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Plant gene conservation
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Book
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Chapter
The Fruit
The early stages of fruit development often depend critically on environmental factors and the crop will fail unless a good set is obtained. Inadequate pollination is a frequent cause of poor crop setting; low...
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Chapter
Vegetative Propagation
The vegetative plant of most species can reproduce without flowering and forming seed. Reproduction of this type is termed vegetative propagation and. is often the main way a plant multiplies. Vegetative propa...
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Chapter
The Seed
Many horticulturists must have been introduced to their subject by becoming enchanted by the picture on some seed packet. These simple packets may be all that is necessary to protect the seed during its months...
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Chapter
The Vegetative Plant
We have seen in the previous chapter that the early growth of seedlings can be likened to earning compound interest and that this is termed exponential growth. We also saw the prodigious growth of one frond of du...
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Chapter
The Flower
Sooner or later the vegetative higher plant undergoes a profound change and flowers. Even casual observation will reveal that many species have sharply defined seasons for flowering. Some seasonal change induc...
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Chapter
The Seedling
The growth of any living thing ultimately depends on photosynthesis — the process by which green plants use the sun’s energy to build complex organic chemicals from simple inorganic substances. Even the carniv...
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Article
The suitability for canning of some potato varieties
Unreplicated plots of up to 29 varieties were grown for three years at a high plant density and until maturity when the dry matter content and canning characteristics of the 20–40 mm grade tubers were assessed...
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Article
Some effects of plant spacing on potato quality
As plant population was increased so the dry matter content of the tubers increased, but delaying harvest had little such effect. Tubers of 2–3 cm (or 2.5–3.0 cm) had a lower dry matter content than tubers of ...
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Article
Plant Population and Crop Yield
UNDER the above title, Holliday1 has recently published an equation which describes in a number of cases the relationship between yield and density in crop plants. In its simplest form this relationship is : ...
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Article
Gravimorphism and Root Formation
IT has previously been reported1,2 that gravity can affect the growth and flowering of trees. The results to be described indicate that gravity may also affect the growth of some herbaceous plants in that the ori...
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Article
Interspecific Competition in Higher Plants
THE results of experiments on interspecific competition between vegetable crops and annual weeds suggest that a relationship exists between the crop weight and weed weight per unit area when the relative densi...
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Article
Atmospheric Pollution and Plant Growth
A RECENT review of the literature relating to gas damage to plants1 refers to many works on the effects of sulphur dioxide and other gases. Few of these works deal with the direct effect of gaseous atmospheric po...
