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crop

(krŏp)
n.
Zoology
a. A pouchlike enlargement of a bird's gullet in which food is partially digested or stored for regurgitation to nestlings.
b. A similar enlargement in the digestive tract of annelids and insects.

crop

  1. in vertebrates, particularly some birds, an expanded part of the oesophagus where food is stored.
  2. in invertebrates, an expansion of the anterior part of the gut system where food is either digested or stored.
  3. the agricultural or commercial fishery yield.
  4. in ecological terms, the difference between gross annual production and the net production - i.e. the material eaten by predators (or herbivores where the food is a vegetable), including that taken by man, and that consumed by organisms responsible for decay. See STANDING CROP.

crop

1. a saccular diverticulum of the esophagus just anterior to the entrance to the thorax. Present in all domestic birds.
2. domesticated plants sown and harvested for use by humans.
3. a cosmetic surgical procedure carried out on the ears of dogs of certain breeds. See ear cropping.

crop-bound
impaction of the crop in a bird.
crop-eared
small eared.
crop flush
1. treatment of a sick bird by a flushing out, with normal saline via an esophageal tube, of food and debris from the crop.
2. see also crop wash (below).
impacted crop
distention of the crop with undigested food.
crop milk
crumbly material, composed of lipid-laden, desquamated epithelial cells mixed with food, elaborated by both male and female pigeons in the crop and regurgitated to feed the nestlings.
pendulous crop
a condition of domesticated birds in which the crop becomes very distended and full of feed. Sporadic cases only, but there is an inherited predisposition to gross distention in turkeys. Called also impacted crop or crop bound.
crop residues
the remains of a crop after the commercially sought part of it has been harvested, e.g. wheat stubble, pea haulms, oaten straw.
crop wash
used in the differential diagnosis of trichomoniasis and candidiasis and to assess crop flora in birds with regurgitation and other signs referable to upper alimentary tract disease.
References in periodicals archive ?
Meelu and Rekhi (1983) and Bhordwaj et al (1981) also obtained similar results from green manuring in rice- wheat cropping system.
73 t/ha was produced by rice - wheat - sesbania cropping system followed by 3.
It is evident from the results that mungbean and cowpeas which are pulses as well as leguminous crops can be adjusted in the rice - wheat cropping system for increasing income per unit area and improving soil health.
Table 3: Crop yields under different rice - based cropping systems
Table 4: Economics and cost-benefit ratio of different rice based cropping systems
Economics and Cost Benefit Ratio (CBR): Economics of the rice-based cropping systems showed that the highest profit (Rs 85,012/-) was found in case of rice - lentil followed by rice - wheat - mungbean which gave Rs 82,671/- per hectare.
Types of intercropping include mixed intercropping and strip cropping.
Strip cropping is a polyculture strategy that involves growing crops in monocultures, in adjacent strips planted within a field.
Cover cropping is a type of multiple cropping system in which a crop is introduced during or following harvest of the cash crop.
The concepts of cover cropping and green manuring are linked because most cover crops can be incorporated as green manures.
A bird's eye view of agricultural landscapes shows that in many regions, cropping systems lack diversity.