crop

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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.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

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.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
References in periodicals archive ?
Agricultural crop residues (wheat straw and rapeseed) were collected from the field of Yanting agro ecological station of CAS, Sichuan Basin.
Where,[sup.15]Nrem% represents the percentage of [sup.15]N remaining in the residues and the soil,[sup.15]Nrem is the amount of [sup.15]N (mg [kg.sub.-1]) remaining in residues and in soil, and Nad the amount of [sup.15]N added with crop residues (mg [kg.sub.-1]).
This system comprises minimum to no-tillage and maintaining permanent and semi-permanent soil cover by crop residue retention.
Overall, farmers reported that burning of crop residues for the past sixteen years, ranging from five to thirty years.
The objective of this study therefore is to identify and quantify the various phosphorus species in leaf litters and crop residues from cocoa farms, oil palm, rubber, and banana plantations.
Nitrogen release during decomposition of crop residues under conventional and zero tillage.
There are several approaches to improve the nutritive value of crop residues for dairy cattle feeding including improved handling and processing to increase palatability, voluntary intake, and digestibility to release nutrients to animals.
The management of previous crop residues is the key to soil structural development and stability since organic matter is an important factor in soil aggregation (Verhulst et al., 2011).
He said Pakistani farmers are facing various challenges like shortage of irrigation water, soil degradation, changing prices of inputs, shortage of skilled farm labour, lack of suitable agricultural machinery, imbalance use of fertilizer and burning of crop residues.
Crop residues are an important source of soil organic matter vital for the sustainability of agricultural ecosystems.
More than 300 million dry tons of waste biomass, including animal manure, food processing waste, and crop residues, are generated every year from agricultural and food processing systems in the U.S.