Thursday 1 May 2014

The 2013/14 Data Gathering Project



This is the presentation given at the NAGA AGM on 12 April 2014





AUTUMN PLOWING / SPRING ROTOTILLING, COMPOSTING, plus some additional info on (STONES, WEEDS and HARD CLAY)


Data was gathered both on Autumn 2013 and Spring 2014; it was collected from several allotment gardens, farms and consultation with fellow gardeners.

Where information came from:


Problems: Big stones in gardens

Immediate action required before May rototilling:
  • Removal: the stones can damage plow equipment, even rocks the size of apples could damage prongs of rototiller.
  • Walked around the garden and saw several large rocks, one nearly 2ft x 3ft!
  • We need to remember that these gardens plots are part land-refill (i.e.: clay, rocks, pavement chunks, concrete pieces with metal, etc.) all of which would damage the farmer’s equipment.


Proposed Actions:
  • NAGA Board sends communication to all gardeners to identify and remove any large rocks as soon as gardeners came across them, at any time of the year. If these rocks are too large for one person to safely handle, we’ll help. 
  • I removed some rocks last fall before freeze-up and will champion this project but need assistance of several strong bodies and our riding-mower/trailer to immediately haul them off to our stone drop-off pile before rototilling begins.


Plowing / Rototilling


NAGA standard practice:
  • Autumn: plots are plowed
  • Spring: plots are rototilled

Other Allotment gardens standard practices:
  • Spring: gardens are rototiller
  • Autumn: NO plowing/ rototilling

"Backyard gardener's" standard practice is usually just a spring cultivating of their garden plot.

Farmers in the area have moved onto minimum soil cultivation, i.e. one plow disc, or single harrow between rows of the previous years crop.

The city-contracted farmer who plows our allotment gardens questioned me as to why we plow in the autumn. He stated that rototilling is enough and is all that is required. Benefits of big money ($) to be saved here, plus the added environmental benefits of no additional plowing.


“Plowing/Rototilling Experiments” done at the gardens last autumn and this spring 

  • Experiment #1: two plots P290, P283 were not plowed in the autumn, they will be rototilled only this SPRING. This was a 'worst case' plot selection; as both these plots are heavy clay (had never had composting), and were in a low area under several inches of spring water melt. 
  • Experiment #2: 1/3 of plot P289 rototilled only in the autumn; 1/3 of plot P289 was rototilled only in the autumn, with 6 bags of leaves (not shredded) added prior to rototilling; 1/3 of plot P289 was rototilled only in the autumn with 6 bags of shredded leaves added prior to rototiling. 

Action: Compare the cultivation results between all plots in May (depth of rototilling and amount of soil break-up), and if results are comparable, do only Spring rototilling in the future.


*Additional food for thought: could it be done in Fall vs. Spring? 
  • Pros: not waiting on the city’s spring plowing time schedule, you could plant when you wanted to, and also plant some crops on your annual in the fall (e.g: garlic); and 
  • cons: would our clay soil be better aerated/broken up by waiting until soil is completely dried later in the spring?

Composting

  • Troy, Wisconsin (USA) allotments: everything is composted right on each individual’s plot.
  • Boone Plantation Commercial Farm, Charleston, SC. (USA): everything is composted on same spot where it was harvested. All farmers compost on the same harvested field.
  • Blackburn: some gardeners do compost on their plot. The rest move their compost to the edge of their plot in the fall. A farmer is then hired ($) to clear it to the far end of the field. Once there, it is NOT USED  (as in never) as the gardeners find it too much work to reclaim it. The Chair cannot get any action or consensus on composting on the plots, is frustrated and has given up.
  • Kilborn: everything is composted right on each individual’s plot.


NAGA: we are the only ones to have compost bins.

As of today there are “ 22 COMPOST BINS” on the grounds, ... 20 small, 2 large. There also appears to be 18 additional new bins made from pallets (looks kind of fort-like) at the fire-station end of the gardens, ...some have compost in them, locks on them, others have garden fencing, poles, cages, chairs stored in them.

EVERY COMPOST BIN is presently FULL and/or OVERFLOWING onto the surrounding area. We seem to be inundated with the stuff! They also have GARBAGE and STONES thrown into and around them. Gardeners who have the temporary bins next to their plot have to move the soil back to level their plot every year because the tractor can’t plow or rototill in the desired direction because the bins are in the way.

                                 
Currently gardeners are encouraged to carry their plant material from their plots and place it in “TEMPORARY BINS.” As these fill-up, all the compost is moved again to large “HOLDING BINS” to compost for a year. It is then turned over and any un-composted material is moved to a “Second Bin.” Gardeners are then encouraged to dig out the composted material and return it back on their garden plots. As this is very heavy and hard work and getting volunteers has not been a reliable solution, money is paid out ($) to do the emptying, transporting, and turning the compost throughout the season.

Reasons given by NAGA gardeners on why they don’t compost on their own plot:

  • Some gardeners thought “they were required” to tidy and remove all season-end plant materials off their plots each fall. NOT TRUE, just cut up pieces into small enough bits so as not to tangle the rototiller. 
  • Some were afraid of plant diseases if left on plot and not going through a full year of composting. NOT TRUE, discard any diseased plants to the garbage immediately as you would normally do. ALL FARMERS compost directly on their fields, I’ve been doing it for over 15 years on my plot with zero problems
  • Most gardeners I polled don’t use the binned compost as they find it too hard physically to separate out the uncomposted materials, rocks, plastic, glass, wood pieces, twine, rope etc. They preferred the free ($1000/yr) mushroom compost provided by NAGA in the spring. 
  • Some were concerned that leaving weeds to compost on their plots would result in hugely larger number of weeds sprouting next spring. NOT TRUE, you will always have weeds. Just the physical act of pulling one weed that has gone to seed will disperse hundreds of seeds onto your plot. 

Most of our NAGA garden’s common weeds produce anywhere from a few hundred - to thousands of seeds per full mature plant. And the seeds can remain fertile in the soil for years, for example a single lambsquarters plant can produce 39,000 seeds in one season and can germinate up to 40 yrs later. Scary eh!?!  Miss one weed (or your neighbour misses one), add in the results of plowing/ wind/ birds and every plot will get more than its fair share of weeds every year. I did three walkabouts of our allotment gardens last year (early summer, late summer, and fall). Every plot always had some weeds, ...including my own!


Proposed Actions: 

  • Removal of these temporary bins and Phase Out the Large Holding Bins. Seems these temporary bins are very labour intensive and also just too convenient a drop-off spot for strewn garbage and stones. This will get gardeners doing their own composting on their own plots, putting garbage where it is should be, (in the main garbage bins) and taking their stones to the rock pile. 
  • And here’s an Easy-Lazy Way to do it ...with no lugging heavy stuff from bin to bin to bin and then back to your plot: Just leave your compost material right there on your plot where it came from!!! ...your soil will thank you.


Darn Weeds

Here’s some tips on how to manage your weeds:

  • Pull/hoe weeds regularly “before they go to seed,” and leave them to dry-out in a sunny spot in your garden for mulch. Expect the same of your neighbour. 
  • Remove (or dry-kill) ALL quackgrass rhizome roots before you plant your garden, they will just continue to spread through your crop and then they’re really hard to remove. Dig a trough around the grassy side of your plot to prevent entry of these grass rhizomes. 
  • Use plenty of mulch to keep weeds from sunlight and inhibit growing. 
  • Plant veggie rows close together to shade out weeds. 
  • Make a little time for weed control each time you visit your plot, ...it’ll pay huge dividends and give you time for more visiting with your fellow gardeners.

 Hate your hard clay soil?

We understand, yes it soaks up water like a sponge, and gets rock-hard when dried out ... but it does have tons on nutrients/minerals in it for your plants.

So we did a Leaf Shredding/Composting Experiment last autumn to help out the hard clay:

  • I bought a used leaf shredder and Ron Elmer (with his generator) shredded leaves (free leaves from the curbside) and added them to 4 plots. Shredded leaves compost very fast compared to full leaves and don’t blow around during the winter. 
  • Curious of the result? Check out the soil structure improvement results due to added leaves/shredded leaves on these plots P221, P229 (perennials), and A86 (annual). 
At the AGM I brought a 14 inch long, straight carrot I dug up on April 11  from my perennial plot P221. My plot has 15 years of just adding a few bags of leaves from the curb each year. A great improvement from the 1st year I dug my hard clay plot, bent the prongs on my digging fork, and had stunted short carrots. 

With a Leaf Shredder one can add way more leaves and amend the soil quicker. An added bonus is you don’t have to dig the leaves into the soil to prevent the wind from blown them around in the fall/winter.

*note: if you use a substantial amount of leaves or wood chips to amend your soil composition, you WILL HAVE TO ADD a bit of Nitrogen fertilizer to the soil to replace the Nitrogen used up in the composting of the leaves and wood chips! 

  • I will also use these chopped leaves as mulch during the growing season to control weeds and retain moisture for the plants. Bonus ...it’ll turn into compost by next year. 
  • So if you can’t grow long straight carrots in your hard clay, simple...just keep adding some leaves along with your plant residue to compost right on your plot!

Any interest out there in the community on exploring the benefits of the leaf shredder? ...let us know.

I hope to put together some information deck for our website soon, on Introduction to Managing your Soil better with Organic Gardening, other methods to improve soil structure and using less chemical fertilizers but still getting way more nutrients into your veggies. 

Happy gardening! 

Jim