Agro-Ecosystems最新文献

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Ecological land-use planning and carrying capacity evaluation in the Jalapa region (Veracruz, Mexico) 墨西哥韦拉克鲁斯州Jalapa地区生态土地利用规划与承载力评价
Agro-Ecosystems Pub Date : 1982-07-01 DOI: 10.1016/0304-3746(82)90001-4
Gerald G. Marten , Luis A. Sancholuz
{"title":"Ecological land-use planning and carrying capacity evaluation in the Jalapa region (Veracruz, Mexico)","authors":"Gerald G. Marten ,&nbsp;Luis A. Sancholuz","doi":"10.1016/0304-3746(82)90001-4","DOIUrl":"10.1016/0304-3746(82)90001-4","url":null,"abstract":"<div><p>A practical approach for the inclusion of environmental factors in land-use planning is presented. The Jalapa region, an area of 4750 km<sup>2</sup> which embraces a diversity of ecological conditions, is used to illustrate the approach. Data were gathered from aerial photographs, a survey of maize fields and interviews of farmers concerning their cultivation practices.</p><p>After devising a climatic and geomorphological system of land classification, 33 land types were identified, described and inventoried; 58 land-use systems were identified and described. The descriptions were structured to predict the income, employment, costs, food production, agricultural chemical inputs and erosion that could be expected for each land-use system on each land type. This information was used to devise a multi-objective land-use game for planners. Users of the game may set priorities on their planning objectives, specify the amounts of agricultural services available, and see the effects these have on optimal allocation of the available land of each type among the different possible uses, as well as how well the objectives are satisfied by the allocation.</p><p>By shifting objective priorities and varying infrastructure levels, the game user may examine the trade-offs among planning goals and among possible avenues of investment or other management interventions. A study of the environmental cost of producing increasing amounts of food for a growing population in the Jalapa region illustrates the game's usefulness, and actual land allocations in the Jalapa region are compared with optimal allocations under different priorities. The carrying capacity of the region is examined from this point of view, giving particular attention to the demands that increasingly urban habits of consumption may place on the land and to the role properly directed technology can play in increasing carrying capacity without causing environmental damage.</p></div>","PeriodicalId":100066,"journal":{"name":"Agro-Ecosystems","volume":"8 2","pages":"Pages 83-124"},"PeriodicalIF":0.0,"publicationDate":"1982-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0304-3746(82)90001-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81193357","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 19
The effects of fly ash deposition on photosynthetic pigments and dry matter production of wheat and gram 粉煤灰沉降对小麦和大麦光合色素及干物质产量的影响
Agro-Ecosystems Pub Date : 1982-07-01 DOI: 10.1016/0304-3746(82)90003-8
P.S. Dubey , K. Pawar, S.K. Shringi, L. Trivedi
{"title":"The effects of fly ash deposition on photosynthetic pigments and dry matter production of wheat and gram","authors":"P.S. Dubey ,&nbsp;K. Pawar,&nbsp;S.K. Shringi,&nbsp;L. Trivedi","doi":"10.1016/0304-3746(82)90003-8","DOIUrl":"10.1016/0304-3746(82)90003-8","url":null,"abstract":"<div><p>Plants of two important crops of India, wheat (cultivar N-4) and gram (cultivar H-355) were dusted with 2, 4 and 6 g m<sup>−2</sup> day<sup>−1</sup> of fly ash for 45 days. Both crops showed an increase in the height of the plants, dry weight, and chlorophyll and carotenoid content. The higher dusting rates affected the photosynthetic pigment contents.</p></div>","PeriodicalId":100066,"journal":{"name":"Agro-Ecosystems","volume":"8 2","pages":"Pages 137-140"},"PeriodicalIF":0.0,"publicationDate":"1982-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0304-3746(82)90003-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81303230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 11
Biological efficiency in agriculture 农业生物效率
Agro-Ecosystems Pub Date : 1982-07-01 DOI: 10.1016/0304-3746(82)90008-7
G. Stanhill
{"title":"Biological efficiency in agriculture","authors":"G. Stanhill","doi":"10.1016/0304-3746(82)90008-7","DOIUrl":"10.1016/0304-3746(82)90008-7","url":null,"abstract":"","PeriodicalId":100066,"journal":{"name":"Agro-Ecosystems","volume":"8 2","pages":"Pages 150-152"},"PeriodicalIF":0.0,"publicationDate":"1982-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0304-3746(82)90008-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90726730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Some perspectives of the major biogeochemical cycles, scope 17 主要生物地球化学循环的一些观点,第17页
Agro-Ecosystems Pub Date : 1982-07-01 DOI: 10.1016/0304-3746(82)90005-1
M.J. Frissel
{"title":"Some perspectives of the major biogeochemical cycles, scope 17","authors":"M.J. Frissel","doi":"10.1016/0304-3746(82)90005-1","DOIUrl":"10.1016/0304-3746(82)90005-1","url":null,"abstract":"","PeriodicalId":100066,"journal":{"name":"Agro-Ecosystems","volume":"8 2","pages":"Pages 142-144"},"PeriodicalIF":0.0,"publicationDate":"1982-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0304-3746(82)90005-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73849116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 16
SAGO: The equatorial swamp as a natural resource 赤道沼泽是一种自然资源
Agro-Ecosystems Pub Date : 1982-07-01 DOI: 10.1016/0304-3746(82)90004-X
D.G. Coursey
{"title":"SAGO: The equatorial swamp as a natural resource","authors":"D.G. Coursey","doi":"10.1016/0304-3746(82)90004-X","DOIUrl":"https://doi.org/10.1016/0304-3746(82)90004-X","url":null,"abstract":"","PeriodicalId":100066,"journal":{"name":"Agro-Ecosystems","volume":"8 2","pages":"Pages 141-142"},"PeriodicalIF":0.0,"publicationDate":"1982-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0304-3746(82)90004-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136603961","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Farming practice in British prehistory 英国史前时期的农业实践
Agro-Ecosystems Pub Date : 1982-07-01 DOI: 10.1016/0304-3746(82)90006-3
G. Stanhill
{"title":"Farming practice in British prehistory","authors":"G. Stanhill","doi":"10.1016/0304-3746(82)90006-3","DOIUrl":"10.1016/0304-3746(82)90006-3","url":null,"abstract":"","PeriodicalId":100066,"journal":{"name":"Agro-Ecosystems","volume":"8 2","pages":"Pages 145-148"},"PeriodicalIF":0.0,"publicationDate":"1982-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0304-3746(82)90006-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"104070970","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Experimental reduction of rodent damage to vegetable crops in Indian villages 在印度村庄试验减少啮齿动物对蔬菜作物的损害
Agro-Ecosystems Pub Date : 1982-05-01 DOI: 10.1016/0304-3746(82)90013-0
Ranjan Advani, R.P. Mathur
{"title":"Experimental reduction of rodent damage to vegetable crops in Indian villages","authors":"Ranjan Advani,&nbsp;R.P. Mathur","doi":"10.1016/0304-3746(82)90013-0","DOIUrl":"10.1016/0304-3746(82)90013-0","url":null,"abstract":"<div><p>The relationship between rodent control, decline in damage and resultant increase in production in twelve vegetable crops was studied in fields (2000 ha) in eight villages near Jodhpur. The rodent damage to various vegetable crops ranged from 4.1–19.9%, the average being 8.7%. A reduction of 92.5% of the rodent population corresponded with a 91.9% reduction in damage. On average, this increased the production of vegetable crops to 11.7 quintals (q) ha<sup>−1</sup> (7% ha<sup>−1</sup>). The cost benefit ratio was 1:900. The paper also discusses the migration of rodents to crop fields from surrounding non-agricultural land and vice versa and replacement of rodent species after control operations.</p></div>","PeriodicalId":100066,"journal":{"name":"Agro-Ecosystems","volume":"8 1","pages":"Pages 39-45"},"PeriodicalIF":0.0,"publicationDate":"1982-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0304-3746(82)90013-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86791029","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 22
Decline of soil fertility due to intensification of land use by shifting agriculturists in Belize, Central America 在中美洲伯利兹,由于迁移的农民对土地的集约化使用,土壤肥力下降
Agro-Ecosystems Pub Date : 1982-05-01 DOI: 10.1016/0304-3746(82)90012-9
T. Arnason , J.D.H. Lambert , J. Gale , J. Cal , H. Vernon
{"title":"Decline of soil fertility due to intensification of land use by shifting agriculturists in Belize, Central America","authors":"T. Arnason ,&nbsp;J.D.H. Lambert ,&nbsp;J. Gale ,&nbsp;J. Cal ,&nbsp;H. Vernon","doi":"10.1016/0304-3746(82)90012-9","DOIUrl":"10.1016/0304-3746(82)90012-9","url":null,"abstract":"<div><p>Intensification of land use by shifting Maya agriculturists in Belize, Central America, has led to a decline in soil fertility and crop yields. Examination of eleven nutrients in crop plants and soil, and changes in nutrient levels with the length of the cropping period, indicated that phosphorus was the limiting factor for plant growth. Physical analyses of the soil and visual evidence suggested that erosion is a contributing factor to declining soil quality. A variety of solutions to the infertility problem are discussed.</p></div>","PeriodicalId":100066,"journal":{"name":"Agro-Ecosystems","volume":"8 1","pages":"Pages 27-37"},"PeriodicalIF":0.0,"publicationDate":"1982-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0304-3746(82)90012-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80244886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 38
Influence of the termite Macrotermes michaelseni (Sjöst) on soil fertility and vegetation in a semi-arid savannah ecosystem 大白蚁(Sjöst)对半干旱草原生态系统土壤肥力和植被的影响
Agro-Ecosystems Pub Date : 1982-05-01 DOI: 10.1016/0304-3746(82)90014-2
M.A. Arshad
{"title":"Influence of the termite Macrotermes michaelseni (Sjöst) on soil fertility and vegetation in a semi-arid savannah ecosystem","authors":"M.A. Arshad","doi":"10.1016/0304-3746(82)90014-2","DOIUrl":"10.1016/0304-3746(82)90014-2","url":null,"abstract":"<div><p>The growth and species structure of vegetation in relation to the proximity of termite (<em>M. michaelseni</em>) mounds was studied in a semi-arid savannah ecosystem during 1978–1980. The dry matter yield in the termite-modified area at 1–10 m distance from mounds was significantly greater (<em>P</em> &lt; 0.01) than that in the area beyond 22 m which is relatively unaffected by the termites. <em>Themeda triandra</em> and <em>Digitaria scalarum</em>, dominant grass species of the area, were totally absent in the 1–10 m zone around the mound. The major species in the immediate vicinity of the mound were <em>Pennisetum stramineum</em> and <em>Cynodon dactylon</em>, the latter was a dominant species (over 90%) within the 0–10 m zone and entirely absent beyond 15 m from the mound. The number of grass species increased from 2–3 species around the mound to 6–7 species in the area apparently beyond the influence of the mound. High concentration of nutrients and favourable water availability, together with good drainage, appeared to be the major causes of increased biomass and different species composition of vegetation around the mound.</p></div>","PeriodicalId":100066,"journal":{"name":"Agro-Ecosystems","volume":"8 1","pages":"Pages 47-58"},"PeriodicalIF":0.0,"publicationDate":"1982-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0304-3746(82)90014-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82773645","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 82
Biophysical ecology 生物物理生态学
Agro-Ecosystems Pub Date : 1982-05-01 DOI: 10.1016/0304-3746(82)90018-X
Roy Turkington
{"title":"Biophysical ecology","authors":"Roy Turkington","doi":"10.1016/0304-3746(82)90018-X","DOIUrl":"10.1016/0304-3746(82)90018-X","url":null,"abstract":"","PeriodicalId":100066,"journal":{"name":"Agro-Ecosystems","volume":"8 1","pages":"Pages 72-74"},"PeriodicalIF":0.0,"publicationDate":"1982-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0304-3746(82)90018-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79758987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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