Jadam organic Farming & Gardening : The Way to Ultra-Low-Cost Agriculture, Make All-Natural Fertilizer, Pesticide and Microorganism Inputs Yourself

8. JADAM sulfur (JS)
JADAM sulfur (JS) is also called red clay-sulfur. It is very effective
against most diseases, and diseases do not develop resistance. Unlike lime-
sulfur mixture, JS is made without heating, does not damage plastic and
steel pipes of greenhouses. Effective against black spot, pear rust, powdery
mildew, downy mildew, etc. Making 1 L (0.26 gal) of JS (25% sulfur) only
costs 50 cents. 100 L (26 gal) of JS can be used 60-100 times (diluted in
water to make pesticide of 500 L or 132 gal). JS can be used with com-
mercial organic or chemical pesticides; but always do a mixture test and
concentration test before use. Developed by Youngsang Cho. 
Prepare a 110 L (29 gal) container that is heat-resistant. Put in 25 kg
(55.12 lb) sulfur, 0.5 kg (1.1 lb) phyllite, 0.5 kg (1.1 lb) red clay, 1.5 kg (3.3
lb) sea salt. Strictly adhere to the sequence. Do not use containers that cannot
stand heat. Wear protective gloves, shoes, jacket and goggles.
Put in 20 kg (44.1 lb) caustic soda; pour in exactly 50 L (13.21 gal) of
water. Pour the water in at once. Take caution: if water is too little or weather
is too hot, it can over-boil. If weather is warmer than 27°C (80.6
℉
), pour
54 L (14.3 gal) of water.
Use 1.2 m (3.9 ft) long wooden stick to gently and thoroughly stir so
that ingredients are well mixed with water. Do not use metal (aluminum)
sticks.
Temperature will exceed 80°C (176
℉
) and sulfur will start to melt. Have
1-2 L (0.26-0.53 gal) of water handy to add in in case it over-boils.
Check with the stick that there is no remaining sulfur on the bottom.
Stir thoroughly and dissolve completely. If you stir slowly for 20 minutes
while the heat is high, all the sulfur will melt.
Add second water of 32 L (8.45 gal) (if irst water was 54 L or 14.3 gal,
add 28L or 7.4 gal). Keep stirring. Let sit for 1-2 days. Take out the clear
upper portion, put in thick plastic bottles for storage. If you leave it in the
container you made it, layers with different sulfur concentration can form.
Do not use the bottom sediments. If there are particles, you must use felt
ilter to clean the liquid before use. No expiry.
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Natural Pesticides 
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Mix 0.5-2 L (0.13-0.53 gal) with water to make 500 L (132 gal). Start
from 0.5 L (0.13 gal) for greenhouses, and 1 L (0.26 gal) for open ields; in-
crease in 0.2 L (0.05 gal) increments. Use 1 L (0.26 gal) during lowering of
fruit trees. For fog machines, use 0.1 L (0.026 gal) for 17 L (4.5 gal).
Use JS only when disease has broken out. If you use too much repeatedly,
it can cause growth problems. Grapes, persimmons, walnuts and greenhouse
crops are sensitive to JS; take caution in increasing the dose. 
Sulfur had excellent germicidal effect so was used in farming for cen-
turies. But farmers cannot use it easily because it melts at around 113°C
(235.4
℉
), but does not mix with water. Since the boiling point of water is
100°C (212
℉
), boiling water is not able to melt it. Boiling point of oil is
above 200°C (392
℉
) so can melt sulfur. However, oil does not mix with
water so cannot be used as pesticide. is is why lime-sulfur method was
introduced which uses the intense heat produced by lime. is method is
widely used to date. e problem of lime sulfur is that you need a very
strong heat in the process and is difficult to do with simple apparatuses. It
takes a very long time to make. Lime sulfur can cause serious concentra-
tion problems when used during growth period; so has been mostly lim-
ited to use for winter. Worse still, it can damage the plastic and steel pipes
in a greenhouse. 
To overcome the shortcomings of lime sulfur, Mr. Geunho Gim devel-
oped a method that does not use lime to melt sulfur. I was impressed and
have since thought hard on coming up with a method that can make sul-
fur easily available for use for everybody. I did not want expensive ma-
chines or too high a heat being a necessity in the making. Moreover I
wanted to raise the sulfur level to increase the germicidal effect and to
minimize the byproduct to reduce environmental footprint.
If JADAM could come up with a method that, for example, allows any-
body to melt sulfur in a gas stove, that would be an innovation. e whole
world would be surprised. I continued my experiments but to no avail. I
inally concluded that such thing was impossible. en I came across this
information that lye (caustic soda, or sodium hydroxide) was being used
for making sulfur when I participated in a workshop organized by Mr. Gi-
whal Bak of Yesan. I came back and observed the water-lye reaction
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JADAM Organic Farming 
through various experiments. But melting 100 percent of the sulfur was
not easy. I pressed on with my experiment. I added many different ingredi-
ents and carefully controlled the ratio of water, lye and sulfur. After nearly
100 experiments, I found the method to completely liquefy sulfur. I still
do not forget the rapture I felt at that time. My small kitchen was my lab;
it was around 3am that I knew that I inally made it. 
But I wanted to make even further progress. I wanted a method where
you do not need heating at all; do not need steel containers but can use
plastic containers; and shorten the making time to less than 10 minutes.
is time it was easier. After about 10 more experiments, I inally found
the way. I named this “JADAM sulfur.” What I immediately did, instead
of patenting it, was to disclose this knowledge. Cost was less than 50 cents
per liter (0.26 gal); it could be made simply in less than 10 minutes with-
out having to heat it; and it could be made in plastic containers. How eas-
ier could it get? e whole nation was excited. All over the nation,
members sent reports on the result of putting this method to practice. It
was extremely effective. JS caused very little concentration problem unlike
other sulfur products even when used during plant growth. Another great
feature of JS is that it does not damage the plastic and steel pipes of the
greenhouses. Below is explanation with pictures.