نتایج جستجو برای: crop growing periods

تعداد نتایج: 371803  

Journal: :The Journal of heredity 2005
Katarina Borojevic Ksenija Borojevic

Wheat is the main crop and often a strategic crop in many European countries. From a historical perspective, we describe the transfer of "reduced height genes" (Rht genes) from Japanese wheat varieties to wheat varieties in Europe and their influence on the increase of the total wheat production in the last century. Historic pathways of Rht genes were influenced directly or indirectly by wheat ...

2016
Qi Jing Jiali Shang Budong Qian Gerrit Hoogenboom Ted Huffman Jiangui Liu Bao-Luo Ma Xiaoyuan Geng Xianfeng Jiao John Kovacs Dan Walters

1 Canola was developed in Canada in the 1970s as an edible cultivar of rapeseed (Brassica napus L.) with low glucosinolates and low erucic acid. Currently, canola is grown on eight million ha of agricultural land in Canada, which is 22% of the global canola area. More than half of the harvested canola seeds in Canada are exported, accounting for 46% of the international canola market (FAOSTAT, ...

2006
Brian D. Wardlow Stephen L. Egbert Jude H. Kastens

The global environmental change research community requires improved and up-to-date land use/land cover (LULC) datasets at regional to global scales to support a variety of science and policy applications. Considerable strides have been made to improve large-area LULC datasets, but little emphasis has been placed on thematically detailed crop mapping, despite the considerable influence of manag...

Journal: :Remote Sensing 2018
Zhiqiang Cheng Jihua Meng Yanyou Qiao Yiming Wang Wenquan Dong Yanxin Han

The approach of using multispectral remote sensing (RS) to estimate soil available nutrients (SANs) has been recently developed and shows promising results. This method overcomes the limitations of commonly used methods by building a statistical model that connects RS-based crop growth and nutrient content. However, the stability and accuracy of this model require improvement. In this article, ...

Journal: :حفاظت گیاهان 0
مجید برزوئی ابراهیم ایزدی دربندی محمد حسن راشد محصل مهدی راستگو محمد حسن زاده خیاط

this study was conducted to investigate the effect of organic and bio-fertilizers on trifluralin durability.herbicide persistence is an important consideration in crop production since residue levels of trifluralin herbicides can persist to the next growing season and may injure sensitive crops in the rotation. residues of trifluralin persist in the soil for long periods. extremely small amount...

2002
D. N. Flaten S. C. Sheppard

Phosphorus (P) fertilization is a major input in crop production on the Great Plains, as many soils lack sufficient P for effective crop production. To optimize crop nutrition, P must be available to the crop in adequate amounts early in the growing season. Phosphorus is needed from the earliest stages of crop growth, because it is important in nearly all energy-requiring processes in the plant...

A. Patanothai, P. Jaisil P. Klomsa-ard

Multi-environment trials (METs) of crop genotypes are costly and require efficient test sites for cost effectiveness. This study aimed to identify efficient test sites for METs of sugarcane (Saccharum spp.) genotypes in Thailand, utilizing data from 10 sugarcane genotypes conducted at nine locations covering different sugarcane growing regions of the country for two crop-classes. Cluster an...

2015
Prajal Pradhan Günther Fischer Harrij van Velthuizen Dominik E. Reusser Juergen P. Kropp Jose Luis Gonzalez-Andujar

Global food production needs to be increased by 60-110% between 2005 and 2050 to meet growing food and feed demand. Intensification and/or expansion of agriculture are the two main options available to meet the growing crop demands. Land conversion to expand cultivated land increases GHG emissions and impacts biodiversity and ecosystem services. Closing yield gaps to attain potential yields may...

2017
Atif Kamran Muhammad Asif Syed Bilal Hussain Mukhtar Ahmad Arvind Hirani

Wheat is one of the major cereal crops with annual global production over 600 MT from about 200 M hectares (FAO 2012). The cultivation of wheat started about 10,000 years ago as part of the Neolithic revolution which state a transition from hunting and gathering of food to settle agriculture. Earlier cultivated forms of wheat were diploid (einkorn) and tetraploid (emmer) with known initial orig...

2011
N. Schütze M. de Paly U. Shamir

The scarcity of water compared with the abundance of land constitutes the main drawback within agricultural production. Besides the improvement of irrigation techniques a task of primary importance is solving the problem of intra-seasonal irrigation scheduling under limited seasonal water supply. An efficient scheduling algorithm has to take into account the crops’ response to water stress at d...

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