نتایج جستجو برای: crops yields

تعداد نتایج: 133455  

Journal: :Sustainability 2023

Organic inputs constitute an alternative way to replace or reduce the use of agrochemicals in order increase sustainability and negative impacts agriculture on environment. A consistent determination average yields obtained with organic fertilizers comparison synthetic is necessary assess their potential both commercial agriculture. To achieve this goal, a meta-analysis existing scientific data...

2013
Rajib Deb Basavraj Sajjanar Karuna Devi K M Reddy Rajendra Prasad Sushil Kumar Arjava Sharma

Genetically modified (GM) crops with higher yields and better quality are currently being used in the feeds of livestock and fishes. Despite the advantages, there are concerns about GM-feeds including their effect on animal health, performance and safety of the consumers of animal products like milk, meat, egg and fish. Studies are conducted to assess the feeding efficiency of GM-crops in lives...

2005
Peter McCullagh

The aim of this paper to study the nature of spatial correlation of yields of agricultural crops. The focus is primarily on natural or non-anthropogenic spatial variation, patterns that cannot be explained by topography, by variety or treatment effects, or by agricultural practices. Conformal invariance implies stationarity and isotropy, and also determines the rate of decay of spatial correlat...

2006
DAVID CLIFFORD

The aim of this paper is to study the nature of spatial correlation of yields of agricultural crops. The focus is primarily on natural or non-anthropogenic spatial variation, patterns that cannot be explained by topography, by variety or treatment effects, or by agricultural practices. Conformal invariance implies stationarity and isotropy, and also determines the rate of decay of spatial corre...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2012
Louis J Gross Brian Beckage

S table and secure food production is essential to civilization. Any methods that improve our understanding of crop yields have the potential to reduce human suffering and help provide the caloric needs of an expanding world population. Similar hopes apply to commodity crops such as cotton and those used to meet energy needs. Given the vast amount of agricultural research and experience, it mig...

2011
Richard G. Dudley

Maize is widely grown in Africa including in drier areas where alternate crops will often perform better. Although maize will fail in drought years, it produces substantially higher yields than alternates, such as sorghum and millet, in wet years. Although people tend to select which crops to grow based on recent experience with crop harvests and prices, there is a widespread preference for mai...

Journal: :Plant physiology 2004
Wallace E Huffman

As the demand for food and fiber grew during the past 300 years, because of the Earth’s expanding human population and rising per capita incomes, society met this demand first by increasing the land area under cultivation and later by improving crops so that their yields were higher. Before 1900, land was abundant almost everywhere, and in the United States, new lands were brought into producti...

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