Download or read book The Effect of Plant Density Nitrogen and a Growth Regulator on Wheat Triticum Aestivum L Em Thell Development and Productivity written by David Lee Ferguson and published by . This book was released on 1984 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Agronomy News written by and published by . This book was released on 1989 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sept.-Oct. issue includes list of theses and dissertations for U.S. and Canadian graduate degrees granted in crop science, soil science, and agronomic science during the previous academic year.

Download or read book The Effect of Plant Growth Regulators on Morphological Characteristics Grain Yield and Yield Components of Winter Wheat triticum Aestivum L C v Norstar written by P. M. S. Bandara and published by . This book was released on 1987 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comprehensive Dissertation Index written by and published by . This book was released on 1989 with total page 800 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book American Doctoral Dissertations written by and published by . This book was released on 1983 with total page 540 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Plant Growth Regulators and Their Effect on Yield of Wheat Triticum Aestivum L in Southern Australia written by Jaron Tomys Bennett and published by . This book was released on 2011 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Plant growth regulators (PGRs) shorten the straw of cereals and have been used commercially to control lodging in regions of high rainfall for many years. PGRs have been shown not only to reduce height, but affect yield formation processes such as dry matter accumulation, distribution and the principle yield components in the absence of lodging. The use of the anti-gibberellin PGRs such as Trinexapac Ethyl (Moddus) and Chlormequat Chloride (Cycocel) have only recently been considered as a means of increasing yield in dryland wheat production systems. However, results have been inconsistent and seem to vary with the type of PGR, rate, growth stage of application, environment and cultivar. The experiments reported here were designed to investigate the potential of PGRs to increase yields in dryland wheat production systems of the southern Australian wheat belt. Moddus and Cycocel (collectively to be referred to as PGRs) were applied in the field, at two locations, Wagga Wagga in the NSW Riverina using the variety EGA Gregory and Swan Hill in the Victorian Northern Mallee using the variety Yitpi. Crops were sprayed with varying rates and combinations of Moddus and/or Cycocel applied at three different crop growth stages, GS 13/15, GS 25/29 and GS 31/31. Measurements of crop height, canopy greenness, lodging, stem non-structured carbohydrates (NSC), dry matter production and yield and its principle components were taken to evaluate the effects of the PGRs."--Abstract.

Download or read book Agrindex written by and published by . This book was released on 1994 with total page 948 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Indian Science Abstracts written by and published by . This book was released on 1998-03 with total page 814 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Nitrogen and Plant Growth Regulator Effects on Triticale X Triticosecale Wittmack and Wheat Triticum Aestivum written by Allan Casey Thornton and published by . This book was released on 1993 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Bibliography of Agriculture written by and published by . This book was released on 1976 with total page 1732 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effects of Growth Retardant and Nitrogen Level on Growth Development and Yield of Yamhill Wheat written by Laurent Nounamo and published by . This book was released on 1985 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt: Increases in wheat production due to breeding may be reaching a plateau. The application of N-fertilizer beyond optimum levels leads to lodging and to an increase in tiller death. The use of plant growth regulators (retardants) may be an answer for future increases in production. Experiments were conducted in 1983 and 1984 to apply growth retardant paclobutrazol to reduce lodging under heavy rates of nitrogen, to determine if such an approach could reduce tiller mortality, partition more dry matter to the seed, and increase yield and yield components of the semi-dwarf winter wheat variety Yamhill. The application of paclobutrazol significantly reduced lodging promoted by nitrogen fertilizer. The reduction in lodging did not affect yield in part because lodging occurred late at the hard dough stage of development. The application of paclobutrazol at floral initiation actually increased tiller death by promoting the formation of late tillers that died before reaching maturity. Investigation of applying paclobutrazol at earlier stages of development of wheat is suggested. Paclobutrazol application reduced the total dry matter production by decreasing dry matter accumulation in the stem. Dry matter lost from stems was not apparently relocated in the ear. Ear dry weight remained the same following the application of paclobutrazol. Nitrogen application in these tests seemed to reduce the capacity of the ear to accept carbohydrate by decreasing the number of florets per spikelet. It also decreased seed weight in 1983 and grain yield in 1983 and 1984. An increase in L.A.I. (leaf area index) may have increased mutual shading with negative effects on tiller development. Paclobutrazol application decreased grain yield and harvest index by decreasing seed weight and by reducing the number of grains per ear in 1984. The decrease in seed weight was attributed to competition from non-surviving tillers and to the reduction in L.A.D. (leaf area duration) due to stripe rust incidence. Further work is needed to evaluate possible paclobutrazol x N interaction on a variety of wheat susceptible to lodging. Different locations and more effective control of diseases would be required for such studies. Application of paclobutrazol at different stages of growth should be investigated. Also, an investigation of paclobutrazol interference with nitrogen uptake and utilization is suggested.

Download or read book Effect of Growth Regulators on Winter Survival Lodging and Yield of Norstar Winter Wheat written by P. M. S. Bandara and published by . This book was released on 1987* with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Index to American Doctoral Dissertations written by and published by . This book was released on 1974 with total page 640 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Effect of Plant Growth Regulators on the Growth and Development of Rht and Uniculm Lines of Spring Wheat Triticum Aestivum L written by Judith Harrison and published by . This book was released on 1993 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Effect of Nitrogen and Water Stresses During Tillering and Grain Filling in Wheat written by Muhammad Ashraf and published by . This book was released on 1992 with total page 306 pages. Available in PDF, EPUB and Kindle. Book excerpt: The CERES-Wheat Crop Growth and Development model treats temperature, nitrogen and water stresses as limiting factors. For each day the model calculates a stress index for temperature, N and water, compares the magnitude of the indices, and then adjusts the calculated daily potential growth using the index of the most severe stress, while ignoring the other stresses. Under the conditions in Oregon, however, mild N and water stress will often be present together in about equal degree of stress. Some published results suggest that both stresses affect growth and yield under those conditions. Therefore, this work was undertaken to evaluate the combined effects of N and water stress on growth and development of wheat (Triticum aestivum L.). To make such an evaluation one must be able to control both N and water supplies to the plant and the response of the plant to these two variables must be measured at different growth stages. A system of imposing controlled plant water stress developed by Snow and Tingey (1985) was adapted and evaluated for its potential to impose controlled levels of both N and water stress to single wheat plants. Using a 12 mmol N and 4 cm pathlength as optimum N and water supply treatment, 2 mmol N and 12 cm pathlength and a 1 bar standard ceramic disc in the floral foam column as N and water stress treatments during tillering resulted in 15 % reduction in tillers/plant for limits to the N supply alone, a 39 % reduction for limits to the water supply alone, and a 52 % reduction when both stresses were imposed simultaneously. There was no effect of N or water supply treatments on the leaf appearance rate on the main stem, a measure of the rate of progress toward flowering. Both N and water supplies had a strong effect on tillers/plant which, in turn, affected plant biomass and its constituent parts. The effects were independent, suggesting that, to accurately model the wheat canopy development when both mild N and water stresses are present, both stresses must be considered. A 'law of minimum' concept as currently used in the CERES-Wheat model would not be an accurate model for the process of tillering. In an experiment where stress was imposed during flowering and grain-filling, the grain yield/plant varied significantly with both N and water supplies. The interaction between N and water treatments on grain yield was also significant and was due primarily to their significant interaction on mean kernel weight. The major determinant of grain yield was tillers/plant at harvest. Both N and water supplies affected kernels/ear and N stress caused a reduction of 12% in both fertile spikelets/ear and kernels/fertile spikelet. At an optimum water supply, the difference between the effect of optimum and medium N supply on grain yield was not significant but yield in low N supply was reduced by 54%. In the medium water supply, the grain yield at both medium and low N treatments were significantly lower than at optimum N supply. There was no significant difference in yield between N supply treatments in the low water supply treatments. Thus, under severe water stress, a 'law of minimum' concept appeared to be valid, but under less severe stress both N and water supply affected grain yield. The data on leaf water potential and leaf temperature showed that plants in low water supply treatments maintained consistently lower leaf water potential and higher leaf temperature than in optimum water supply treatment.

Download or read book Bibliography of Agriculture written by and published by . This book was released on 1990 with total page 1842 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Biological Activity of a Tertiary Amine Plant Growth Regulator BMVE in Arabidopsis Thaliana and Wheat Triticum Aestivum written by Jaspinder Singh and published by . This book was released on 2018 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plant growth regulators are synthetic compounds that influence plant growth and development and can increase growth, yield, and nutritive value of food crops. Research in the past has shown that a class of plant growth regulators known collectively as substituted tertiary amines have the potential to increase crop productivity, photosynthetic efficiency, and overall plant vigor. However, earlier efficacy studies that involved spraying plants were sometimes inconsistent or showed only minimal benefits. A new delivery method involving seed application of tertiary amines before sowing has shown promise in field trials for multiple crop species (US patent 9464283) (Yokoyama, Chan, Oyama, & Hov, 2015). The goal of this study is to determine how the seed treatment with 2-(N-methylbenzylaminoethyl)-3-methylbutanoate (BMVE) affects plant growth and productivity. To link the effect of BMVE with plant phenotype, precise temporal changes in wheat growth were measured by using high-throughput phenotyping in a controlled environment. During these experiments, it was also determined whether BMVE is beneficial under drought conditions. A classical phenotyping approach was also followed to evaluate the effect of BMVE on early growth stages of wheat. Additionally, transcriptome analysis was done to identify differential gene expression in response to BMVE in Arabidopsis. An Arabidopsis mutant conferring reduced sensitivity to BMVE was characterized and used to map the resistant locus. These experiments were aimed at deciphering the mode of action and regulatory pathway of BMVE, which have been unclear so far.