Agronomy and Crop Sciences Commons^™

Modeling Grain Yield And Straw Yield Of Wheat Using Back Propagation And Genetic Algorithm, Omar Maghawri Ibrahim Hassan Dr.

Dr. Omar Maghawri Ibrahim

The first objective of this study was to model the effect of yield components, number of grain/spike, number of spikes/m2, and 1000 kernels weight on the grain yield and straw yield of wheat. An artificial neural network (ANN), multilayer perceptron feed forward neural network (MLP) was used for developing the predictive model. Two different training algorithms: back propagation (BP) and genetic algorithm (GA) were used to train the MLP which structured of three neurons in the input layer, one hidden layer of six neurons, and two neurons in the output layer. The second objective of the current study was to …

The Biophysical Link Between Climate, Water, And Vegetation In Bioenergy Agro-Ecosystems, Andy Vanloocke, Justin E. Bagley, Sarah C. Davis, Mir Zaman Hussain, Jesse Miller, Stephen W. Nesbitt, Carl J. Bernacchi

Andy VanLoocke

Influence Of Nitrogen Fertilizer And Foliar Application Of Salicylic Acid On Wheat, Omar Maghawri Ibrahim Hassan Dr.

Dr. Omar Maghawri Ibrahim

Two cemented plots experiments were carried out during the winter seasons of 2012/2013 and 2013/2014, Soil Salinity Laboratory, Alexandria, Egypt, to study the effect of three levels of salicylic acid (SA) (0, 50, 100 ppm) and three rates of nitrogen fertilizer (75, 100, 125 kg N/feddan) on yield and yield components of wheat (Sakha 93). The experimental design was split plot with four replicates. The results indicated that increasing nitrogen fertilizer rates resulted in significant increase in plant height (cm), number of grain/spike, number of spikes/m2, 1000 grain weight (gm), grain yield (gm/plot), straw yield (gm/plot), and biological yield (gm/plot). …

The Historical Role Of Base Maps In Soil Geography, Bradley A. Miller, R. J. Schaetzl

Bradley A Miller

Soil mapping is a major goal of soil science. Soil maps rely upon accurate base maps, both for positional reference and to provide environmental data that can assist in the prediction of soil properties. This paper reviews the historical development of base maps used for soil mapping, and evaluates the dependence of soil mapping on base maps. The availability of geographic technology for producing base maps has both constrained and directed the geographic study of soil. The lack of accurate methods for determining location limited early geographic descriptions of soils to narratives, or to listings of attributes for property-based map …

Performance Assessment Of Some Flax (Linum Usitatissimum L.) Varieties Using Cluster Analysis Under Sandy Soil Conditions, Omar Maghawri Ibrahim Hassan Dr.

Dr. Omar Maghawri Ibrahim

To assess the performance and the variability of 49 flax varieties based on agronomic parameters using cluster analysis, a field experiment was conducted in 2011/2012 and 2012/2013 winter seasons at the farm of the National Research Center at Nubria district, Albehira Governorate, Egypt. The results revealed high significant difference among all flax varieties in all the studied characters. Letwania-9 and Evelen cultivars surpassed all other varieties in seed and oil yields/ fed. On the other hand, D variety gave the lowest value of seed yield/fed and F variety gave the lowest values of oil% and oil yield/fed. While, G Variety …

Intsormil, Mamourou Diourté, Elvis A. Heinrichs

Elvis A. Heinrichs

INTSORMIL est géré par l’Université de Nebraska-Lincoln qui joue le rôle de chef de file d’un accord de coopération liant l’USAID à des associés pour cinq ans. La vision globale d’INTSORMIL consiste à améliorer la sécurité alimentaire, accroître les revenus agricoles et améliorer l’activité économique dans les pays à grande production des sorgho/mil en Afrique et en Amérique centrale (carte ci-contre).

Crop Management Technologies Approved/Recommended To Farmers By Intsormil Supported Nars Programs 2006-2012, Elvis A. Heinrichs

Elvis A. Heinrichs

Table listing year, crop (sorghum or pearl millet), country, technology approved/ recommended for release to farmers (sowing rate, spacing, fertilizer, pesticide, herbicide, tied ridges etc.), and comments regarding crop management technologies approved/recommended to farmers by INTSORMIL-supported NARS programs, 2006-2012. Countries included are: Burkina Faso, Ethiopia, Ghana, Mali, Mozambique, Niger, Uganda, Zambia, El Salvador, and Nicaragua.

Semantic Calibration Of Digital Terrain Analysis Scale, Bradley A. Miller

Bradley A Miller

Digital terrain analysis (DTA) provides efficient, repeatable, and quantified metrics of landscape characteristics that are important to the Earth sciences, particularly for detailed soil mapping applications. However, DTA has not been field tested to the extent that traditional field metrics of topography have been. Human assessment of topography synthesizes multiple parameters at multiple scales to characterize a landscape, based on field experience. In order to capture the analysis scale used by field scientists, this study introduces a method for calibrating the analysis scale of DTA to field assessments. This method is used to calibrate land-surface derivatives of relative elevation, profile …

Effectiveness Of Hand Removal For Small-Scale Management Of Japanese Beetles (Coleoptera: Scarabaeidae), Paul V. Switzer, Ryan M. Cumming

Paul V. Switzer

Hand removal is often recommended as a method for small-scale control of Japanese beetles (Popillia japonica Newman). In this study, we investigated the effectiveness of daily hand removal for controlling damage by Japanese beetles on grape plants. We also investigated whether the timing of the removal (at 0800, 1400, or 1900 hours, or at all 3 periods) inßuenced the effectiveness of the technique. We found that hand removal signiÞcantly lowered the number of beetles on, and consequently the damage to, grape plants relative to nonremoval controls. Of the single removal treatments, removal of beetles at 1900 hours was most effective, …

Sweet Sorghum As A Bioenergy Crop: Literature Review, Teshome Regassa

Teshome H. Regassa

No abstract provided.

Registration Of ‘Mattern’ Waxy (Amylose-Free) Winter Wheat, P S. Baenziger, R A. Graybosch, D K. Santra, T Regassa, Y Jin, S Wegulo, G Bai, P S. Amand, X Chen, B Seabourn, F Dowell, R Bowden, D M. Marshall

Teshome H. Regassa

‘Mattern’ (Reg. No. CV-1092, PI 665947) hard winter waxy wheat (Triticum aestivum L.) was developed cooperatively by the USDA–ARS and the Nebraska Agricultural Experiment Station and released in 2012. Mattern has red grain color and waxy (amylose-free) endosperm starch. It was released primarily for its unique end-use quality attributes and for grain yield competitive with currently grown Nebraskaadapted cultivars. The waxy starch is conditioned by the presence of three naturally occurring mutations that eliminate production of the enzyme granule-bound starch synthase. Granule-bound starch synthase synthesizes amylose in typical wheats and other cereal crops. Mattern was tested experimentally as NX04Y2107 and …