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Nutrient Deficiency Doctor
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 | Potatoes In 1997-98 there some trials in the UK & Idaho, US indicated that high levels of calcium in the tubers were associated with low incidence of rust spot in susceptible varieties like Russell Burbank. In truth, the link was largely circumstantial but the experimental conclusions were that foliar applications of Calicum from various sources could have higher yields and reduced internal blemishing. Foliar Calcium Nitrate can cure this problem. |  | Apples Calcium Deficiency in apples is shown by small circular blemishes on the skin with brown spots in the flesh below. This is caused either by lack of Calcium in the soil or irregular watering. |
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