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In integrated pest management, the economic threshold is the density of a pest at which a control treatment will provide an economic return. [1]An economic Injuryis the insect's population level or extent of crop damage at which the value of the crop destroyed exceeds the cost of controlling the pest. [2]
In climate engineering, the residue-to-product ratio (RPR) is used to calculate how much unused crop residue might be left after harvesting a particular crop. Also called the residue yield or straw/grain ratio, the equation takes the mass of residue divided by the mass of crop produced, and the result is dimensionless.
This is because an index is based on a geographical area within which farmers may have different experiences with, e.g., rainfall. As a consequence some farmers may achieve a good crop when most others in the area experience a crop failure. However, under an index-based system all farmers receive payouts.
Stress factors can affect growth, survival and crop yields. Plant stress research looks at the response of plants to limitations and excesses of the main abiotic factors (light, temperature, water and nutrients), and of other stress factors that are important in particular situations (e.g. pests, pathogens, or pollutants). Plant stress ...
the ratio of the area under sole cropping to the area under intercropping needed to give equal amounts of yield at the same management level. It is the sum of the fractions of the intercropped yields divided by the sole-crop yields.
Pieris brassicae caterpillars damaging a Brassica crop. Animals that commonly cause injury to plants include pests such as insects, mites, and nematodes.These variously bite or abrade plant parts such as leaves, stems, and roots, or as is common among the true bugs, pierce the plant's surface and suck plant juices.
Crop insurance is insurance purchased by agricultural producers and subsidized by a country's government to protect against either the loss of their crops due to natural disasters, such as hail, drought, and floods ("crop-yield insurance"), or the loss of revenue due to declines in the prices of agricultural commodities ("crop-revenue insurance").
Crop Revenue Coverage (CRC) is a form of revenue insurance that protects a producer's revenue for an insurable crop whenever low prices, low yields, or a combination of both causes revenue to fall below a guaranteed level selected by the producer.