On-farm evaluation of leaf color chart for need-based nitrogen management in irrigated transplanted rice in northwestern India

Abstract

Nitrogen use efficiency (NUE) in rice is low due to the inefficient management of fertilizer N by farmers. We evaluated a leaf color chart (LCC) as a simple tool for improving the time and rate of N fertilizer use in farmers’ fields for 4 years (2000–2003) in irrigated rice in northwestern India. Application of N fertilizer whenever leaf greenness was less… (More)
DOI: 10.1007/s10705-006-9082-2

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