نتایج جستجو برای: wheat crop

تعداد نتایج: 117589  

Journal: :Journal of nematology 2000
S P Taylor G J Hollaway C H Hunt

Eighty-one cultivars from 12 field crop species were assessed for suitability as hosts to the root lesion nematode, Pratylenchus neglectus, in two field trials. Host status was assessed on the basis of either final P. neglectus densities in soil or multiplication rate under different crops. Both techniques gave consistent results for crop and cultivar ranking, and it was therefore concluded tha...

2002
Wallace Wilhelm L. N. Mielke C. R. Fenster W. W. Wilhelm

Tillage practices can influence crop root development. Root distributions were determined for wheat (Tdicum aestivum L.) grown in a wheat-fallow rotation during the 1977-1978 winter wheat crop year on an Alliance silt loam (Aridic Argiustoll). The fallow tillage treatments were plow, subtillage, and chemical (no tillage). Each tillage treatment was split into subplots for N application of 0 or ...

2011
Mikhail A. Semenov Peter R. Shewry

New crop cultivars will be required for a changing climate characterised by increased summer drought and heat stress in Europe. However, the uncertainty in climate predictions poses a challenge to crop scientists and breeders who have limited time and resources and must select the most appropriate traits for improvement. Modelling is a powerful tool to quantify future threats to crops and hence...

2009
Rojalin Tripathy A. K. Singh

Temperature and CO2 are two important parameters related to climate change, which affect crop yield. In this study, an attempt has been made to assess the impact of these two factors on the productivity of the four major cereal food crops (wheat, rice, maize and pearl millet) taking New Delhi as study area. This study also aims at identifying the most sensitive growth phase of these crops to th...

Journal: :Animal : an international journal of animal bioscience 2007
T W J Keady F O Lively D J Kilpatrick B W Moss

A randomised design involving 66 continental cross beef steers (initial live weight 523 kg) was undertaken to evaluate the effects of the inclusion of maize or whole-crop wheat silages in grass silage-based diets on animal performance, carcass composition, and meat quality of beef cattle. Grass silage was offered either as the sole forage or in addition to either maize or whole-crop wheat silag...

2002
Anwar A. Hamama Harbans L. Bhardwaj

INTRODUCTION Wheat farmers in Virginia and southeastern US could benefit greatly from the availability of a shortduration summer crop that could be produced during the period between wheat harvest in middle of June and before planting of the next wheat crop during October. Some wheat farmers plant soybean as a double crop system, but the productivity of double-cropped soybean is extremely low a...

2007
Upendra M. Sainju Andrew Lenssen Thecan Caesar-Thonthat Jed Waddell

Soil and crop management practices may alter the quantity, quality, and placement of plant residues that influence soil C and N fractions. We examined the effects of two tillage practices [conventional till (CT) and no-till (NT)] and five crop rotations [continuous spring wheat (Triticum aestivum L.) (CW), spring wheat–fallow (W–F), spring wheat–lentil (Lens culinaris Medic.) (W–L), spring whea...

2013
Mustafa Mirik R. James Ansley Jacob A. Price Fekede Workneh Charles M. Rush

Wheat streak mosaic (WSM), caused by Wheat streak mosaic virus is a viral disease that affects wheat (Triticum aestivum L.), other grains, and numerous grasses over large geographical areas around the world. To improve disease management and crop production, it is essential to have adequate methods for monitoring disease epidemics at various scales and multiple times. Remote sensing has become ...

1998
E. Pullins Robert L. Myers

land is used for crop production and can increase potential profit. There are ecological as well as economic advantages to increasing the amount of time the land is used for production. A winter grain crop, traditionally wheat, can act as a cover crop to prevent erosion. A warm-season double crop, often soybean, may yield smaller returns than a full-season crop but often averages a positive net...

2017
Bernhard Schauberger Sotirios Archontoulis Almut Arneth Juraj Balkovic Philippe Ciais Delphine Deryng Joshua Elliott Christian Folberth Nikolay Khabarov Christoph Müller Thomas A M Pugh Susanne Rolinski Sibyll Schaphoff Erwin Schmid Xuhui Wang Wolfram Schlenker Katja Frieler

High temperatures are detrimental to crop yields and could lead to global warming-driven reductions in agricultural productivity. To assess future threats, the majority of studies used process-based crop models, but their ability to represent effects of high temperature has been questioned. Here we show that an ensemble of nine crop models reproduces the observed average temperature responses o...

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