The Influence of Maturity on Sorghum Grain Yields when Ratoon Cropping PDF Download
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Author: Ronny R. Duncan
Publisher:
ISBN:
Category : Crop yields
Languages : en
Pages : 24
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Author: Ronny R. Duncan
Publisher:
ISBN:
Category : Crop yields
Languages : en
Pages : 24
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Book Description
Author: Ronny R. Duncan
Publisher:
ISBN:
Category : Agriculture
Languages : en
Pages : 24
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Author: University of Georgia. College of Agriculture. Experiment Stations
Publisher:
ISBN:
Category : Double cropping
Languages : en
Pages : 56
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Book Description
Insects pests may limit the production of sorghum grain in ratoon cropping systems in the southeastern United States. Early planting dates required in ratoon cropping systems help avoid high and potentially damaging populations of most key pests before the first grain harvest. However, greenbugs (Schizaphis graminum (Rondani) and other aphids could cause economic damage to the first crop. Greater insect pest problems are likely to occur on the second (ratoon) crop than the first crop. Key pests which may reach damaging levels on the ratoon crop include the fall armyworm (Spodoptera frugiperda (J.E. Smith), corn earworm (Heliothis zea (Boddie)), sorghum webworm (Celama sorghiella (Riley)), and sorghum midge (Contarinia sorghicola (Coquilett)). Use of resitant hybrids, cultural practices, and natural suppressive agents is encouraged to help control populations of key pests whenever possible. Selective insecticide use should be based on careful evaluation of numbers of pest and beneficial insects, plant development, weather, and economic factors.
Author: Robert L. Haney
Publisher:
ISBN:
Category : Crop yields
Languages : en
Pages : 1
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Author: International Rice Research Institute
Publisher: Int. Rice Res. Inst.
ISBN: 9711041901
Category : Cropping systems
Languages : en
Pages : 287
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Book Description
Overview; Morphology and physiology of rice ratoons; Rice ratooning in practice; Evaluation and potential of rice ratooning; Cultural practices; Genetics and varietal improvement.
Author: Kalaiyarasi Pidaran
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Prior studies indicate clumped planting can increase grain sorghum yield up to 45% under water deficit conditions by reducing tiller number, increasing radiation use efficiency, and preserving soil water for grain fill. The objective of this study was to evaluate effects of planting geometry on sorghum grain yield. The field study was conducted in seven environments with two sorghum hybrids, four populations, and two planting geometries. Crop responses included leaf area index, yield, and components of yield. Delayed planting decreased yield by 39%, and a later maturing hybrid increased yield, relative to an early hybrid, by 11% under water sufficiency. Clumped planting increased the fraction of fertile culms (culms which formed panicles) from 5-14%. It reduced the number of culms m−2 by 12% under water limiting conditions (at one of two locations) but increased culms m−2 16% under water sufficiency. Seeds per panicle and seed weight generally compensated for differences in panicles m−2, which were related to different planting population densities. Although agronomic characteristics of hybrids varying in maturity have been widely studied, little information exists concerning their physiological differences. Therefore, the objective of the greenhouse study was to determine if stomatal resistance, leaf temperature, and leaf chlorophyll content differed between two DeKalb grain sorghum [Sorghum bicolor (L.) Moench] hybrids. They were DKS 36-16 and DKS 44-20, of medium-early and medium maturity, respectively, when grown under field conditions in Kansas. Seeds were planted in a greenhouse. Stomatal resistance and leaf temperature were measured 55 days after planting with a Decagon Devices (Pullman, WA) diffusion porometer, and chlorophyll content was measured 119 days after planting with a Konica Minolta (Osaka, Japan) SPAD chlorophyll meter. The two hybrids did not differ in stomatal resistance, leaf temperature, chlorophyll content, height, and dry weight. Their difference in maturity was not evident under the greenhouse conditions. Future work needs to show if hybrids of different maturities vary in physiological characteristics.
Author: Daniel Myron Baker
Publisher:
ISBN:
Category : Hybrid sorghum
Languages : en
Pages : 424
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Author: Abu Muhammad Shamsuddin
Publisher:
ISBN:
Category :
Languages : en
Pages : 212
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Author: Bandiougou Diawara
Publisher:
ISBN:
Category :
Languages : en
Pages :
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In Kansas, productivity of grain sorghum [Sorghum bicolor (L.) Moench] is affected by weather conditions at planting and during pollination. Planting date management and selection of hybrid maturity group can help to avoid severe environmental stresses during these sensitive stages. The hypothesis of the study was that late May planting improves grain sorghum yield, growth and development compared with late June planting. The objectives of this research were to investigate the influence of planting dates on growth, development, and yield of different grain sorghum hybrids, and to determine the optimal planting date and hybrid combination for maximum biomass and grains production. Three sorghum hybrids (early, medium, and late maturing) were planted in late May and late June without irrigation in Kansas at Manhattan/Ashland Bottom Research Station, and Hutchinson in 2010; and at Manhattan/North Farm and Hutchinson in 2011. Data on leaf area index, dry matter production, harvest index, yield and yield components were collected. Grain yield and yield components were influenced by planting date depending on environmental conditions. At Manhattan (2010), greater grain yield, number of heads per plant, harvest index, and leaf-area were obtained with late-June planting compared with late May planting, while at Hutchinson (2010) greater yield was obtained with late May planting for all hybrids. The yield component most affected at Hutchinson was the number of kernels panicle-1 and plant density. Late-May planting was favorable for late maturing hybrid (P84G62) in all locations. However, the yield of early maturing hybrid (DKS 28-05) and medium maturing hybrid (DKS 37-07) was less affected by delayed planting. The effects of planting dates on growth, development, and yield of grain sorghum hybrids were found to be variable among hybrid maturity groups and locations.
Author: Lloyd B. Sherrod
Publisher:
ISBN:
Category : Corn
Languages : en
Pages : 28
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