Results 261 to 270 of about 2,200,665 (307)
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Geography of crop yield skewness
Agricultural Economics, 2015AbstractAnalysis of crop yield distributions provides insights into better understanding how natural resources shape agricultural productivity. This study seeks to provide a rigorous theoretical and empirical understanding of the effects of exogenous geographic and climatic factors on the first three moments of crop yields with focus on the third ...
Du, Xiaodong +3 more
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Land Economics, 2020
How does the historical legacy of agriculture affect democratic traditions in contemporary societies? This paper provides empirical evidence that inherent crop yield and democracy exhibit an inverted U-shaped relationship. This finding is supported by cross-country data from up to 147 countries, 186 pre-colonial societies, and the U.S. states.
James B. Ang +2 more
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How does the historical legacy of agriculture affect democratic traditions in contemporary societies? This paper provides empirical evidence that inherent crop yield and democracy exhibit an inverted U-shaped relationship. This finding is supported by cross-country data from up to 147 countries, 186 pre-colonial societies, and the U.S. states.
James B. Ang +2 more
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2018
Abstract This chapter focuses on the various processes that determine the growth and yield of tomatoes, with emphasis on the influence of environmental factors and crop management, such as light, carbon dioxide, temperature, humidity, salinity, plant density and leaf and fruit pruning.
Heuvelink, E., Li, T., Dorais, M.
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Abstract This chapter focuses on the various processes that determine the growth and yield of tomatoes, with emphasis on the influence of environmental factors and crop management, such as light, carbon dioxide, temperature, humidity, salinity, plant density and leaf and fruit pruning.
Heuvelink, E., Li, T., Dorais, M.
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2005
The processes that determine tomato crop growth and yield are considered in detail, with emphasis on the influence of environmental factors such as light, CO2, temperature, humidity and salinity. The main topics are as follows: Biomass production (leaf area and light interception, leaf and crop photosynthesis); Crop and fruit growth; Biomass ...
Heuvelink, E., Dorais, M.
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The processes that determine tomato crop growth and yield are considered in detail, with emphasis on the influence of environmental factors such as light, CO2, temperature, humidity and salinity. The main topics are as follows: Biomass production (leaf area and light interception, leaf and crop photosynthesis); Crop and fruit growth; Biomass ...
Heuvelink, E., Dorais, M.
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Annual Review of Phytopathology, 1989
Ozone (03) in the atmosphere plays a dual role in its effects on the earth's environment. In the stratosphere, it performs a critical task of absorbing some of the sun's ultraviolet radiation. Paradoxically, 03 in the troposphere is a component of photochemical air pollution and causes more damage to vegeta tion than all other pollutants combined.
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Ozone (03) in the atmosphere plays a dual role in its effects on the earth's environment. In the stratosphere, it performs a critical task of absorbing some of the sun's ultraviolet radiation. Paradoxically, 03 in the troposphere is a component of photochemical air pollution and causes more damage to vegeta tion than all other pollutants combined.
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2023
The fast pace of urban development minimize the agricultural lands. Owing to poor rainfall and drastic climatic changes farmers often face challenges to sustain cultivation of crops with respect to crop cycle. With growing economic competition and rising population, governmental agencies design long term plans which rarely address the farmer's needs ...
Singh, Dr. Bhaludra R Nadh +3 more
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The fast pace of urban development minimize the agricultural lands. Owing to poor rainfall and drastic climatic changes farmers often face challenges to sustain cultivation of crops with respect to crop cycle. With growing economic competition and rising population, governmental agencies design long term plans which rarely address the farmer's needs ...
Singh, Dr. Bhaludra R Nadh +3 more
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Maximizing crop yield in alley crops
Agroforestry Systems, 1998A simple graphical model is presented illustrating the balance between facilitation and competition necessary for maximizing crop yield in alley cropping systems. Three functions are composed into the decision function: (1) the percent increase in crop yield from facilitation resulting from prunings, (2) the amount of prunings resulting from different ...
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1942
Excerpts from the report: This publication represents the joint interest of the Weather Bureau, the Agricultural Marketing Service, and the Bureau of Agricultural Economics, in promoting extensive research in the relation between weather and crops and in methods of long-range forecasting of weather and crop fluctuations.
Bean, Louis H., Bean, Louis H.
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Excerpts from the report: This publication represents the joint interest of the Weather Bureau, the Agricultural Marketing Service, and the Bureau of Agricultural Economics, in promoting extensive research in the relation between weather and crops and in methods of long-range forecasting of weather and crop fluctuations.
Bean, Louis H., Bean, Louis H.
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1978
This paper shows how spectral analysis can be used to determine the cyclical nature of crop yields. The number and length of cycles are estimated for corn and wheat in the Corn Helt and the Northern Plains. Several cycles appear to be superimposed over the trend yield.
Liu, Karen +3 more
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This paper shows how spectral analysis can be used to determine the cyclical nature of crop yields. The number and length of cycles are estimated for corn and wheat in the Corn Helt and the Northern Plains. Several cycles appear to be superimposed over the trend yield.
Liu, Karen +3 more
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Madras Agricultural Journal, 1956
The main aim of all agricultural research workers is focussed on the problem of maximisation of crop production with minimum cost. Evolution of yielding strains, formulation of economical and profitable manurial programmes, utilisation of abour-saving implements, economic use of water for irrigation and tapping to the maximum extent all the avilable ...
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The main aim of all agricultural research workers is focussed on the problem of maximisation of crop production with minimum cost. Evolution of yielding strains, formulation of economical and profitable manurial programmes, utilisation of abour-saving implements, economic use of water for irrigation and tapping to the maximum extent all the avilable ...
openaire +1 more source