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

Sulfur (S)
Sulfur is a component of vitamins and some amino acids essential to coen-
zymes and metabolism. Symptoms of sulfur deiciency and nitrogen dei-
ciency are similar because both of them are components of protein. Sulfur
deiciency symptoms include chlorosis, undergrowth and accumulation of
anthocyan. Unlike nitrogen, the symptoms irst appear on mature and
young leaves because sulfur cannot easily retransfer to young leaves in most
species. 
Phosphorus (P
)
Phosphorus is a component of major compounds forming plant cells in-
cluding intermediaries between breathing and photosynthesis, and phos-
pholipids which form plant cell membranes. Phosphorus is also a
component of nucleotides used for plant energy metabolism, DNA and
RNA. Phosphorus deiciency causes growth delay in young plants, and
leaves taking on a dark blue hue. In some species, leaves turn a little purple
due to overproduction of anthocyan. Another symptom of phosphorus de-
iciency is that the stems become thinner and old leaves die. Maturity of
plants is also delayed. e element is an important mineral nutrient for en-
ergy storage and plant structure. 
ULC영어본문.qxp_레이아웃 1 2016. 2. 19. 오후 6:44 페이지 218

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Making Organic Farming Inputs
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Silicon (Si)
Plants accumulate a signiicant amount of silicon in their tissues. An ade-
quate supply of silicon stimulates growth and reproduction. If silicon is de-
icient, plants easily topple over and become vulnerable to pathogens.
Silicon becomes soluble to be mainly accumulated in endoplasmic reticula,
cell walls and intercellular space in the form of atypical silica. Silicon can al-
leviate the toxicities of many heavy metals. It is an important mineral nutri-
ent for energy storage and plant structure.