Results 271 to 280 of about 1,847,045 (311)

Using a Farmer's Beta for Improved Estimation of Actual Production History (APH) Yields [PDF]

, 2005
The effect of sampling error in estimation of farmers' mean yields for crop insurance purposes is explored using farm-level corn yield data in Iowa from 1990 to 2000 and Monte Carlo simulations. We find that sampling error combined with nonlinearities in the insurance indemnity function will result in empirically estimated crop insurance rates that ...
Carriquiry, Miguel, Babcock, Bruce, Hart, Chad   +2 more
openaire   +3 more sources

Some of the next articles are maybe not open access.

Related searches:

Predicted and Actual Yield and Nitrogen Concentration of Alfalfa in Different Nitrogen Environments

Crop Science, 1991
Glasshouse studies with alfalfa (Medicago sativa L.) have shown that improving both forage dry weight (DW) and N concentration (NC) requires selection under N2‐ and NH4NO3‐dependent conditions. The objectives of the present study were to (i) determine genetic variances of forage DW and NC in the field under different levels of N fertilization, (ii) use
L. R. Teuber, D. A. Phillips, S. Geng, W. F. Lehman   +3 more
openaire   +1 more source

Actual impacts of global warming on winter wheat yield in Eastern Himalayas

2016
Himalayas, are among the areas most vulnerable to global warming, however, little is knownabout warming impacts on the crops. Therefore, the actual affects of anticipated warming onwinter wheat were tested in Tibet, China. During the period 1988-2012, Tibet region hasexperienced a large increase in daily mean, minimum and maximum temperatures during ...
Zheng, Ch., Chen, Ch., Zhang, X., Song, Zh., Deng, A., Zhang, B., Wang, L., Mao, N., Zhang, W.   +8 more
openaire   +1 more source

Safety Factors and Reliability: Deterministic Actual Stress & Random Yield Stress

2004
In the previous chapter we studied the case in which the actual stress was treated as a random variable, while the yield stress was considered as a deterministic quantity. In this report we investigate the reverse case, namely, when the actual stress is deterministic, while the yield stress is treated as a random variable. Various probability densities
openaire   +1 more source

Safety Factors and Reliability: Random Actual Stress & Deterministic Yield Stress

2004
In this chapter we will deal with the simplest possible case, when the yield stress constitutes a deterministic quantity but the actual stress is random, due to the randomness of the distribution or concentrated loads, or the randomness of distributed or the concentrated moments.
openaire   +1 more source

Stochasticity and safety factors: Part 1. Random actual stress and deterministic yield stress

Chaos, Solitons & Fractals, 2005
Abstract This paper makes a bridge between the classical concept of the safety factor and the structural reliability. It concentrates on a special case in which the material possesses deterministic yield stress, and the element is subjected to the random actual stress.
openaire   +1 more source

Safety Factor and Reliability: Both Actual Stress and Yield Stress Are Random

2004
In this chapter both stress and strength are treated as random variables. Thus, this is the most general case within the context of random variables theory. The connection between the reliability and safety factors will be demonstrated for various possible distributions.
openaire   +1 more source

Soybean transpiration, vegetative morphology, and yield components following simulated and actual insect defoliation

2018
Soybean water-loss following defoliation was investigated in two ex­ perimental systems, excised leaves and field-grown potted plants. Tran­ spiration from excised leaves increased following defoliation as a linear function of cut edge per leaf. In contrast, transpiration from soybean canopies decreased following defoliation by two lepidopteran ...
openaire   +1 more source

An optical trapezoid model for actual evapotranspiration and winter wheat yield estimation

2023
A. Mokhtari, M. Sadeghi, Y. Afrasiabian, K. Yu   +3 more
openaire   +1 more source

Colonoscopies for patients aged 45–49 years yield positive results

Ca-A Cancer Journal for Clinicians, 2022
exaly