I have started to see compost ingredients in a new light as I look for things to help build soil.
Has anyone tried chopping up green prickly pear cactus as a soil amendment. I am curious to know because the "gel" in cactus is what the plant uses to hold water for long dry periods. Besides being green matter, if the gel kept some of its water holding properties for a time after being cut, it could be very useful to place deeper in hugels or under trees. Thorns are a definite negative, but they too will break down.
My property is very efficient at growing prickly pear cactus and I do not intend to cut them all down.
Comments and thoughts appreciated if others have tried things that were successful.
I have noticed that some varieties of cactus tend to collect large quantities of minerals inside the plant matrix -- that can be seen when a cactus plant dies and decays. I don't want to overload my growing areas with this mineral if it is not good for my plants. The mineral has to be water soluble because it made it inside the plant. I guess I will have to get some of the mineral analyzed to see exactly what it is.
I am beginning to collect local cardboard and am trying to figure out the best way to break it down where it can be beneficial to the soil and not look like a trash heap.
I did manage to make some good compost with chopped up thistles and cow patties near a remote homestead in the mountains of southern Utah, at 6000 ft.
Interesting challenges you have my friend! I would recommend growing a lot of your compostables. I do know that you are in the desert and not much will grow well but try looking at the natural landscape and seeing what thrives. then propagate it! Also if you have good water access, you can start growing all kinds of fast growing invasives that fix nitrogen and thrive in desert conditions. I myself am trying to farm soil on a sanded over lot in Louisiana. similar challanges. I would scour the Plants for a Future database and then see if you can find any useful plants and where you could buy them. If you grow some desert hardy trees and mulch them over with cardboard and other mulch matter, you will do a lot to keep moisture on your property and increase your capability of growing plants for compost and mulch.
there is an old chinese proverb that goes something like this: "When is the best time to plant a tree?" "yesterday" "When is the second best time to plant a tree" "today"
I deeply believe in the wisdom of this proverb and try to live by it wherever I find myself.
Good luck and stay in touch if you find any seeds that would thrive in Sand and grow lots of biomass. If I find anything as I search on my end, I'll let ya know!
Get excited and Make things grow~!!!
This morning I read on another thread (I think in the hugelkulture or forest garden section) about someone digging a large, oval-shaped hole, for tree-planting, and filling one side with organic matter (I think they used piles of newspaper, though I know Paul doesn't recommend that), but any kind of OM you can get, for the first hole, then use that to grow mulching materials. They said that even in Arizona, they dug into the pile of newspaper and found it was still moist, and that moisture was helping to feed the young tree.
I have been successful in my dry, high elevation area, in getting comfrey plants to grow in the beds with my young fruit trees, and was able to trim off lots of OM last year from those and other understory plants, like Marshmallow herb, sunflowers, wild spinach, sunchokes that came up too thick, alfalfa and clovers, dandelions, and others. Most of my greens I feed to my small flock of chickens, who turn it into rich fertilizer for my garden.
I have noticed in my garden that it seems to work better to layer the cardboard UNDER my plants, in the bottom of a 2 ft deep sunken bed, and then pile sticks, meadow "hay", leaves or whatever else I can get, over the cardboard. Then the cardboard helps to hold water from sinking too deeply into the deep sand, so the whole bed stays moister. Cardboard, paper, and other mulch materials just laid on the surface tend to desicate in the intense summer sun. I have had "small" compost piles, built inside pallet walls, sit for a whole year and not break down at all. But the sunken beds seem to work much better for holding moisture and breaking down into soil.
As I mentioned previously, sometimes it is possible to gather thistles or other weedy plants: I have even collected dried tumbleweeds and chopped them into compost piles. When chopped into small pieces, and mixed with other stuff like grass, or cow patties, or whatever, in a large enough pile to keep the center moist, with a tarp over it to keep the pile from drying out, compost does happen even here.
Kevin Elmore wrote:Has anyone tried chopping up green prickly pear cactus as a soil amendment. I am curious to know because the "gel" in cactus is what the plant uses to hold water for long dry periods. Besides being green matter, if the gel kept some of its water holding properties for a time after being cut, it could be very useful to place deeper in hugels or under trees.
YES, we definitely do it here very commonly.
I just leave the base and the roots, and they will grow again.
I have made a post about it, dunno where it is...
Cut them at rainy season. They will rot. I always cut a pad at least in 2.
If you pile up, they rot better. Just cut what is growing from the cut pads.
If you bury: yes it will hold moisture and you can grow with them.
If they have no light, they will not come out.
With very little cover, yes some of them grow and come out. Very easy to see and cut...
I guess there less nutrient losses when you do not leave the stuff in the air...
A way to reduce evaporation with straw wood chip mulch would also be nice. Maybe you will just have to grow your own straw.
You best bet would be to get a pot and plant a vine in it. Water the pot and then have the vine grow 100ft in every direction.
With just a few of these pots with targeted watering and shade you could provide the entire area with shade and biomass.
Hopefully said vines don't produce too much seeds. If you want a tree and not a vine the figs will get the job done.
They produce the same amount of carbon with 3 times less water!
And straw is not a desert mulch because it is not produced there.
The best mulch is either stones or dry dirt!
What you do not want is compacted soil, because of water going away by capillarity.
Loose earth on the ground do the job.
Easy and cheap.
Being a big fan of permies.com, I’ve watched a lot of videos on Permaculture techniques.
In my own garden I tried to build a Hugelkulture bed without any wood logs. Instead I made cardboard box logs, (box inside a box inside another box, then stuffed with newspaper) and stacked them to form the bed. So if you are up to a little experimentation this is how I would try it.
Dig a 4x4x4 foot hole, because underground Hugelkulture seem to do better in the desert, stack the cardboard logs along the outside walls of your hole like you would build a brick wall. Then start dumping in your kitchen waste, shredded mail, newspapers, human waste, tumbleweeds, creosol weed and any other organic waste you can find. When you go into town, fill your truck with saw dust, grass clipping restaurant waste or anything else you can find. Shovel a thin layer of local dirt on top, after each delivery to kill the smell. Don’t make any special trips to town, but when you do make it worth the trip.
Now you’ve filled your hole with two key garden soil ingredients, carbon and nitrogen. Now you need water to break it all down. In the desert you need to direct your house hold waste water, sink and bath water to the hole. The cardboard will soak up the water and hold it as it breaks down the organic materials. It will take about a year for the carbon materials to totally breakdown. Worms and sowbugs will help.
If you build this site in partial shaded areas, (next to the house, out buildings or rock outcroppings) your plants will probably do better.
You could pipe your black waste water to the bottom of the pit and build nitrogen faster, but it would have to sit for a year before you started planting vegetables.
A pit toilet or outhouse could be built over one of these cardboard lined pits, but you will want to throw down some quick lime every once in a while to kill the smell.
Melons and tomatoes grew best the first year, after I built my cardboard Hugelkulture. But wood logs, seem to still work best, in my observations
Rory Turnbull wrote:Yucca Schidegra is a common ingredient in organic fertilizers and compost tea food sources. It contains steroidal saponins, which stimulate microbe and plant growth.
Only this one? Or yucca baccata as well?
The root has saponins as it was used as soap, or also the rest of the tree?
thanks for informing us about the use of saponins I did not know.
From my research, most plants that exhibit "extreme" (fast growth, hardiness, flavor/smell) properties will usually lend those properties through extracts and concentrates (IE kelp, kang kong, nettles, etc..), you just need to make sure they aren't detrimentally allelopathic (toxic to other/particular plants)
I have never used it for compost as I have only a surface natural compost at the moment...
It is drought resistant but may be not in a desert. It is first a marsh plant, and then it is able to adapt, when it has managed to get its roots down (a few feet! may be 10).
I really had to be careful for the planting and lost quite a few plants for lack of watering.
I am fond of it anyway!
Yucca baccata: (No Saponins)
Yucca schidigera: (Saponins)
All seem to have extremely valuable properties.
"Vetiver is so good for the desert, we used it to hide air conditioners at the Furnace Creek Inn in Death Valley."
So far I have not been able to see any real vivid difference in things planted on top of prickly pear -vs- baseline plots, but I will give it some time. I put the cactus fairly deep in the holes (to keep thorns out of the upper soil zone) so it make take a little time for the roots to get down to it.
I am planning to try Vetiver grass (CHRYSOPOGON ZIZANIOIDES)? Look at Vetiver.ORG for more information on this sterilized super grass. I plan to start a small nursery to grow my own sprigs from, but as Xisca has pointed out extra water will be required to get them established. I have several gullies that are in need of some serious stabilization and since the roots can go SO DEEP it might work.
I have also figured out that Chino Grama can be cut at 2-3 inches height and regrows nicely when we get moisture. Some clumps of Chino can be up to two feet across so I have begun harvesting this grass for mulch cover around fruit trees. I doubt that Chino will handle too many cuttings in a year without suffering and not reseeding, so I am watching for that possiblility as well.
I figured out that Greasewood (Creosote Bush) coppices nicely. I harvest the large limbs to lay down for shade/mulch and it regrows fairly quickly. The leaves will fall off after it dries, but the limbs seem to keep them trapped so they don't blow away in the high winds. I haven't put any Greasewood down in a planting hole yet, but I want to try that one too.
Another bush that coppices nicely is the Whitethorn Acacia. I have place the small branches of this plant down in planting holes. I also have it growing as a shade plant between figs and plums and it seems to be a well behaved plant. It is a nitrogen fixer so that is another bonus. I have found that when I prune the acacia and use the pruners to cut up the trimmings in 1" pieces they lock in place pretty well and form a rough form of wood chip mulch.
I am experimenting with dead clumps of Ocotillo and have found that they are great at locking grass/mulch down in areas where high winds would otherwise blow them away. I have used them this way in several gullies and seen their benefit in locking down soil that is washing away after a heavy shower.
That is all for now.
Kevin Elmore wrote:I am planning to try Vetiver grass (CHRYSOPOGON ZIZANIOIDES)? Look at Vetiver.ORG for more information on this sterilized super grass. I plan to start a small nursery to grow my own sprigs from, but as Xisca has pointed out extra water will be required to get them established. I have several gullies that are in need of some serious stabilization and since the roots can go SO DEEP it might work.
I have done this in a separate post in the right forum for not sharing here...
There is a way to keep watering under control at the beginning, I did some vetiver snakes in pipes before planting in their place.
(López, 2000); as an adherent for paint when added to lime (Ramsey, 1999); or to increase water infiltration into the soil (Gardiner, Felker and Carr, 1999).
Agro-industrial utilization of cactus pear, FAO, 2013, p.19.
Gardiner, Felker and Carr (1999) reported the first experiments on the use of cactus pear extracts for improving water infiltration in soils. After comparing polyacryl amides (PAM) with an undiluted and a diluted extract of cactus pear cladode, the authors found that use of this extract matched the infiltration rates found using PAM. However, many questions remain concerning this research, including the durability of the effect and how the extracts work in the soil. Again, follow-up R&D is recommended."
Agro-industrial utilization of cactus pear, FAO, 2013, p.99.
Gardiner, D., Felker, P. & Carr, T. 1999. Cactus extract increases water infiltration rates in two soils. Comunn. Soil Sci. Plant Anal. 30 (11–12): 1707–1712