In 2015 growth differences between the two beds were
difficult to see with the harvests of squash, cucumber, and tomatoes, so this
year potatoes were chosen to make it easier to measure any differences between
the beds. We will be able to count the number of potatoes grown in each bed,
their total weights, and relative sizes. In addition, we will be able to
compare factors of quality such as blemishing and scabbing, as well as taste.
As in 2015, the OSU Master Gardener Plant Clinic tested the
soil. The results showed the two beds almost identical except for low Nitrogen
and high Phosphorus. The biochar bed also had about half the Magnesium of the
control bed. Both sides tested identically in the other chemicals and in the
textural qualities of humus, sand, silt, and clay.
April 24, 2016: Approximately one cup of Magnesium sulfate was added to the control bed and two cups to the biochar side. About two cups of ground feather meal was added to both sides to increase nitrogen. No additional compost was added to the beds this year. Both beds were double-forked prior to amending, and the top 8” – 10” forked again afterwards.
April 26, 2016: A 6” deep X 10” wide trench was dug lengthwise down the middle of the beds and sixteen (1 kg), Russett Burbank seed potatoes from Windmill Farms were laid on the bottom of the trench every 10” – 12” and covered lightly with soil. The potatoes were already sprouting, so care was taken to avoid breaking the sprouts. Soil will be added as the potatoes grow. Excess potatoes will be donated to the local food bank.
May 10, 2016: Potatoes are coming up! Weather has been hot, so may have to hand-water until scheduled overhead sprinkling begins.
