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Author : Ladda Pakinnaka
Publisher :
ISBN 13 :
Total Pages : 298 pages
Book Rating : 4.:/5 (31 download)
Download or read book Leaf Analysis as an Indicator of the Nitrogen Status of Sorghum written by Ladda Pakinnaka and published by . This book was released on 1972 with total page 298 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Gilles Lemaire
Publisher : Springer Science & Business Media
ISBN 13 : 3642606849
Total Pages : 240 pages
Book Rating : 4.6/5 (426 download)
Download or read book Diagnosis of the Nitrogen Status in Crops written by Gilles Lemaire and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: Providing a link between theoretical and applied aspects of plant nutrition and agriculture, this book introduces new concepts in plant nutrition. It shows how these can be applied in order to assess the nitrogen status in crops and to improve nitrogen nutrition through optimized N fertilization management. In this way economic benefits can be obtained, while at the same time preventing detrimental effects on the environment. The main agricultural crops - grasses, wheat, barley, Durum wheat, maize, sorghum, grain legumes and potatoes - are covered. The book will be an invaluable source for agronomists.
Author : H. R. Lafitte
Publisher :
ISBN 13 :
Total Pages : 324 pages
Book Rating : 4.:/5 (2 download)
Download or read book Physiological Investigations of Nitrogen Use Efficiency in Grain Sorghum (Sorghum Bicolor (L.) Moench) written by H. R. Lafitte and published by . This book was released on 1982 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Fatima Awada
Publisher :
ISBN 13 :
Total Pages : 0 pages
Book Rating : 4.:/5 (962 download)
Download or read book Assesment of Sorghum Response to Nitrogen Availability written by Fatima Awada and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seven accessions of Sorghum bicolor were grown with low (N−) and optimal (N+) nitrate supply. Growth parameters (plant height and leaf numbers), physiological parameters (nitrate, protein, total N and total C contents) and the activity of glutamine synthetase (GS) were studied in leaves and roots of sorghum plants at three time points of early vegetative growth (2, 4 and, 6 weeks post emergence). Plant height and leaf number were higher with nitrate supply. Except for carbon, all studied parameters were sensitive to N availability and values were typically lower when nitrate supply was low. However, different genotypes displayed considerable variation in their response to N regimes. Variation among genotypes during early vegetative development was observed for plant height, but not for leaf number. Likewise, physiological parameters varied among accessions. A significant and strong correlation, N- and accession-dependent, was detected between plant height and nitrate content. Moreover, nitrate content and GS activity at early growth stages appeared to be good markers to discriminate between nitrate uptake and assimilation capacities of different accessions under both N conditions. In some sorghum accessions, protein and total N content were indicative of high nitrate reduction and assimilation even under N limitation. Chlorophyll content was also sensitive to N availability. Furthermore, expression studies of SbNRT1.1gene copies in leaves and roots of two accessions reflected variability in expression dependent on nitrogen condition, plant organ, plant age, and gene of interest. This study is helpful to characterize different aspects of the N metabolism in sorghum and may aid in the identification of sorghum genotypes with enhanced nitrogen use efficiency, a trait that is of key interest in one of the most important crop plants in arid and semi-arid regions.
Author : C. D. Carcallas
Publisher :
ISBN 13 :
Total Pages : 270 pages
Book Rating : 4.:/5 (79 download)
Download or read book Effects of Different Light Intensities, Nitrogen Levels and Population Densities on Grain Sorghum written by C. D. Carcallas and published by . This book was released on 1975 with total page 270 pages. Available in PDF, EPUB and Kindle. Book excerpt: Grain sorghum (Cosor 3) was grown under three light regimes, i.e., in full sunlight, 25% shade, and 50% shade at three levels each of nitrogen and plant population density to evaluate its yield and other, important characteristicssuch as: leaf lenght, leaf width, leaf area index,100-grain weight, grains per panicle, panicle yield, grain-stover ratio, threshing percentage, total dry matter production, panicle lenght, plant height and number of days to blooming. In addition, leaf nitratereductase activity and grain tannin concentration were analyzed. Plantpopulation densities used were 150, 000, 200, 000 and 250,000 plt/ha; the nitrogen levels at 0, 75, and 150 Kg N/ha; and 0, 25, 50 per cent shading. The statistical design split-split plot was used with plant population density as the main plot, nitrogen level as the sub plot, and light intensity as the sub-sub plot. The experiment was conducted during the dry season (January-April, 1975) at the Central Experiment Station, University of the Philippines at Los Banos, Laguna. The yielding capacity of grain sorghum (Cosor 3) in terms of its total dry matter,grain yield, and grain tannin concentration was reduced at low light intensyti. The results have shown that: l. Grain sorghum (Cosor 3) yielded differently at different combinations of plants density, nitrogenlevels, and light intensity. 2. Increasing plant population density up to 250,000 plt/ha consistently resulted in reduction of such characters as: leaf length, leaf width, plant height, and number of grains perpanicle. In spite of the depressive effects of dense population on individual plants, grain yield is co compensated by the increase in number of panicles per unit area. Higher plant population density is advantageous only at high light intensity, while at lower light intensity lower plant population is preferred. 3. Fertilized plants matured 10 days earlier than the unfertilized. Plants treated with 150 Kg N/ha produced higher grain yield at higher light intensity. Under shaded condition, grain yields from 75 and 150 Kg N/ha were comparable. 4. Grain tannin concentration was lower at high nitrogen rates. At high light intensity, grain tannin concentration was also high. 5. Leaf nitrate reductase activity was maximum at 25% shade and ao lower nitrogen level. At higher nitrogen rates, maximum nitrate reductase activity was obtained from the unshaded plants.
Author : R. S. Rauschkolb
Publisher :
ISBN 13 :
Total Pages : 5 pages
Book Rating : 4.:/5 (631 download)
Download or read book Field-evaluation of Nitrogen Nutritional Status for Corn and Sorghum written by R. S. Rauschkolb and published by . This book was released on 1975 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : P. R. Goldsworthy
Publisher :
ISBN 13 :
Total Pages : 4 pages
Book Rating : 4.:/5 (668 download)
Download or read book Leaf Sampling for the Determination of the Phosphorus Status of Sorghum written by P. R. Goldsworthy and published by . This book was released on 1966 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Pramod Pokhrel
Publisher :
ISBN 13 :
Total Pages : 142 pages
Book Rating : 4.:/5 (956 download)
Download or read book Effect of Planting Geometries and Fertilizer Placement on Nutrient Uptake by Grain Sorghum written by Pramod Pokhrel and published by . This book was released on 2016 with total page 142 pages. Available in PDF, EPUB and Kindle. Book excerpt: Grain sorghum [Sorghum bicolor (L.) Moench] is an important dryland crop in the Texas Panhandle. Productivity of grain sorghum depends on climatic conditions, plant available soil water, and soil fertility. Previous research has shown growing grain sorghum in clumps instead of Equal Spaced Planting (ESP) reduced plant stress, reduced production of tillers, and increased harvest index and grain yield under dryland conditions. The current study was conducted in the greenhouse and field to investigate the effect of fertilizer application on sorghum plants grown in clump and ESP geometries. The objectives of the research were to (a) compare fertilizer (nitrogen and phosphorus) uptake in grain sorghum plants in clumps and ESP geometries (b) observe root growth patterns in clump and ESP plants (c) and determine the fertilizer effect on tiller formation and harvest index. The greenhouse experiment was conducted at West Texas A&M University during 2014 and 2015. Grain sorghum was grown in clump and ESP geometries with two and three fertilizer levels in 2014 and 2015, respectively. Plants were grown in wooden boxes, with a transparent side, covered by a removable wooden board, so that root growth could be observed. All experiments were conducted in a Randomized complete block design (RCBD) and fertilizer was applied in a band beneath clump and ESP plants. The field experiment was conducted at the USDA Conservation and Production Research Laboratory at Bushland, Texas, during 2014 and 2015. Grain sorghum was grown in clump and ESP planting geometries in unfertilized and fertilized (68 kg N ha-1 and 10 kg P ha-1) plots. Planting density in both geometries was 62,000 plants ha-1. In 2015 corn was grown in clump and ESP planting geometries without using fertilizer. N and P concentrations in grain and stover were obtained from laboratory analysis and data are reported as N uptake in aboveground biomass and P uptake in aboveground biomass In the 2014 greenhouse study, ESP plants had significantly higher N uptake in aboveground biomass, stover yield, and tillers per plant. However, harvest index was higher in clumps. The interaction between planting geometry and fertilizer showed a significantly higher N uptake in ESP with high fertilizer level. In 2015, clump plants had significantly higher grain yield, aboveground N uptake, nitrogen use efficiency (NUE) and phosphorus use efficiency (PUE). Increasing fertilizer level increased P uptake in aboveground biomass. Plants in ESP produced deeper and well developed root systems while clump plants produced roots that developed angularly and then downward. In the 2014 field study, clump plants had lower N and P uptake in aboveground biomass than ESP, but had higher NUE and PUE. Though clump plants had significantly fewer tillers per plant than ESPs, harvest index was not different. In the 2015 field study, planting geometry did not have a significant effect on N and P uptake in aboveground biomass, NUE or PUE. However, the interaction between planting geometry and fertilizer level showed higher N uptake in clump fertilized plants. Clump plants produced fewer tillers per plant. Harvest index was significantly higher in clumps. Fertilized plots had significantly higher N uptake in aboveground biomass but fertilizer had no effect on P uptake. Overall, data suggest N and P uptake in aboveground biomass varies by soil nutrient condition, and level of fertilizer. Increasing fertilizer level increases tiller production in the plants. Application of fertilizer has shown mixed results on N uptake and grain yield in clump and ESP plants. Further investigation is necessary to draw a conclusion on aboveground N and P uptake in plants grown in clump and ESP planting geometries at different fertilizer rates and placement methods.
Author : Oswaldo E. Andrade-Bracho
Publisher :
ISBN 13 :
Total Pages : 152 pages
Book Rating : 4.:/5 (926 download)
Download or read book Effect of Nitrogen, Phosphorus, Potassium, and Plant Population on the Yield of Grain Sorghum (Sorghum Bicolor (L) Moench) written by Oswaldo E. Andrade-Bracho and published by . This book was released on 1982 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : James Lester Bourg
Publisher :
ISBN 13 :
Total Pages : 198 pages
Book Rating : 4.:/5 (23 download)
Download or read book Leaf Composition and Soil Properties for Evaluating the Response of Grain Sorghum to Fertilizer Nitrogen and Phosphorus written by James Lester Bourg and published by . This book was released on 1961 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : P. R. Goldsworthy
Publisher :
ISBN 13 :
Total Pages : 5 pages
Book Rating : 4.:/5 (974 download)
Download or read book Leaf Sampling for the Determination of the Phosphorous Status of Sorghum written by P. R. Goldsworthy and published by . This book was released on 1966 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Mackenzie Zwiener
Publisher :
ISBN 13 :
Total Pages : 75 pages
Book Rating : 4.:/5 (126 download)
Download or read book Phenotypic Plasticity of Diverse Sorghum Varieties in Response to Nitrogen Deficit Stress written by Mackenzie Zwiener and published by . This book was released on 2021 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitrogen is a key component in the growth of crops and can strongly influence phenotypic variation. The movement of nutrients from old vegetative tissue to young leaves and reproductive organs is known as senescence. Senescence can be influenced by the environment of a plant, such as, drought, heat, and nutrient stress. These environmental stressors can also influence canopy architecture. Crop canopy consists of several traits including: leaf number, angle, length and width. Past research in crops like maize and rice have shown significant influences of more erect leaves, including, the ability for increased planting density, which optimizes light interception and increases yield. In a field trial of a sorghum association panel including 345 different sorghum varieties grown in a replicated design under nitrogen sufficient and nitrogen deficit conditions, we have found that sorghum leaf angle is plastic in response to nitrogen deficit stress. While the response of individual varieties varied, an overall statistically significant trend was observed towards smaller leaf angles (e.g. more erect leaves) under deficient nitrogen conditions. In parallel with field experiments, greenhouse experiments utilizing sorghum plants grown under different levels of nitrogen availability were also conducted. These confirmed the increased erectness of sorghum leaves under nitrogen deficient conditions. In addition, RGB and hyperspectral images collected from this experiment were used to train machine learning models to classify individual pixels into six classes: nonplant pixels, panicles, stems, green leaves, senescing leaves, and dead leaves. With this new method, we were able to track the progression of senescence through the life cycle of individual sorghum plants grown under different nitrogen treatments.
Author : Sylvester Addy
Publisher :
ISBN 13 :
Total Pages : 138 pages
Book Rating : 4.:/5 (182 download)
Download or read book Agronomic Assessments of Genotypic Variation Among Stay-green and Senescent Sorghum Hybrids Under Different Rates of Nitrogen written by Sylvester Addy and published by . This book was released on 2007 with total page 138 pages. Available in PDF, EPUB and Kindle. Book excerpt: Investigates the difference in the nitrogen (N) status between stay-green and senescent sorghum hybrids by assessing the genotypic variability for chlorophyll content and leaf senescence under three rates of N supply to determine the minimum supply required for the expression of the stay-green phenotype in the stay-green hybrid. Compares nitrogen use, uptake, and utilization efficiencies and examines grain yield and differences in dry matter and plant nitrogen content in plant parts at harvest.
Author : Mohd. Fauzi Ramlan
Publisher :
ISBN 13 :
Total Pages : 6 pages
Book Rating : 4.:/5 (969 download)
Download or read book The effect of nitrogen of leaf longevity in sorghum infected by striga hermonthica written by Mohd. Fauzi Ramlan and published by . This book was released on 1994 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Bryan Jacob Unruh
Publisher :
ISBN 13 :
Total Pages : pages
Book Rating : 4.:/5 (823 download)
Download or read book Influence of Nitrogen on Weed Growth and Competition with Grain Sorghum written by Bryan Jacob Unruh and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Nitrogen (N) fertilizer intended for the crop may benefit highly competitive weeds to the detriment of the crop. A field experiment was conducted in 2009 to determine the influence of increasing N fertilizer rates and increasing Palmer amaranth densities on weed biomass and grain sorghum biomass and yield. Three rates were 0, 67, and 134 kg N ha−1 and natural populations of Palmer amaranth were thinned to densities of 0, 0.5, 1, 2, 4, and 8 plants m−1 of row. Palmer amaranth biomass increased as weed density and N rates increased. Weed-free grain sorghum yields were similar across all three N rates, and parameter estimates of yield across Palmer amaranth densities were not different between N rates. Based on the parameter estimates from the rectangular hyperbola model, initial slope (I) as density approached zero was 16%. Maximum expected yield loss (A) at high Palmer amaranth densities was 68%. Palmer amaranth showed a high response to N and the higher N rate increased the ability of the weed to reduce grain sorghum yield. A greenhouse experiment was conducted to determine the influence of six N rates on growth of six selected plant species, including grain sorghum, soybean, yellow foxtail, velvetleaf, Palmer amaranth and shattercane. Covariance analysis was performed with N rate as a covariate. Biomass of all species increased as N rate increased in both runs of the study. Soybean responded the least to N rate of all species in regards to biomass, height and leaf area production. In the first run, the biomass of three grass species (grain sorghum, yellow foxtail, shattercane) had similar estimates of slope and intercept of biomass across N rates. In the second run, the biomass slopes of grain sorghum and shattercane differed from soybean and were the only slopes that differed between species. Palmer amaranth had the highest rate of response as N increased but slopes of height were similar for Palmer amaranth, grain sorghum and shattercane. Soybean leaf area slopes were different from grain sorghum, yellow foxtail, and velvetleaf, but all other slopes were not different among species. Addition of N to grain sorghum increased weed growth and resulted in more yield loss as a result of weed density. The greenhouse study demonstrated that grain sorghum and Palmer amaranth increased in response similarly to the addition of N. Alternative N fertilizer management could play a role in minimizing Palmer amaranth impacts in grain sorghum production.
Author :
Publisher :
ISBN 13 :
Total Pages : 312 pages
Book Rating : 4.1/5 (812 download)
Download or read book Soil Testing and Plant Analysis written by and published by . This book was released on 1967 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Andy Clark
Publisher : DIANE Publishing
ISBN 13 : 1437903797
Total Pages : 248 pages
Book Rating : 4.4/5 (379 download)
Download or read book Managing Cover Crops Profitably (3rd Ed. ) written by Andy Clark and published by DIANE Publishing. This book was released on 2008-07 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: Cover crops slow erosion, improve soil, smother weeds, enhance nutrient and moisture availability, help control many pests and bring a host of other benefits to your farm. At the same time, they can reduce costs, increase profits and even create new sources of income. You¿ll reap dividends on your cover crop investments for years, since their benefits accumulate over the long term. This book will help you find which ones are right for you. Captures farmer and other research results from the past ten years. The authors verified the info. from the 2nd ed., added new results and updated farmer profiles and research data, and added 2 chap. Includes maps and charts, detailed narratives about individual cover crop species, and chap. about aspects of cover cropping.
