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Flashcards in part 1 Deck (8)
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macronutrients include

carbon, hydrogen, oxygen, nitrogen, phosphorus, sulphur, potassium, calcium and magnesium



iron, manganese, copper, molybdenum, zn, boron, chlorine and nickel



Julion Vonn Sachs in 1860, demonstrated that plants could grow in defined nutrient solution in the complete absence of soil


name of some non- mineral nutrients

carbon, hydrogen and oxygen


nitrogen and its deficiency symptoms

mainly absorbed as nitrates but some are also taken as nitrites or ammonia. Deficiency: 1. stunted growth
2. premature leaf fall
3. chlorosis


phosphorus and its deficiency symptoms

constituent of cell membrane, certain proteins, and all nucleic acids and nucleotides. absorbed by the plants in the form of phosphate ions
deficiency: 1. stunted growth
2. chlorosis that appears first in older leaves


potassium and its deficiency symptoms

absorbed as potassium ions and required mainly in the meristematic tissues, buds, leaves and root tips
deficiency: 1. yellow and shrivelled leaf margins
2. mottled interveinal chlorosis


calcium and its deficiency symptoms

present as calcium pectate in the middle lamella of the cell wall
deficiency: 1. chlorosis in the young leaves
2. necrosis
3. curling of leaves