全部文献期刊学位论文会议报纸专利标准年鉴图书|学者科研项目
中外文文献  中文文献  外文文献
作者:R. H. Fox , W. P. Piekielek
来源:[J].Communications in Soil Science and Plant Analysis(IF 0.42), 1984, Vol.15 (2), pp.109-123Taylor & Francis
摘要:The exchangeable soil Mg level recommended for agronomic crop production by different soil testing services ranges from 25 to over 180 ppm (?10% saturation of the cation exchange capacity). In some cases the justification for high soil Mg recommendations is to ensure that forage ...
作者:R. H. Fox , W. P. Piekielek , K. M. Macneal
来源:[J].Communications in Soil Science and Plant Analysis(IF 0.42), 1994, Vol.25 (3-4), pp.171-181Taylor & Francis
摘要:Although it has been shown that the nitrogen (N) concentration of winter wheat (Triticum aestivum L. em Thell) at Feeke's growth stage 5 (GS 5) can be used to assist in making more accurate spring N fertilizer recommendations, the need remains to find a more convenient and accura...
作者:R. H. Fox
来源:[J].Communications in Soil Science and Plant Analysis(IF 0.42), 1978, Vol.9 (1), pp.13-37Taylor & Francis
摘要:A total of seventy-three U.S. corn (Zea mays L.) inbreds and hybrids were grown in the greenhouse for two to four weeks in low and high available P nutrient solutions and soils to select for phosphorus efficiency based on yield differences in a low available P medium. Variation i...
作者:R. H. Fox
来源:[J].Communications in Soil Science and Plant Analysis(IF 0.42), 1980, Vol.11 (1), pp.57-69Taylor & Francis
摘要:Two new double-buffer methods have been proposed recently by Yuan and McLean, et al. to more accurately predict the lime requirement (L.R.) in sandy, low buffer capacity soils and in low L.R. soils respectively. The L.R. of 20 typical acid agricultural soils in Pennsylvania were ...
作者:R. H. Fox , V. A. Bandel
来源:[J].Communications in Soil Science and Plant Analysis(IF 0.42), 1989, Vol.20 (19-20), pp.1957-1968Taylor & Francis
摘要:Numerous experiments have been conducted in Maryland and Pennsylvania since 1981 to determine if adding the nitrification inhibitor dicyandiamide (DCD) to an ammonium-containing or producing N fertilizer source would increase the efficiency of that source with turfgrass, wheat, o...
作者:R. H. Fox
来源:[J].Ergonomics(IF 1.674), 1960, Vol.3 (4), pp.307-313Taylor & Francis
摘要:This paper briefly reviews certain aspects of man's response on exposure to a hot climate. The value of applying the concepts of thermal exchange analysis to evaluate the severity of a particular heat stress situation is emphasised. The possible effects of the Rome climate on a m...
作者:B. P. Michrina , R. H. Fox , W. P. Piekielek
来源:[J].Communications in Soil Science and Plant Analysis(IF 0.42), 1981, Vol.12 (6), pp.519-535Taylor & Francis
摘要:In the past, greenhouse and field results have been used individually to test the predictive capacity of laboratory indexes of soil nitrogen availability. The field results are the most reliable measure of field available N, but greenhouse experiments can be conducted more easily...
作者:K. V. Iversen , R. H. Fox , W. P. Piekielek
来源:[J].Communications in Soil Science and Plant Analysis(IF 0.42), 1985, Vol.16 (8), pp.837-852Taylor & Francis
摘要:Significant correlations have been found between the nitrate concentration in young corn (Zea mays L.) stalks and available soi 1 N and relative grain yield when N availability is a yield limiting factor. To successfully use nitrate tissue testing as an indicator of the N status ...
作者:J. M. Jemison , R. H. Fox
来源:[J].Communications in Soil Science and Plant Analysis(IF 0.42), 1988, Vol.19 (14), pp.1569-1582Taylor & Francis
摘要:Development of a nitrate quick-test for use by fanners or field consultants would likely encourage the use of plant tissue and soil nitrate tests as a means to improve nitrogen management. To evaluate a quick-test method, nitrate concentrations in plant tissue and soils were meas...
作者:R. H. Fox , J. D. Toth
来源:[J].Communications in Soil Science and Plant Analysis(IF 0.42), 1991, Vol.22 (3-4), pp.191-200Taylor & Francis
摘要:A soil nitrate test taken about 4 weeks after emergence has been proposed to predict the corn (Zea mays L.) yield reponse to sidedress N fertilizer applications. Use of this test would be increased if the soil analysis and interpretation could be done rapidly, since the fertilize...

我们正在为您处理中,这可能需要一些时间,请稍等。

资源合作:cnki.scholar@cnki.net, +86-10-82896619   意见反馈:scholar@cnki.net

×