04a. Pot trials – Apsara research farm Cambodia

Pot trials were set up with Cambodia’s Department of Agriculture and Community Development (APSARA authority) research farm.
Soil was amended with combinations of biochar, compost, lake sediment and organic fertiliser (produced from pig manure). 7 treatments and 4 replicates were set up initially for lettuces grown in pots. The lettuce were then replaced with cabbages, then more lettuces were grown, with no extra amendments incorporated.

Dr Tan Buon Suy from the Apsara Authority is managing the pot trials with his staff at the research farm.

Discussions about the lettuce trials with Dr. Buon Suy. March 2010. Photo by Alan Stuart-Watt.

Discussions about the lettuce trials with Dr. Buon Suy. March 2010. Photo by Alan Stuart-Watt.

The soil amendments aim to improve the soil for growing vegetables, and the weight of the plants (roots and above ground biomass), number of leaves and total plant length (including roots) will be recorded to determine each treatment’s effectiveness.

1st cycle

The lettuce seedlings for the first trial were transplanted into the pots on 24.02.2010 and were harvested on the 26.03.2010. A positive correlation was found between all the measurements and the amount of biochar added.

Pot trials, 1st Lettuce trial Apsara research station, 26.02.10

2nd cycle

Cabbages were grown on this cycle. Unfortunately there were some issues with pests so it was not possible to get information on all treatments.

3rd cycle

The third cycle, lettuces again was underway in May and harvested June.

Lettuce pot trials, Tuk Vil on day of harvest 17.06.2010

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