Estimating Wheat Yield

15 10 2017

I recently looked at the growing wheat, in a variety of paddocks, with my brother.

Notice how the tip of the head on the left, has been hit by a severe frost and will only have grain in the lower part of the head, if there’s enough moisture to allow the grain to fill. The middle head is from a different variety, which has a shorter growing time and so the impact of the frost is not as noticeable. The head on the right is a third variety developed for dry conditions. Notice how the lower part of the head is filling wider than the other two.

I then asked how he estimated yield before harvesting.

Being old school he has some quick estimations. Take an average square foot (30cm by 30cm). Count the number of grains. Every 26 grains is 1 bushel. 3 bushels equates to 1 bag. 12 bags equates to 1 ton. The difference between a ton (1016 kg) and the current tonne (1000 kg) is 16 kilograms. This is insignificant in that the whole process is only an estimate anyhow, and yield varies across the paddock. The only precise measurement is what was harvested. This yield is per acre and there are 2.5 acres per hectare. Wow. What a calculation!

There are other methods here but they use a square metre which is more counting than a square foot. 


3 Tools to Help Manage Learning by Monica Burns

11 10 2017

These ideas are relevant to any teacher, irrespective of their teaching experience. Thank you Monica. 

Meaningful Mathematics Games by Michelle Russell

23 09 2017

Here are some great ideas to engage students whilst reinforcing the relevant content.

Ancient Indian mathematical document earliest known use of zero, carbon dating reveals by David Coady

16 09 2017

This article reveals that Ancient Indians were using a symbol for zero hundreds of years earlier than historians previously believed. 

How the Google Suite Can Enhance Open-Ended Mathematics Exploration by Katrina Schwartz

11 09 2017

This article details how to use Google Suite with many of Jo Boaler’s teaching strategies.

How Magic Maker Cubes Can Increase Collaboration by Kriscia Cabral 

1 09 2017

This activity could also be used to summarise the properties of a cube including the area of a face and the volume of the cube. This could be repeated for a rectangular prism etc.

Alternatively each face could have a different problem to be solved in pairs etc. Each student might take a turn to choose the problem to solve. Perhaps revision of the properties of the cube could be discussed as the cube is cut out and assembled. 

Ink blots, Dots Are Used to Teach Mathematics by Steve Wyborney

29 08 2017

See this article for numerous connected ideas in the teaching of Mathematics. Thank you Steve.