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Economic value of insect pollination services in U.S. much higher than thought, study finds（图）
Economic value insect pollination services U.S
2021/3/5
The economic value of insect pollinators is much higher than previously thought, according to researchers at the University of Pittsburgh and Penn State University. The team also found that ...
Monumental trees and their existence value: the case study of an Italian natural park
Contingent Valuation Method Giant hollies Parks, Sicily Willingness To Pay
2015/5/6
This paper aims to the valuation of the benefits that a local community living in a protected area may perceive with regard to the presence of monumental trees. Financial resources to be destined for ...
FORECROP VALUE OF NARROW-LEAF LUPIN AND SPRING BARLEY FOR WINTER WHEAT DEPENDING ON THE WEED KILING IN THE FIELD
winter wheat forecrops dose of herbicide soil tillage weeds
2009/3/31
In a three-year field experiment carried out at Mochełek in the vicinity of Bydgoszcz on good rye complex soil over 2003-2005 there were evaluated an effect of the forecrop, a varied soil tillage...
EFFECT OF SOIL TILLAGE SYSTEMS AND HERBICIDES ON CONSUMPTIon VALUE OF POTATO TUBERS OF WIKING CULTIVAR
consumption value herbicides potato tillage systems
2009/3/31
The field experiment was conducted over 2002-2004 on the Experimental Farm at Zawady, on the soil made of light loamy sand to heavy loamy sand, representing a very good rye complex soil. The factors ...
Estimating the threshold value and loss distribution：Rice damaged by typhoons in Taiwan
Natural disasters generalized Pareto distribution heavy-tailed distribution threshold value
2009/3/4
We apply extreme value theory to determine the over-threshold peaks of the data and then use the Kolmogorv-Smirnov and Anderson-Darling goodness of fit tests to show that the generalized Pareto ...
The effect of pests on the yield and economical value of cereals
pests the yield and economical value cereals
2010/1/14
The effect of pests on the yield and economical value of cereals.