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Biodigester effluent fertilizer quality (IRRI)
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==== Balancing Proportions between Major Ions in Soil ==== {| class="wikitable" | Major Ions in Soil | Proportion | Notes |- | Calcium, Ca | 50 | |- | Magnesium | 35 | add Epsom salt or dolomite if Mg deficient |- | Potassium, K | 6 | adding K increases Na |- | Sodium, Na | 5 | Na displaces Ca |} <ref>Mollison, Bill. Permaculture a Designers Manual. Tagari, 1988.Pg 190- 198.</ref> ===== 1.Iron ===== * aids chlorophyll synthesis * Deficiency results in yellow or white spots between the veins of new leaves, which is followed by dead leaf tissue. * Excess results in bronzing leaves and tiny brown dots. ===== 2.Maganese ===== * Activates enzymes * Deficiency results in yellowing between veins and mottling of young leaves. * Excess results in brown spotting surrounding by a chlorotic circle on older growth. ===== 3.Boron ===== * Forms part of Cell wall * Deficiency can result in the death of new growth and leaf deformation with areas of discoloration. * Excess results in yellowing of leaf tips followed by the premature death of cells and new tissue giving a scorched appearance to leaves. ===== 4.Copper ===== * Component of enzymes ===== 5.Zinc ===== * Activates enzymes * Deficiency can result in yellowing of veins in young leaves and stunted leaf size. * Excess can result in iron deficiency in some plants. ===== 6.Molybdenum ===== * Involved in Nitrogen fixation
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