Wednesday, January 20, 2010

Week 4: Irrigation

No 'irrigation ratio' graph this week (I'll show weeks 4 and 5 next time). Instead I've been asked how I keep track of the exact volumes of water and the concentrations of salt and nutrients applied to the corn. Sorry it's very low tech - I mix it up in a drum and then gravity feed through the drip lines. The choice of washing powder brand is because i) it's mid range salinity but acceptable for plants ii) alkaline iii) contain phosphate - and I'm measuring salt, pH and phosphorus in the soil (but not showing all the detail here). The week's dose of potassium nitrate is shown in the test tube to the left of the washing powder.

1 comment:

willybill said...
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