A Manual for Citrus Growers1947 - 141 páginas |
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Página 33
... symptoms of all three of these are frequently observed on tree crops . The usual approach to the problem has been by leaf analysis but since we do not know just what amount represents a sufficiency in a leaf , no conclusion can be drawn ...
... symptoms of all three of these are frequently observed on tree crops . The usual approach to the problem has been by leaf analysis but since we do not know just what amount represents a sufficiency in a leaf , no conclusion can be drawn ...
Página 70
... symptoms in common - a flecking type of leaf marking . A less common type of leaf marking in some virus diseases is characterized by crescent shaped , gummy breakdowns . Virus diseases which have a flecking type of leaf symptom simi ...
... symptoms in common - a flecking type of leaf marking . A less common type of leaf marking in some virus diseases is characterized by crescent shaped , gummy breakdowns . Virus diseases which have a flecking type of leaf symptom simi ...
Página 87
... symptoms . Clearly , it is the availability of an element , not total amount , that counts . In addition to the 11 elements listed in Table 1 , citrus trees and fruit contain traces of most of the following constituents : aluminum ...
... symptoms . Clearly , it is the availability of an element , not total amount , that counts . In addition to the 11 elements listed in Table 1 , citrus trees and fruit contain traces of most of the following constituents : aluminum ...
Índice
Chapter Page 1 SOILS CLIMATE WATER | 2 |
CITRUS TREES | 4 |
IRRIGATION PRACTICES | 11 |
Direitos de autor | |
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Palavras e frases frequentes
100 gallons acid alkaline ammonia amount applied areas black scale boxes per acre brown rot carbon cause chemical chlorosis Citrus Diseases Citrus Experiment Station citrus fruits citrus growers Citrus Leaves citrus trees copper COST PER ACRE County cover-crops crop cultivation Cultural Cost damage dust effective fertilizer field boxes foliage fumigation fungus furrows grapefruit grove growth heavy inches injury insects irrigation irrigation water juice leaf lemons lime manganese deficiency manures material mealybug method mixture moisture Mutual Orange Distributors navel navel oranges nitrate nitrogen oil spray orchard organic matter packed boxes parasites percent pest control phosphate phosphorus plow-sole potash pounds production profitable pruning red scale red spider rind root zone rootstock Rough lemon scaly bark Septoria soil sucker sulphate sulphur symptoms temperature thrips treatment trifoliate orange trunk usually Valencia orange virus weeds windbreak wood young trees zinc deficiency zinc oxide zinc sulfate