ISSN:0010-3624    

DOI:10.1080/00103627209366388

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor

摘要:

Maximum yields of red clover, alfalfa, and birdsfoot trefoil were obtained when 0.25 to 1.0 ppm B was added to the soil. An application of lime to raise the soil pH to 5.8–6.3 improved yields, while at pH 6.8 a decline in yield in the first and second cuts of birdsfoot trefoil was noted. There was a marked B x lime interaction on the yield of all cuts of birdsfoot trefoil and first cut of red clover, with much higher yields with high rates of lime at high rates of added B.

ISSN:0010-3624    

DOI:10.1080/00103627209366389

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor

摘要:

Objectives in this study were to measure total sugar and individual sugar content in whole, mature, soybeans of certain strains and to determine the stability of these components in strains grown over a wide geographical area. Soybean seed of three selected strains from each Maturity Group in the 1970 Uniform Tests‐Northern States were analyzed for total sugar, sucrose, raffinose and stachyose content. For Maturity Groups 00, 0, I, II, III and IV there were 10, 12, 23, 33, 27 and 24 locations, respectively. The locations were in 17 states and 2 Canadian provinces.

ISSN:0010-3624    

DOI:10.1080/00103627209366390

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor

摘要:

Changes in composition of five different ions in bush beans (Phaseolus vulgarisL. var. Improved Tendergreen) exposed for 40 hours to different experimental conditions were studied by means of emission spectrography. At 24°c newly absorbed Mg and Na tended to remain in roots; P and K tended to be somewhat equally distributed between root and shoot, and Ca tended to be transported to shoots. At 4°C absorbed Na was transported to shoots. The low temperature (cold shock) also caused a large net loss of K from plants including from the shoot. The pattern indicated circulation from shoot to root. To a lesser extent the same occurred for Mg.

ISSN:0010-3624    

DOI:10.1080/00103627209366391

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor

摘要:

A nutritional survey of 23 commercial peach orchards was carried out in the Murrumbidgee Irrigation Areas (M.I.A.) of New South Wales during three growing seasons (1961–62, 1962–63 and 1963–64). Sampling sites were chosen to provide the widest possible coverage of peach orchards of above average productivity. Leaf and soil samples were taken from each site for chemical analysis.

ISSN:0010-3624    

DOI:10.1080/00103627209366392

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor

摘要:

Commercial protease and cellulase treatment of dried and milled plant roots decreased their cation exchange capacity to varying degrees, indicating that protein and cellulose contribute to the exchange mechanism in addition to pectin. Membranes isolated from two roots proved to be epidermal cells; these had a significant cation exchange capacity when thought of as an interface between the soil and the root, but not when compared to the root as a whole. Methylation of the membranes reduced their exchange capacity to zero.

ISSN:0010-3624    

DOI:10.1080/00103627209366393

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor

摘要:

Methods are proposed for the determination of cadmium in soils, plants and fertilizers.

ISSN:0010-3624    

DOI:10.1080/00103627209366394

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor

摘要:

When plant tissues are analyzed, the interpretation of the mineral composition depends on all the dynamic factors of mineral uptake, distribution, redistribution, and interactions. Each of these factors must be viewed in the proper perspective to insure a valid interpretation of the nutrient requirements of plants.

ISSN:0010-3624    

DOI:10.1080/00103627209366395

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor

摘要:

The assumption of 2,000,000 kg/ha or 2,000,000 lbs/a in the conversion of soil test results into kg/ha and lbs/a introduces variables directly related to the variation in bulk density (BD) or volume weight (VW). In order to obtain enough soil to weigh 2,000,000 lbs/a the depth requirement changes with the VW. A soil with a VW of 1.6 g/cm3would require a depth of 5.5 inches, 7.9 inches with a VW of 1.0 and 20 inches with a VW of 0.44 g/cm3. A constant soil depth of 20 cm (7.9 inches) is proposed as a standard depth for calculation which in the metric system, corresponds to 2,000,000 dm3/ha. Details relating to the use of the 20 cm standard depth in the metric and U. S. and British systems of weights and measures are discussed.

ISSN:0010-3624    

DOI:10.1080/00103627209366396

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor

摘要:

An index system of reporting soil test results is suggested which is not confounded with the requirements of a particular crop but is based on each laboratory's evaluation of the test results in relation to the predicted relative sufficiency of each element in a fertile soil. It is suggested that soil test—fertilizer rate correlation adjustments begin after the fact rather than in a precursory manner to influence the results reported. A 0–100 index is proposed as a self explanatory measure and correlated with general crop response as follows: 0–15, nutrient deficiencies visible; 16–50, nutrient deficiencies obscured but plant response probable; 51–100, adequate nutrients available for most crops; 100+, amounts available in excess of present needs.

ISSN:0010-3624    

DOI:10.1080/00103627209366397

出版商:Taylor & Francis Group    

年代:1972

数据来源: Taylor