Revitalizing Chemurgy: Chemicals from Agricultural Resources

Author(s):  
Patrick B. Smith
1952 ◽  
Vol 21 (13) ◽  
pp. 136-136
Author(s):  
George B. Cressey

Soil Science ◽  
1955 ◽  
Vol 79 (3) ◽  
pp. 225
Author(s):  
WILLIAM VAN ROYEN

Water Policy ◽  
2018 ◽  
Vol 21 (1) ◽  
pp. 49-72 ◽  
Author(s):  
Jiazhong Zheng ◽  
Weiguang Wang ◽  
Dan Chen ◽  
Xinchun Cao ◽  
Wanqiu Xing ◽  
...  

Abstract A coordinated nexus of agricultural resources is vital to achieve food security and sustainable development in China. Comprehensively considering the water–energy–food nexus as well as the external environment, this study adopts a three-stage data envelopment analysis (DEA) modelling evaluation method to assess the agricultural production efficiency (APE) of seven provinces in the middle and lower reaches of the Yangtze River (MLYR) during 1996–2015. The results show that the three-stage DEA modelling evaluation method reveals real APE and is considered to be a better quantitative method than conventional approaches. A gradually widening range of APE is an important challenge for this region. Significantly, this region generates huge demands for agricultural resources. Moreover, regional emissions of greenhouse gases (GHG) decreased from 34.20 million tons standard coal in 1996 to 32.11 million tons standard coal in 2015, though APE has continued to decrease by 2.56% in the past two decades. In general, the management and technology levels should be improved simultaneously, even though specific opportunities for APE improvement vary across provinces in MLYR. However, understanding the temporal and spatial variation of APE along with the WEF nexus from a production-based insight is a vital step toward appropriately targeted policy making for nationwide resources savings and emissions reduction.


2014 ◽  
Vol 641-642 ◽  
pp. 179-182 ◽  
Author(s):  
Jin Liang Chen

Through grey estimation of the parameters of logistic equation, a grey logistic forecasting model is established. The effective irrigation area in Liaoning Province was simulated by the model. The simulation results had good agreement with the available data, with a correlation of 0.95. The effective irrigation area was predicted to be 1.583 million hectares in 2018, very close to the predicted upper limit of 1.588 million hectares. Thus, there is little potential for the development of the effective irrigation area, rendering the structural adjustment of agricultural resources very necessary.


1917 ◽  
Vol 11 (3) ◽  
pp. 421-447 ◽  
Author(s):  
Charles H. Cunningham

Like other neutral nations of Europe, Spain has been tremendously affected by the war. Though she has not been brought into such close contact with the great struggle as have Holland and the Scandinavian countries, because of her distance from the battlefields and the comparative insignificance of her commercial interests, she has nevertheless felt and is still feeling a great strain, the chief characteristics of which are economic. The cost of living in Spain has increased several fold. This is due in part to the difficulty in obtaining both manfactured articles and coal for her own industries and in part to the great scarcity of agricultural products: the result of the short-sighted policy followed up to the present of exporting food products which should have been retained at home. Though possessed of a greater arable area in proportion to her population than any other country in Europe except Russia, the methods of agricultural production in Spain are wofully deficient. As a result of her own backwardness and her failure to develop either her industrial or her agricultural resources, Spain is now suffering, to a lesser degree possibly, the same inconveniences which are disturbing Germany, France and England: namely, a scarcity of food; and she does not possess the artificial stimulus which those countries have to aid in overcoming it.


2016 ◽  
Vol 12 (3) ◽  
pp. 267 ◽  
Author(s):  
Riza Arian Noor ◽  
Muhammad Ruslan ◽  
Gusti Rusmayadi ◽  
Badaruddin Badaruddin

The irregularity of observation sites distribution and network density, lack data availability and discontinuity are the obstacles to analyzing and producing the information of agroclimate zone in South Kalimantan. TRMM satellite needs to be researched to overcome the limitations of surface observation data. This study intended to validate TRMM 3B43 satellite data with surface rainfall, to produce Oldeman agroclimate zone based on TRMM satellite data and to analyze the agroclimate zone for agricultural resources management. Data validation is done using the statistical method by analyzing the correlation value (r) and RMSE (Root Mean Square Error). The agroclimate zone is classified based on Oldeman climate classification type. The calculation results are mapped spatially using Arc GIS 10.2 software. The validation result of the TRMM satellite and surface rainfall data shows a high correlation value for the monthly average. The value of correlation coefficient is 0,97 and 25 mm for RMSE value. Oldeman agroclimate zone based on TRMM satellite data in south Kalimantan is divided into five climate zones, such as B1, B2, C1, C2, and D1.


2019 ◽  
Vol 2 ◽  
pp. 237
Author(s):  
Dmytro Arkhireyskyi

The purpose of the article is to establish and investigate the dependence of the population of Soviet Russia, which in 1918 − the first half of 1919 was suffering from the food crisis caused by the policy of the Bolsheviks, as well as the communist regime itself on Ukrainian food, also, to review the plans of the RSFSR leadership on Ukrainian agricultural resources in the context of the actual conquest of Russia by Ukraine in early 1919.Methods of research: chronological, structural-system, logical-historical.The main results. The reasons for the birth in Russia in 1918 of the traffic of bagmen and the peculiarities of the penetration of Russian private suppliers into the territory of Ukraine were researched; the reaction of the Ukrainian State to the appearance of Russian bagmen in the country was studied; the level of efficiency of trade relations of independent Ukraine and RSFSR is analyzed; the relationship between the food situation in Russia and the attempts of the Bolsheviks to overcome it by establishing control over Ukrainian bread in the first half of 1919 was established; it has been proved that the establishment of the Bolshevik authorities in Ukraine and the introduction of the policy of the War Communism here meant the use of force, non-economic methods of influencing Ukrainian peasants for the purpose of actually extracting food resources from them.Practical significance. The results of the article are recommended for use in synthetic works on the history of Ukraine and Russia during the revolution period of 1917−1921, as well as for the development of special courses on the history of Ukraine, Russia and Eastern Europe. These materials can also be used to promote historical knowledge.Originality. The article is completely original, performed on the basis of the generalization of the experience of a number of domestic and foreign researchers with the involvement of archival and narrative sources.Scientific novelty. For the first time in the national historiography, the data revealing the reasons and the peculiarities of the food crisis in Soviet Russia in 1918, and also the doom of a significant part of the Russians to self-help, were synthesized and investigated; the dependence of the starving population of Russia and its authorities on Ukrainian food was first shown; the ways of obtaining Ukrainian bread by Russian bagmen and the Bolshevik regime in the context of the events of the end of 1918 − the first half of 1919 were highlighted.Type of article: anlytical.


Sign in / Sign up

Export Citation Format

Share Document