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Book Effects of a Short Period of Water Stress on Some Yield Components of Texas 610 Grain Sorghum During Various Developmental Stages

Download or read book Effects of a Short Period of Water Stress on Some Yield Components of Texas 610 Grain Sorghum During Various Developmental Stages written by Kok Choon Teoh and published by . This book was released on 1970 with total page 85 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book The Effect of Light and Water Stress on Yield and Yield Components of Grain Sorghum

Download or read book The Effect of Light and Water Stress on Yield and Yield Components of Grain Sorghum written by Jerry Mac Bennett and published by . This book was released on 1975 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Effects of Nitrogen Stress and Water Stress on Growth and Panicle Development of Grain Sorghum Cv Texas 610 SR

Download or read book Effects of Nitrogen Stress and Water Stress on Growth and Panicle Development of Grain Sorghum Cv Texas 610 SR written by Malathi Nirmala Dias and published by . This book was released on 1990 with total page 202 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Expansion of the Stress day Index for Irrigation Scheduling of Grain Sorghum

Download or read book Expansion of the Stress day Index for Irrigation Scheduling of Grain Sorghum written by Roger Branson Lewis and published by . This book was released on 1973 with total page 174 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Characterization of Grain Sorghum for Physiological and Yield Traits Associated with Drought Tolerance

Download or read book Characterization of Grain Sorghum for Physiological and Yield Traits Associated with Drought Tolerance written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Grain sorghum (Sorghum bicolor L. Moench) is the fourth most important cereal crop grown throughout the semi-arid regions of the world. It is a staple food crop in Africa and Asia, while it is an important feed crop in the United States (US). More recently it is increasingly becoming important as a potential bioenergy feedstock crop around the world. The state of Kansas is the largest producer of grain sorghum in the US and contributes 40% of the total production. Drought is one of the major environmental factors limiting sorghum production in the semi-arid regions of the US, Asia and Africa. It is estimated that global crop losses due to drought stress exceed $10 billion annually. In crop production, drought stress can be classified into pre- or post-flowering. Even though the world collections of sorghum contain over 35,000 accessions, the genetic base currently used in breeding programs is very small (about 3%). Thus, it is important to identify diverse breeding lines for crop improvement. The diversity (association) panel consisting of 300 sorghum lines from all over the world was assembled for trait evaluation and association mapping. In this research these lines were grouped into the five major races (Figure 1) and 10 intermediate races of sorghum. The objectives of the research are to: (i) quantify the performance of the diversity panel under field conditions in Kansas, (ii) identify critical physiological traits affected by drought at both pre- and post-flowering stages of sorghum development, (iii) identify the most sensitive stage to drought stress during the reproductive phase of sorghum development and, (iv) test the feasibility of using a chlorophyll fluorescence assay (CVA) as a tool for identifying stay-green lines in grain sorghum during early stages of crop development. Field experiments were conducted in 2006 and 2007 in two locations in Kansas (Manhattan and Hays) under rain fed and irrigated conditions for the association panel. Objectives (iii) and (iv) were achieved with controlled environment experiments conducted in the greenhouse at the agronomy department, Kansas State University in 2006 and 2007. Results showed that there was large genetic variability among and within different races in the diversity panel for growth, physiological traits and yield components. Some genotypes showed yield stability across the different environments that were investigated. Drought significantly decreased seed number and harvest index across genotypes and races. In grain sorghum the period prior to flowering (panicle initiation) was the most sensitive stage to drought stress, in terms of its effect on seed-set, during reproductive development. A cell viability assay showed that there were significant differences in the loss of cell viability between leaf sample of stay green and non-stay green genotypes when leaf samples are collected in the morning and subjected to high respiratory demand. Therefore the chlorophyll fluorescence assay has potential as a tool for stay green trait screening at early stages of growth in grain sorghum.

Book Effects of Water Stress and Night Temperature on Grain Yield of Sorghum Bicolor L Moench Under Field Conditions

Download or read book Effects of Water Stress and Night Temperature on Grain Yield of Sorghum Bicolor L Moench Under Field Conditions written by Josè Francísco Gòmez B. and published by . This book was released on 1982 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Crop Physiology Abstracts

Download or read book Crop Physiology Abstracts written by and published by . This book was released on 1989 with total page 968 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Analysis of the Effects of High Precipitation in Texas on Rainfed Sorghum Yields

Download or read book Analysis of the Effects of High Precipitation in Texas on Rainfed Sorghum Yields written by Om Prakash Sharma and published by . This book was released on 2019 with total page 134 pages. Available in PDF, EPUB and Kindle. Book excerpt: Most of the recent studies focus on the consequences of extreme weather on crop yields, especially on droughts and hot weather. However, knowledge of the consequences of excess precipitation on crop yield and subsequent consequences on the food production system is lacking. Therefore, we attempted to fill that knowledge gap. In this study, we collected historical crop yield data for Texas by county for grain sorghum and the historical daily precipitation data from weather stations within the county. The precipitation data (from the nearest station(s) to the cultivated area) and crop yield data were shortlisted (based on length of record and absence of missing values) and arranged for the period 1973-2003 covering a variety of crop growing seasons. Grain sorghum crop growing periods in different parts of Texas was estimated based on the east-west precipitation gradient, north-south temperature gradient, and typical planting and harvest dates in Texas. Using the daily time series of precipitation data, we estimated the growing season total precipitation and maximum 4-day total precipitation for each county growing rainfed grain sorghum. Using the two parameters mentioned above as independent variables, and crop yield of sorghum as the dependent variable, we tried to find out relationships between excess precipitation and decreases in crop yields using both graphical and mathematical relationships. Results were analyzed in four different levels 1. Storm by storm consequences on crop yield; 2. Growing season total precipitation and crop yield; 3. Maximum 4-day precipitation and crop yield; and 4. Multiple linear regression of independent variables (Growing season total precipitation and maximum 4-day precipitation and crop yield) and dependent variable (yield of rainfed grain sorghum) with and without a principal component analysis (to remove the relationship between confounding independent variables). Our graphical and mathematical results point out excess precipitation can decrease rainfed sorghum yields in Texas. Our results also suggest the rainfed sorghum yield reductions by excess precipitation can range from 18 to 38%.

Book Plant Breeding Abstracts

Download or read book Plant Breeding Abstracts written by and published by . This book was released on 1991 with total page 1878 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Selected Water Resources Abstracts

Download or read book Selected Water Resources Abstracts written by and published by . This book was released on 1991 with total page 898 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Book Effects of Plant Spacing on Yield Components of Sorghum in the U S A and Soybean in India

Download or read book Effects of Plant Spacing on Yield Components of Sorghum in the U S A and Soybean in India written by H. C. Minor and published by . This book was released on 1971 with total page 115 pages. Available in PDF, EPUB and Kindle. Book excerpt: A. Grain sorghum - 1966 and 1967. The effects of plant spacing on yield and yield components of RS610 hybrid grain sorghum were studied in 1966 and 1967 at Urbana, Illinois. Grain yield/plant was, as expected, reduced in all experiment as plant population was increased. Plants at low populations were able to compensate somewhat for low stand densities through production of tillers. More tillers were produced in narrow than in wide rows in one of the two experiments conducted in 1966. A generally higher/seed at low than at high plant population increased yield/plant at low population. In spite of tillering which increased the number of seeds/plant and production of heavier seeds by plants at low stand densities, yield/m2 increased as plant population increased to between 25-48 plants/m2, depending on the experiment. While RS610 hybrid grain sorghum has been noted for its high capacity to tiller, the results of these experiement indicate that it lacks the potential to produce a sufficient number of tillers/plant and/or seeds/panicle to offset low planting rates at Urbana, Illinois. Per plant yield from a study utilizing a systematic planting design, in which observations were single systematically arranged plants, were similar to those obtained in a large plot experiment. Small per plant difference were magnified, however, when they were multiplied by the number of plants/m2 so that predicted yield/m2 from the systematic study did not correspond closely to those obtained in the large plot experiment. (...).

Book Sorghum in the Eighties

Download or read book Sorghum in the Eighties written by and published by . This book was released on 1982 with total page 486 pages. Available in PDF, EPUB and Kindle. Book excerpt: