Variety, Nitrogen and Kernel Size Flashcards
What is the requirement for any variety used for malting?
Must be an approved malting variety
What do approved varieties for malting need to have?
Required agronomic and malting properties
How can variation from crop to crop and field to field impact the malting process?
It can influence the malting and brewing process
What does ensuring robust specifications help minimize?
Effects of variation in grain
What environmental condition during ear filling leads to higher nitrogen levels in grains?
Very dry weather
What is the relationship between nitrogen level and extract level?
Inversely proportional
Fill in the blank: % protein = % nitrogen x _______.
6.25
Why is nitrogen (protein) important for beer?
It breaks down into free amino nitrogen (FAN) for yeast nutrition
What role does free amino nitrogen (FAN) play in beer production?
Important for yeast nutrition and effective fermentations
What effect does protein and its breakdown products have on beer?
Improves mouthfeel and fullness
What can excessive protein in beer lead to?
Hazes and filtration problems
What environmental factors affect kernel size?
Drought or excessive rain during ear filling
What is the ideal condition for kernel size during ear filling?
Optimum rainfall producing plump and even sized kernels
How is kernel size measured?
Using a sieve with 2.2 mm holes
What is the desired proportion of plump grains for the malting process?
More than 90%
Why is consistent grain size essential for milling?
The gap size is set based on grain size
What happens to oversized grains during milling?
They are over crushed
What may occur with undersized grains during milling?
They may not be crushed at all
