Summary
This seminal 1974 paper introduces the Zadoks decimal code, a standardised numerical classification system for cereal growth stages. The decimal code provides a universally applicable framework for recording and communicating phenological development in wheat, barley, oats and other cereals, enabling consistency in agronomic observations, pesticide application guidance, and research reporting across different growing conditions and regions.
Regional applicability
The Zadoks scale has become the international standard for cereal growth stage description and remains widely adopted in United Kingdom crop production, agronomy practice, and regulatory guidance for pesticide application timing. Its development predates modern digital agriculture but continues as the foundational reference for phenological classification in UK cereals.
Key measures
Decimal codes assigned to cereal growth stages from emergence to maturity
Outcomes reported
The paper presents a decimal coding system for describing and standardizing the growth and development stages of cereal crops, facilitating consistent communication and comparison across agronomic research and practice.
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