Food and Agriculture Organization of the United Nations
Managing your crop
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How to use this booklet
Five tenets for managers - the sections of the book
Steps you can take to identify and solve crop problems
Section 1: Reflecting on your farming system
What is your target yield?
Characteristics of a 5t/ha crop as it grows
Section 2: Describing the growth of your crop as stages. During which stages is yield determined?
The Zadoks decimal growth stages
The internal stages that drive development
External & internal stages and when yield is formed
Pictures to help identify all the Zadoks (Z) growth stages
Section 3: Assessing and measuring your crop
Why bother with measurement?
Using your senses to assess problems in your crop
First level of assessment: your eyeball check list
Where, how and what to sample in the field? A numerical assessment
Field sheets. A guide to recording your observations
Section 4: Check lists for problem identification
Check list for planting to the two-leaf stage (Z0.0 to Z1.2)
Check list for three-leaf stage to spike emergence (Z1.3 to Z5.0)
Check list for to early kernel growth (Z5.0 to Z7.02)
Check list for to harvest ripeness (Z6.8 to Z9.2)
Section 5: Problem description and solutions
Acid or alkaline soils
Poor crop stands. Why?
Planting depth and method
Optimum sowing time
Optimum seed rate
The crop canopy: control of tillers and spikes
The crop canopy: green leaves after heading
Irrigation timing and moisture stress
Section 6: Explanations of plant development
What advances wheat through its developmental stages?
Thermal time and heat sums
Base and optimum temperature
Photoperiod & vernalization also change rate of development
Section 7: Notes on two tillage systems
Minimum and zero tillage
Raised beds for irrigated wheat
Section 8: Terms used in the booklet
References used in the booklet