Greenhouse Management – Carbon Dioxide in Greenhouses

Chapter 7 Carbon Dioxide in Greenhouses (selected excerpts) In a greenhouse filled with plants, carbon dioxide concentration will closely follow ambient outside concentrations during the day as long as ventilation is needed. Carbon dioxide concentrations rise during the dark period because plants are not using carbon dioxide for photosynthesis and respiration. In the greenhouse, there 

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Elevated CO2 Reduces the Inhibitory Effect of Soil Nitrate on Nitrogen Fixation in Pea Plants

Introducing their work, Butterly et al. (2016) write that rising atmospheric CO2 concentrations are projected to increase the productivity of agricultural cropping systems in the future, primarily via enhanced photosynthesis and reduced evapotranspiration when water and nutrients are not limiting. One field crop that is economically important in many semi-arid locations is the common pea 

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Weather, Water, and Climate Priorities – A Policy Statement of the American Meteorological Society

(Adopted by the AMS Council 26 May 2016) Understanding how the Earth system works and transforming this knowledge into action will allow our nation and the global community to effectively respond and adapt to changing weather, water, and climate conditions.  National investment and leadership combined with enhanced partnerships across the public, private, academic, and nongovernmental 

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Study Finds “No significant global precipitation change from 1850 to present”

By Paul Homewood http://www.sciencedirect.com/science/article/pii/S0022169415008744 A paper recently published finds that there has been no significant global precipitation change from since 1850. ABSTRACT Precipitation measurements made at nearly 1000 stations located in 114 countries were studied. Each station had at least 100 years of observations resulting in a dataset comprising over 1½ million monthly precipitation amounts. 

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Greening of the Earth and its drivers

By Zaichun Zhu, Shilong Piao,Ranga B. Myneni, Mengtian Huang, Zhenzhong Zeng, Josep G. Canadell, Philippe Ciais, Stephen Sitch, Pierre Friedlingstein, Almut Arneth, Chunxiang Cao, Lei Cheng, Etsushi Kato, Charles Koven, Yue Li, Xu Lian, Yongwen Liu, Ronggao Liu, Jiafu Mao, Yaozhong Pan,Shushi Peng, Josep Peñuelas, Benjamin Poulter, Thomas A. M. Pugh, Benjamin D. Stocker et 

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Fundamentals of Ocean pH

By Roger Cohen and Will Happer, September 18, 2015 We are often told that CO2 released from burning fossil fuels will cause dangerous ocean acidification.  Actually the oceans will remain comfortably alkaline and hospitable to life for the foreseeable future. This brief note is a quantitative review of the physical chemistry of ocean pH.  High 

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