Zobrazeno 1 - 10
of 17
pro vyhledávání: '"T. W. Sammis"'
Publikováno v:
Soil Science Society of America Journal. 72:758-766
Low soil O 2 levels have been shown to limit growth in pecan [Carya illinoinensis (Wangenh.) K. Koch] seedlings and may limit yield in mature trees. To assess changes in the gas-phase O 2 concentration in a pecan orchard soil in response to flood irr
Publikováno v:
Journal of Natural Resources and Life Sciences Education. 25:131-136
Autor:
T. W. Sammis, J. G. Mexal
Publikováno v:
Journal of Natural Resources and Life Sciences Education. 25:58-61
Agricultural students learn to conduct research by working with accomplished researchers as mentors. Because of time limitations between a student and professor a formal class was initiated that teaches the skills needed to be a successful future sci
Publikováno v:
Applied Engineering in Agriculture. 10:41-44
Automated weather collection systems are replacing climate instruments read by a person. However, data-loggers fail and data has to be estimated from adjacent climate stations. This article compares two linear regression methods for replacing data th
Autor:
D. Jernigan, T. W. Sammis
Publikováno v:
Applied Engineering in Agriculture. 8:191-195
Water requirements were determined for eighteen species of ornamental plants produced under non-limiting water conditions at Las Cruces, New Mexico. Baseline equations were determined from regression analysis of canopy-air temperature differential ve
Autor:
T. W. Sammis, M. H. Ames
Publikováno v:
Applied Engineering in Agriculture. 6:607-610
Regression analysis is a versatile and powerful statistical tool for describing relations among variables. An example is the development of water production functions that relate water applied or evapotranspiration to crop yield. The widespread use o
Publikováno v:
Applied Engineering in Agriculture. 17
Groundwater contamination caused by nitrate–nitrogen (NO3 – –N) leaching through soils is becoming a serious problem in the irrigated Mesilla Valley of southern New Mexico. The greatest groundwater contamination probably results from large amou
Autor:
M. K. Shukla, T. W. Sammis
Publikováno v:
Soil Science Society of America Journal. 70:708-708
Autor:
J. Ben-Asher, T. W. Sammis
Publikováno v:
Agronomy Journal. 70:568-572
Publikováno v:
Transactions of the ASAE. 22:0791-0796
SALT content was measured in plots watered by sprin-kler, subsurface, trickle, and furrow irrigation with groundwater having an electrical conductivity of 1.22 mmhos/cm. The plot treatments consisted of irrigating when the soil water potential at 15