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  1. No Access

    Article

    Changes in soil phosphorus fractions in a calcareous paddy soil under intensive rice crop**

    We conducted a 4-year field experiment on a calcareous paddy soil in Zhejiang province of China to measure the changes in chemically extracted soil P fractions in an irrigated double-crop** rice system. Trea...

    Q. Zhang, G. H. Wang, Y. K. Feng, Q. Z. Sun, C. Witt, A. Dobermann in Plant and Soil (2006)

  2. No Access

    Article

    Processing of Yield Map Data

    Yield maps reflect systematic and random sources of yield variation as well as numerous errors caused by the harvest and map** procedures used. A general framework for processing of multi-year yield map data...

    J. L. **, A. Dobermann in Precision Agriculture (2005)

  3. No Access

    Article

    Plant nutrient management for enhanced productivity in intensive grain production systems of the United States and Asia

    Are present nutrient management recommendations for the world's major cereal crop** systems adequate to sustain the productivity gains required to meet food demand while also assuring acceptable standards of...

    A. Dobermann, K.G. Cassman in Plant and Soil (2002)

  4. No Access

    Chapter

    Plant nutrient management for enhanced productivity in intensive grain production systems of the United States and Asia

    Are present nutrient management recommendations for the world’s major cereal crop** systems adequate to sustain the productivity gains required to meet food demand while also assuring acceptable standards of...

    A. Dobermann, K. G. Cassman in Progress in Plant Nutrition: Plenary Lectu… (2002)

  5. No Access

    Article

    A new approach to increase the attainable rice yield in intensive irrigated rice systems of Zhejiang province, China

    A new site-specific nutrient management approach was developed to break the apparent attainable yield barrier of 6 t·ha−1 in the double rice crop** system of Zhejiang. On-farm experiments involving 21 rice-grow...

    Wang Guang-huo, A. Dobermann, C. Witt… in Journal of Zhejiang University-SCIENCE A (2001)

  6. No Access

    Chapter

    Challenges for sustaining productivity gains and environmental quality in intensive grain production systems of Asia and the United States

    Are present nutrient management recommendations for the world’ major cereal crop** systems adequate to sustain the productivity gains required to meet food demand while also assuring acceptable standards of ...

    A. Dobermann, K. G. Cassman in Plant Nutrition (2001)

  7. No Access

    Chapter

    Strategies for nutrient management in irrigated and rainfed lowland rice systems

    Attaining maximum economical yield is the priority of irrigated rice farmers. Current fertilizer management practices in intensive, irrigated rice systems are, however, not tailored to the large between-field ...

    A. Dobermann, P. F. White in Resource Management in Rice Systems: Nutrients (1999)

  8. No Access

    Article

    Strategies for nutrient management in irrigated and rainfed lowland rice systems

    In this paper we review key issues determining nutrient management strategies in irrigated and rainfed lowland riceland and we present two examples of site-specific nutrient management (SSNM) strategies. First...

    A. Dobermann, P.F. White in Nutrient Cycling in Agroecosystems (1998)

  9. No Access

    Chapter

    In situ measurement of soil nutrient supply in lowland rice fields

    We used ion-exchange resin capsules for measuring soil nutrient supply in a long-term experiment with rice in Tamil Nadu, India. Capsules were either placed in situ (ISI) or inserted into soil paste for anaero...

    A. Dobermann, R. Nagarajan, P. Stalin… in Plant Nutrition for Sustainable Food Produ… (1997)

  10. No Access

    Article

    Soil organic matter and the indigenous nitrogen supply of intensive irrigated rice systems in the tropics

    Soil organic matter (SOM) has been proposed as an index of N supply in paddy soils although field validations are few. We evaluated the relationship between the indigenous N supply (N i ...

    K. G. Cassman, A. Dobermann, P. C. Sta Cruz, G. C. Gines, M. I. Samson… in Plant and Soil (1996)

  11. No Access

    Article

    Fertilizer inputs, nutrient balance and soil nutrient supplying power in intensive, irrigated rice system. III. Phosphorus

    Data from long-term experiments at 11 sites in Asia with a wide range of nutrient input treatments and yield levels were used to quantify crop P requirements of rice (Oryza sativa L.) and the P balance in intensi...

    A. Dobermann, K. G. Cassman, P. C. Sta.Cruz… in Nutrient Cycling in Agroecosystems (1996)

  12. No Access

    Article

    Fertilizer inputs, nutrient balance, and soil nutrient-supplying power in intensive, irrigated rice systems. II: Effective soil K-supplying capacity

    Based on the analysis of soil K status in 11 long-term fertility experiments in Asia, two approaches for assessing the K-supplying power of lowland paddy soils were evaluated to predict total K uptake by irrig...

    A. Dobermann, K. G. Cassman, P. C. Sta. Cruz… in Nutrient Cycling in Agroecosystems (1996)

  13. No Access

    Article

    Fertilizer inputs, nutrient balance, and soil nutrient-supplying power in intensive, irrigated rice systems. I. Potassium uptake and K balance

    Research in many countries indicates a negative K balance in intensive, irrigated rice systems but comparative studies across different environments are few. Using a uniform sampling methodology, we measured K...

    A. Dobermann, P. C. Sta. Cruz, K. G. Cassman in Nutrient Cycling in Agroecosystems (1996)