Search results
Results from the WOW.Com Content Network
Modern seed sizes range from 0.0001 mg in orchid seeds to 42 kilograms (92 lb 10 oz) in double coconuts. [7] [2] Larger seeds have larger quantities of metabolic reserves in their embryo and endosperm available for the seedling [8] than smaller seeds, and often aid establishment under low resource availability. [9]
Banana plants are among the largest extant herbaceous plants, some reaching up to 9 m (30 ft) in height or 18 m (59 ft) in the case of Musa ingens.The large herb is composed of a modified underground stem (), a false trunk or pseudostem formed by the basal parts of tightly rolled leaves, a network of roots, and a large flower spike.
Intensive crop farming is a modern industrialized form of crop farming.Intensive crop farming's methods include innovation in agricultural machinery, farming methods, genetic engineering technology, techniques for achieving economies of scale in production, the creation of new markets for consumption, patent protection of genetic information, and global trade.
Among plants, size asymmetry is context-dependent and competition can be both asymmetric and symmetric depending on the most limiting resource. In forest stands, below-ground competition for nutrients and water is size-symmetric, because a tree's root system is typically proportionate to the biomass of the entire tree. [ 22 ]
A food web starts at trophic level 1 with primary producers such as plants, can move to herbivores at level 2, carnivores at level 3 or higher, and typically finish with apex predators at level 4 or 5. The path along the chain can form either a one-way flow or a part of a wider food "web".
Polyphagous species (animals that eat plants from many different families), on the other hand, produce more detoxifying enzymes (specifically MFO) to deal with a range of plant chemical defenses. [19] Polyphagy often develops when a herbivore's host plants are rare as a necessity to gain enough food.
The Global Crop Diversity Trust is an independent international organisation which exists to ensure the conservation and availability of crop diversity for food security worldwide. It was established through a partnership between the United Nations Food and Agriculture Organization (FAO) and CGIAR acting through Bioversity International. [25]
Plant nutrition is the study of the chemical elements and compounds necessary for plant growth and reproduction, plant metabolism and their external supply. In its absence the plant is unable to complete a normal life cycle, or that the element is part of some essential plant constituent or metabolite .