Corn (Zea mays L.) Stover Removal and Leaching on Soil Test and Whole Plant K Levels in Corn and K Fertilization/High-Input Treatments on Soybean Using Site-Specific Management to Increase Soybean (Glycine max) Production in South Dakota
… for optimal plant growth in addition to grain yield. An experiment was conducted in Aurora, SD, USA, to observe the effects of corn stover removal on water soluble and exchangeable soil test K+ (STK) levels and corn grain yields across a five-year period. Abundant K+ reserves were recorded …
-
Dialing in the most corn-profitable and environmentally responsible nitrogen rate
… triamide (NBPT)]. Measurements included grain yield, plant total N uptake (TNU), soil total inorganic N (TIN) at various depths within the top 90 cm, canopy sensing for N management, and N loss measurements of nitrate (NO3-N) leaching, ammonia (NH3-N) volatilization, and nitrous oxide (N2O-N) …
-
Exploitation of nonadditive variance through nonrandom mating
… represent the range of recent estimates for yield and type traits. A total of 400 bulls were grouped by .99, .85, and .70 PTA reliability, with the first group being sires and mgs of the others. Using recurrence equations for combination effects, a matrix of true combination effects among the …
-
Evaluating the recyclability of wet-strength sacks and liquid packaging board through repulping
… LPB to improve fibre recovery, evaluating pulp yield, fibre length, and filtrate quality, to assess industrial viability. Repulping experiments of PAE-based WS Sacks and LPB were conducted at 60 oC using a laboratory-scale Helico repulper operating at 750 rpm. For WS Sacks, dual chemical dosing …
-
Essays on innovation in the U.S. corn and soybean seeds
… held by farmers. The second essay examines the yield gain from GE maize adoption and uses it as a yardstick to gauge the scope of innovation required to adapt to anticipated damage from future climate change. The research draws on the observed county-level maize yields and historical weather …
-
Evaluation of soybean aphid resistance, yield qtl confirmation, and genetic gain in soybean
… aphid resistance. Genetic Progress in Soybean Yield Between 1924 and 2010, US average soybean yields have increased at the rate of 21.3 kg ha-1 annually. This yield gain has occurred due to improvements in soybean genetics, the production environment, or increased atmospheric CO2 levels. The …