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  • SSNM approach
  • SSNM in three steps
  • Initial concept of SSNM
  • Current version of the SSNM approach
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  • Principles of N management
  • Background on making an N Recommendation
  • Using the SSNM approach to formulate locally adapted N recommendation
  • Using the Leaf Color Chart (LCC) for fertilizer N management
  • FAQs on N Management
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  • Principles of P and K management
  • Background on making P and K recommendations
  • Using SSNM approach to formulate P recommendations
  • Using SSNM approach to formulate K recommendations
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  • Bangladesh
  • China
  • India
  • Indonesia
  • Myanmar
  • Philippines
  • Vietnam
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  • Introduction to SSNM version 1.1
  • N management
  • P&K management
  • Implementing SSNM recommendations
  • Making an SSNM recommendation for rice
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  • SSNM: an approach for optimizing nutrient use in intensive rice production
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  • Nutrient omission plot
  • Potassium addition plot
  • Zinc addition plot

Southwestern Bangladesh

		Team Leaders   Dr. M. Murshedul Alam Agronomist email: malam@irribd.org Mr. Md. Akhter Hossain Khan Agronomist email: brrihq@bdonline.com
Site Characteristics     SSNM activities were conducted in Kushtia, Meherpur, Chuadanga, and Jhenaidah districts in southwestern Bangladesh. These districts belong to Agro-Ecological Zone 11, known as High Ganges River floodplain. Soil types predominantly include calcareous, well-drained dark gray and brown floodplain soils. The annual rainfall in this area is 1200–1400 mm.  Double rice and rice–wheat are two annual cropping systems commonly practiced in southwestern Bangladesh. The rice-growing seasons are

• Aman: This is the wet season (June/July to November/December) in which rice is usually transplanted and grown under partially irrigated conditions

• Boro: This is the dry season (December/January to April/May) in which rice is usually transplanted and grown under full irrigated conditions.

Wheat is grown during the dry season.

Development and Evaluation of SSNM

In 2000-02, on-farm experiments involving the use of the leaf color chart (LCC) for managing fertilizer N applications were conducted in farmers’ fields in 16 villages within a radius of 100 km in Kushtia, Meherpur, Chuadanga, and Jhenaidah Districts.

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