Showing 1 - 10 of 324,683
In many regions of the U.S., low dissolved oxygen (DO) is a common freshwater impairment. States, territories, and tribes of the U.S. are required by federal law to develop Total Maximum Daily Loads (TMDLs) for waters not meeting established DO standards. Regulators and other professionals are...
Persistent link: https://www.econbiz.de/10009429562
Systematic sampling is easy, efficient, and widely used, though it is not generally recognized that a systematic sample … of them determine which estimators are unbiased, when using the sampling design as the basis for inference. We describe … selection. When the population size is known at the outset, systematic sampling with unrestricted selection is most likely the …
Persistent link: https://www.econbiz.de/10009429445
The impact of livestock grazing on water quality, especially erosion and sedimentation, is an important concern in the southwestern United States. In response to Federal and State regulations, Best Management Practices (BMPs) for rangeland management are being developed and implemented in many...
Persistent link: https://www.econbiz.de/10009429464
Persistent link: https://www.econbiz.de/10011938678
Purpose - The purpose of this paper is to use the DuPont expansion to examine those factors underlying differences in (rates of) return on different crop portfolios over space (ten regions) and time (1960-2004). The paper also estimates the impact of government payments on farmland values...
Persistent link: https://www.econbiz.de/10009429430
Persistent link: https://www.econbiz.de/10011274260
Persistent link: https://www.econbiz.de/10011274330
and the regulatory environment are controlled for and are robust to different methodologies, different sampling periods …
Persistent link: https://www.econbiz.de/10005825680
Persistent link: https://www.econbiz.de/10011274174
Persistent link: https://www.econbiz.de/10009132079