Open questions in sustainable agriculture

Lockeretz, W.

doi:10.1017/s0889189300002460

Cited by 78 publications

(55 citation statements)

References 17 publications

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“…Sometimes the term sustainable agriculture is used synonymously with such terms as "organic farming," "alternative farming," "ecological farming," and "regenerative farming" (Lockeretz, 1988).…”

Section: Meaning Of Sustainable Agriculturementioning

confidence: 99%

Agricultural extension educators' perceptions regarding the teaching and learning processes as related to sustainable agriculture: implications for agricultural extension education

Jayaratne

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Section: Meaning Of Sustainable Agriculturementioning

confidence: 99%

Agricultural extension educators' perceptions regarding the teaching and learning processes as related to sustainable agriculture: implications for agricultural extension education

Jayaratne

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“…A non-negative trend in production of a system over time implies that the system is sustainable (Lal, 1998). According to Lockeretz (1988) 'sustainable agriculture' is a loosely defined term that encompasses a range of strategies for addressing many of the problems that afflict agriculture worldwide. These problems include loss of soil productivity from excessive erosion and associated plant nutrient losses, surface and groundwater pollution from pesticides fertilizers and sediment, impending shortages of nonrenewable resources and low farm income because of low market price and high production costs.…”

Section: Sustainability Of Agriculture -General Concepts and Scenariomentioning

confidence: 99%

Soil Quality and Productivity Improvement Under Rainfed Conditions – Indian Perspectives

Sharma¹,

Mandal²,

Venkateswarlu³

2012

Resource Management for Sustainable Agriculture

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“…That is to say, to sustain modern agriculture, we tend to de pend on the input of fossil fuel energy. This is a phenomenon going against the low-input practice, the essence of sustainable agriculture, which does not depend much on the input of industrial material (Lockeretz 1988: Gibbon et al 1995.…”

Section: Introductionmentioning

confidence: 99%

Changes in the Energy Efficiency of Regional Crop Production in Japan

Nihei

2001

Geogr. Rev. Jpn, Ser B

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Abstract:Examining agricultural efficiency in terms of energy balance will be a first step in helping to find a solution to the sustainable development of agriculture, and to environmental problems such as the exploitation of natural resources especially in developed countries. This study attempts to define regional energy efficiency based on the regional input-output energy ratio (output/input), which is calculated by the input fossil fuel energy and output food energy of all crops produced in a region. It also investigates the changes in regional energy efficiency of the prefectures in Japan from 1970 to 1990. By inspecting typical combinations of crops, the regional energy efficiency, which will be an index for examining the temporal and spatial changes of regional crop production, is divided into four categories: high (regional input-output energy ratio: more than 2.7 in 1970 and 1990), middle (1.8-2.6 in 1970,1.7-2.6 in 1990), low (0.7 1.7 in 1970, 0.7-1.6 in 1990) and very low (under 0.6 in 1970 and 1990). Applying these categories to the prefectural level, specific features were seen in the decrease of the prefectures with middle efficiency in the southern Kanto Region and the appearance of prefectures with very low efficiency in the southeastern part of Japan over two decades. It is considered that the decline of energy efficiency was caused mainly due to the increase in the percentage of greenhouse crops planted in the prefectures that are active in the production of paddy rice and horticultural crops. The emergence of the prefectures with very low efficiency in 1990 also implies that intensive crop production reinforces the impact on the natural environment by the usage of fossil fuel energy especially in the region that has high economic land productivity.

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Open questions in sustainable agriculture

Cited by 78 publications

References 17 publications

Agricultural extension educators' perceptions regarding the teaching and learning processes as related to sustainable agriculture: implications for agricultural extension education

Agricultural extension educators' perceptions regarding the teaching and learning processes as related to sustainable agriculture: implications for agricultural extension education

Soil Quality and Productivity Improvement Under Rainfed Conditions – Indian Perspectives

Changes in the Energy Efficiency of Regional Crop Production in Japan

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