23 Mar Nutritional Deficiency and its Management in Apple Crop
सेब की फसल में पोषण की कमी और उसका प्रबंधन Apple plants/ fruits may exhibit following specific visual symptoms as well as reduction in growth and yield under nutrient stress. Nutritional Deficiency Symptoms Nitrogen: Shoots short, thin, upright and spindly, leaves small, normal in shape with pale yellowish green colour in early stage followed by orange, red purple, yellow tints starting with the older leaves, blossoming and fruiting reduced, fruits small with marked reddening and poor storage qualities. Phosphorus: Shoots short, thin, upright and spindly, leaves small, with dull purple and bronze tints, early defoliation of older leaves, blossoming and fruiting reduced, bud break in spring may be delayed. Potassium: Growth restricted and branches die back, leaves bluish green with slight marginal and interveinal chlorosis, followed by marginal scorching either brown or greyish brown colour, blossoms heavy in early stages but yields are poor, fruits small with poor quality. Calcium: Death of the growing points followed by die-back, scorching and upward rolling of leaf margins, margins ragged in appearance with tip leaves being affected first. Magnesium: Severe defoliation of terminal shoots progressing from base to tip, purple tinting and marginal or interveinal chlorosis of older leaves, leaves and fruit show heavy drops towards the end of growing season. Sulphur: Growth restricted, stiff, woody, thin and upright, yellowing of...