Opportunities for increased nitrogen-use efficiency from improved resource management in irrigated rice systems

Cassman, Kenneth G.; Peng, Shaobing; Olk, Daniel C.; Ladha, J. K.; Reichardt, Wolfgang; Dobermann, A.; Singh, Upendra

doi:10.1016/s0378-4290(97)00140-8

Cited by 492 publications

(232 citation statements)

References 135 publications

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“…Even in high fertilizer input with three or more split N applications, 50% or more of rice uptake-N is shown to be from indigenous source (Japanese Society of Soil Science and Plant Nutrition, 1986). Thus, increasing soil fertility is important for high-yielding rice cultures as mentioned by Cassman et al (1998). Many of the contest-winning crops that yielded more than 12 t ha -1 in 1950s and 1960s in Japan received 10-20 t ha -1 or more of compost every year, together with about 100 kg N ha -1 as fertilizer (Fuke, 1961).…”

Section: (C) Intermittent Irrigation and Delayed Fl Oodingmentioning

confidence: 99%

Can Yields of Lowland Rice Resume the Increases that They Showed in the 1980s?

Horie¹,

Shiraiwa²,

Homma³

et al. 2005

Plant Production Science

169

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Section: (C) Intermittent Irrigation and Delayed Fl Oodingmentioning

confidence: 99%

Can Yields of Lowland Rice Resume the Increases that They Showed in the 1980s?

Horie¹,

Shiraiwa²,

Homma³

et al. 2005

Plant Production Science

169

View full text Add to dashboard Cite

“…The degradation, which is reflected in declining yields in long-term agronomic experiments and decelerating aggregate yields at the national level, appears in many intensivecropping systems in different areas of the world and is attributable to a number of factors 12,13 . Scientists at the International Rice Research Institute (IRRI) hypothesize that rice yields fall over time owing to a decline in soil nitrogen in water-saturated soils, increased incidence of disease with high nitrogen use, and a build up of soil pests because of continuous monocropping 14 . In the highly productive Punjab region of India and Pakistan, the productivity of wheat-rice systems is declining because of falling concentrations of organic matter and phosphorus in the soil and increasing salinity in the groundwater 15,16 .…”

Section: Pressure On the Environment And Resource Basementioning

confidence: 99%

Enhancing the crops to feed the poor

Huang

Pray

Rozelle

2002

Nature

250

147

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Solutions to the problem of how the developing world will meet its future food needs are broader than producing more food, although the successes of the 'Green Revolution' demonstrate the importance of technology in generating the growth in food output in the past. Despite these successes, the world still faces continuing vulnerability to food shortages. Given the necessary funding, it seems likely that conventional crop breeding, as well as emerging technologies based on molecular biology, genetic engineering and natural resource management, will continue to improve productivity in the coming decades.

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“…With the objectives of sustaining or increasing farmers' profits and alleviating poverty, enhancing agricultural production is essential ). Thus, optimising application of fertiliser, in other words, optimised nutrient management (Cassman et al 1998;Pampolino et al 2007;Wang et al 2007), is required in order to achieve both environmental (reduce biodiversity loss) and economic (increase production) objectives.…”

Section: Assessing Pressures On Biodiversity At Field Level -Crop Manmentioning

confidence: 99%

Impacts of agricultural land-use changes on biodiversity in Taihu Lake Basin, China: a multi-scale cause–effect approach considering multiple land-use functions

Asai

Reidsma

Feng

2010

International Journal of Biodiversity Science, Ecosystem Servic

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This paper aims to assess the impacts of agricultural land-use changes on biodiversity in Taihu Lake Basin, China, and to identify possible conservation strategies. We used the mean species abundance (MSA) approach, building on simple causeeffect relationships between environmental drivers and biodiversity impacts at the global level. Our assessment estimated that 21% of the original species in the undisturbed ecosystem were present in 2000. We also analysed and reviewed agricultural pressures at different spatial scales to enable the development of conservation strategies at regional and farm levels. This analysis showed, first, that intensive crop management is reflected by the amount of fertilisers applied. Policies and technologies aiming to reduce environmental impacts have been ineffective. Second, the abundance of semi-natural elements was found to be low and the fragmentation high. To link agricultural pressures to the MSA approach, we propose a multi-scale cause-effect approach, which can be linked to other land uses. This approach is useful to provide a quick scan of biodiversity status and identify conservation strategies. Training farmers to use site-specific nutrient management should be stimulated. Furthermore, acknowledging multiple land-use functions will help to develop biodiversity conservation strategies that are acceptable to farmers and policymakers.

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Opportunities for increased nitrogen-use efficiency from improved resource management in irrigated rice systems

Cited by 492 publications

References 135 publications

Can Yields of Lowland Rice Resume the Increases that They Showed in the 1980s?

Can Yields of Lowland Rice Resume the Increases that They Showed in the 1980s?

Enhancing the crops to feed the poor

Impacts of agricultural land-use changes on biodiversity in Taihu Lake Basin, China: a multi-scale cause–effect approach considering multiple land-use functions

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