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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.
The most significant factor is the ratio of the surface area of the fruit or vegetable to its volume. The greater the ratio the more rapid will be the loss of water. The rate of loss is related to the difference between the water vapour pressure inside the produce and in the air. Produce must therefore be kept in a moist atmosphere. [8]
Agriculture in Singapore is a small industry, composing about 0.5% of the total GDP, within the city-state of Singapore. Singapore's reliance on imports for about 90% of its food underscores the paramount importance of food security. To address this, Singapore has set a goal to produce 30% of its nutritional needs locally by 2030. [1]
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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]
CropSyst, a multi-year multi-crop daily time-step crop simulation model developed by a team at Washington State University's Department of Biological Systems Engineering. [ 4 ] DSSAT , the Decision Support System for Agro-technology Transfer, is a multi-crop, multi-year crop simulation model which evolved from the IBSNAT (1982-1993) and ICASA ...
Since the founding of Singapore in 1819, more than 95% of its estimated 590 square km of vegetation has been cleared. At first for short-term cash crops and later because of urbanization and industrialization. 61 of its original 91 bird species has been lost leading to many native forest plants not being able to reproduce because of loss of seed dispersal and pollination.
Singapore Airlines Ltd on Thursday reported its first-ever annual loss, citing poor fuel hedging bets and the collapse in demand driven by the coronavirus pandemic, and said the timing of any ...