HORTICULTURE

  Introduction The structures which facilitate propagation of plants are called propagation structures. Propagation structures are required for propagating plants by seed, cuttings and grafting. Propagation structures are of two types; i) The first type a structure with temperature control and ample light, such as a green house, modified quonset house, or hot bed-where seeds can be germinated or cuttings are rooted or tissues culture micro-plants are rooted and acclimatized and the ii) The unit is structure into which the younger, tender plants can be moved for hardening, preparatory to transplanting out-of-doors. Cold frames, low polyethylene tunnels or sun tunnels covered by saran cloth and lath-houses are useful for this purpose. Greenhouse It is a structure constructed of cladding materials like plastic, polythene and fibre glass material having temperature control and ample light availability needed for propagating plants by seed, cutting and grafting. Experiments have...