Timothy (Phleum pratense L.) is an important forage crop in many Western U.S. states. Marketing of timothy hay is primarily based on esthetics, and green color is an important attribute. The objective of these studies was to determine a relationship between arthropod populations, yield, and esthetic injury in timothy. Economic injury levels (EILs) and economic thresholds were calculated based o...

EVERY sugarcane grower would like the best levels of performance for all traits, such as high cane yield, high sugar content, resistance or tolerance to biotic and abiotic stress, and every other desirable attribute, all combined together into the same variety. In the real world, however, almost all the important crop traits vary continuously and mostly independently, in genetic populations gen...

Abstract We study the impact of economic policy uncertainty on term structure nominal interest rates. In a general equilibrium model populated by an averse agent, we show that political not only affects yield curve and corresponding volatility but also bond risk premia carry premium for uncertainty. Our simultaneously captures both shape hump volatilities, stylized feature is hard to match with...

【Objective】 In order to quantify the yield formation of protected tomato, 【Method】 the field experiments on varieties and fertilizer were conducted in 2009 and 2010, and cultivars: (B1) American mole 1 (early maturing), (B2) Chaoshijifanqiedawang (late maturing), and (B3) American 903 (medium maturing) were adopted; The models of dry matter production and yield formation for protected tomato we...

in order to investigate the effect of organic and chemical fertilizers on growth characteristics of marjoram, a factorial experiment was conducted based on randomized complete block design with three replications at the agricultural research station, ferdowsi university of mashhad during 2012-2013 growing season. treatments were comprised of four urea levels (0, 21.7, 108.7 and 195.7 kg.ha-1) a...

The reactive-power service will be or is already obligatory for new grid-connected photovoltaic systems. The paper investigates the impact of the reactive-power service on the energy yield of a photovoltaic system and its effect on the inverter sizing and economic yield. Based on simulations and analysis of an operating photovoltaic system we show that energy losses due to the reactive-power se...

There is a significant amount of empirical evidence to suggest that the yield curve is useful for forecasting inflation, recessions, and possibly even the growth rate of real output. This essay considers the theoretical reasons why the yield curve may have these predictive properties. It is found that the essential reason why the yield curve predicts inflation and recessions is that it, through...

Economists have long argued that a fishery that maximizes its economic potential usually will also satisfy its conservation objectives. Recently, maximum economic yield (MEY) has been identified as a primary management objective for Australian fisheries and is under consideration elsewhere. However, first attempts at estimating MEY as an actual management target for a real fishery (rather than ...

Research project entitled “Yield and economic dynamics of intercropping in summer vegetables ” was conducted at Horticultural Research Farm, NWFP Agricultural University, Peshawar (Pakistan) during 1999 and 2000. Summer vegetables were evaluated alone and in various combinations for their yield, land equivalent ratio and income in intercrop combinations. Each plot was 4x4 m whereas number of ro...