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Adjusting forage growth for current year's conditions

Mon, 06/16/2008 - 11:51 — m-kothmann

This past weekend I was visiting with a relative in Central Texas and he was lamenting the reduced hay production this year. I took the cumulative precipitation for the first 5 months of 2007 & 2008 and divided it into the bales of hay produced each year with the result of 12.5 bales per inch in 2007 and 11.5 bales per inch in 2008. The difference was 17.6" in 2007 (220 bales) and 7.8" in 2008 (90 bales). Since rainfall is a good predictor of forage production, you might use your rainfall records with a rolling 2-month current precipitation divided by the long-term 2-month average precipitation as a starter for adjusting current forage growth up or down from the normal curve. Other factors can also influence forage growth, but this would be a good place to start deciding how much to increase or decrease growth rate.

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Thu, 02/11/2010 - 07:19 — yuri.debura

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Mon, 06/23/2008 - 08:35 — austin

Precipitation measurements

Where did you get the precipitation data for that? I never know the best place to get that information, aside from my own records (which are poor).

While we're on the subject, what do you recommend for measuring local precipitation? What kind of gage? How long can you store rain in a gage before it evaporates much? Can you accumulate rain in a gage and measure once a month?

What about measuring evaporation? I'm sure that precipitation divided by pan evaporation (P/E) would more accurately correlate with forage production, but I don't think anyone records that information locally, and it's probably too much work to do it on my own using the conventional method. Do you know of a simple way to measure it?

Great post, by the way.

Austin

Fri, 04/23/2010 - 06:15 — edwin111

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