Charles Rehoboth

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since Jul 10, 2020
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Recent posts by Charles Rehoboth

Update: I kept digging, and ended up getting a good long trench at 5+ feet with no water. Close to the intended greenhouse site I hit bedrock and could only dig to 2-3 feet, so made basically a ramp down to the good part of the trench.

We then put 500 feet of 1" PE-RT pipe, insulated the part on the ramp, and backfilled all but the last 2 feet of depth (because I still need to run electrical service to it) before giving the excavcator back. Thanks everyone!
7 hours ago

William Bronson wrote:Ground/air heat transfer through groundwater could be problematic.
If you want to go deeper,  for the heat, switching to a PEX pipe liquid based system seems in order.
Hell, the hard part of any geothermal tends to be the digging.



A PEX liquid system, that's brilliant. Do you then just rig up a radiator and fan, plus some sort of pump to circulate it?

And you don't think the groundwater will chill it too badly in winter?

I don't object to doing the digging, as long as I'm not just wasting effort -- the thought of doing all this, just to get whatever temperature air I was already standing in, was what made me pause.
4 days ago

Michael Fundaro wrote:If the water is exposed to cold air, and colder air sinks into the hole, the water will freeze.  Dig down as deep as you had planned, let it warm up in the sun during the day, cover with foam insulation, plywood, cardboard, blankets, and plastic and check it in the morning.  In theory it should not be frozen.  Run your pipes, cover with sand or pea gravel or whatever you plan to use around the pipe, put down a layer or two of 2" foam insulation and cover that with dirt.

Good luck.



Thanks for the reply. I think you're right that the water won't freeze if I do that, but is the ground really warm enough at that depth to be worth digging the trench? All the geothermal stuff I've seen seems to say 6 to 10 feet. We did have our water supply pipe (at 4-ish feet) freeze several years ago, now that I think of it. Not here at the farm, but same area, and that has to mean that the soil at that depth doesn't stay at 50 degrees as I was hoping to see.

Argh.
5 days ago
So we started digging trench for earth tubes today with a mini excavator, and this is what we got:

After about 4 feet, you get water, and it freezes -- which on the one hand doesn't surprise me, because it's 20 degrees here, and on the other hand does surprise me, because isn't the ground that far down supposed to contain more heat?

The excavator can go deeper, but it seems like there isn't any point if we hit water at 4 feet.

Should I just abandon the earth tube idea, then, and consider other ways to heat the greenhouse?
1 week ago

Ellendra Nauriel wrote:
I'm old enough to remember when Red Delicious actually lived up to the name. They were crisp, sweet, and tasty.

Then for a while, Golden Delicious was the best. The ones in the store now are nothing at all like they once were.



I'm intrigued by the argument that soil quality has to do with decreasing flavor, and I wouldn't be surprised if there's something to that. At the same time, remember cultivars aren't a monolithic thing without variation within them, so suppliers could also select for "Red Delicious" that favor bruise resistance and long shelf life over flavor or nutrition. Dwarfing rootstocks don't live nearly as long as seedling and Antonovka, and commercial growers favor dwarfing rootstocks ( = no pickers on ladders ), so their trees are getting replaced with some regularity.

Does fruit quality from the same tree seem to decline as time passes? That seems like the big question here.
2 weeks ago
We put in a Calville Blanc tree last year, this makes me really really look forward to it bearing fruit. I had not realized that's the right thing for Tarte Tatin.

Hey, a little off subject but does anyone know why Northern Spy takes so much longer to bear fruit? I had thought the 14-year figure sounded a little fanciful but then talked to a friend who commented that her family's Northern Spy had just borne fruit, and sure enough, they put it in 14 years ago.
2 weeks ago
Sorry for the random curiosity, but what was the yellow car on top of the Ford wagon?
2 weeks ago
We looked for a farm for a long, long time. Not as long in actual years as some of you but it felt like an eternity, especially since our family was growing and our little townhouse was not.

And one night in reading God's Word, I came across:

[Gen 26:18-22 NKJV] And Isaac dug again the wells of water which they had dug in the days of Abraham his father, for the Philistines had stopped them up after the death of Abraham. He called them by the names which his father had called them. Also Isaac's servants dug in the valley, and found a well of running water there. But the herdsmen of Gerar quarreled with Isaac's herdsmen, saying, "The water is ours." So he called the name of the well Esek, because they quarreled with him. Then they dug another well, and they quarreled over that [one] also. So he called its name Sitnah. And he moved from there and dug another well, and they did not quarrel over it. So he called its name Rehoboth, because he said, "For now the LORD has made room for us, and we shall be fruitful in the land."



We are Rehoboth Farm: our own little corner where the LORD made room for us, and where we pray that we will be fruitful for Him.
3 weeks ago

Douglas Alpenstock wrote:On the "pro" side: you can crack open the windows for better ventilation in summer, and let pollinators in.



Are you envisioning a hinged mount for the window frames? Or mounting a door by its existing hinges (one or two weren't sliding doors and do have hinges left) ?
2 months ago
I really like your design! Using those adjustable shelves from fridges was clever, too. If it's strong enough to hold a few 8-pound gallons of milk...

Would fender washers really spread out the load sufficiently? Or are the deck screws and fender washers for if I keep the frames in place? I know they make some sort of rails to support the glass, with gaskets, for the prefab kits but I am not having luck finding it separately.
2 months ago