UPTAKE OF NITROGEN BY WHEAT, AND PHOSPHORUS BY ALFALFA, FROM SOME GRASSLAND SOILS OF SOUTHERN ALBERTA

1964 ◽  
Vol 44 (3) ◽  
pp. 304-309 ◽  
Author(s):  
K. K. Krogman ◽  
L. E. Lutwick
Keyword(s):  
Nitrogen Uptake ◽  
Classification System ◽  
Soil Phosphorus ◽  
Phosphorus Uptake ◽  
Soil Classification ◽  
Phosphorus Fertilizer ◽  
Grassland Soils ◽  
Southern Alberta ◽  
Extractable Soil

The uptake of nitrogen by wheat and of phosphorus by alfalfa grown in the greenhouse on 16 A-horizon soils was correlated with the soils separated according to the Canadian soil classification system. Uptakes of both elements were greater from the Chernozemic than from the Solonetzic soils. Within the Solonetzic Order, uptakes were greater from the Solodized-Solonetz than from the Solod soils. Within the Chernozemic Order, nitrogen uptake was greater from the Black soils than from the Brown or Dark Brown soils, whereas phosphorus uptake was greater from the Dark Brown soils than from the Black or Brown soils. Phosphorus uptake and response to phosphorus fertilizer were closely correlated with NaHCO3-extractable soil phosphorus.

Sugarcane Biomass Yield Response to Phosphorus Fertilizer on Four Mineral Soils as Related to Extractable Soil Phosphorus

2019 ◽  
Vol 50 (22) ◽  
pp. 2960-2970 ◽  
Author(s):  
Joaquin S. Alvarado ◽  
J. Mabry McCray ◽  
John E. Erickson ◽  
Hardev S. Sandhu ◽  
Jehangir H. Bhadha
Keyword(s):  
Biomass Yield ◽  
Soil Phosphorus ◽  
Yield Response ◽  
Phosphorus Fertilizer ◽  
Mineral Soils ◽  
Extractable Soil

PHOSPHORUS AVAILABILITY AS AFFECTED BY THE APPLICATION OF PHOSPHATE ROCK COMBINED WITH ORGANIC MATERIALS TO ACID SOILS IN WESTERN KENYA

2003 ◽  
Vol 39 (4) ◽  
pp. 395-407 ◽  
Author(s):  
M. W. WAIGWA ◽  
C. O. OTHIENO ◽  
J. R. OKALEBO
Keyword(s):  
Rock Phosphate ◽  
Field Experiments ◽  
Organic Materials ◽  
Soil Phosphorus ◽  
Phosphorus Uptake ◽  
Water Soluble ◽  
Phosphate Rocks ◽  
Western Kenya ◽  
Triple Super Phosphate ◽  
Extractable Soil

Most of the agricultural lands in the highlands of western Kenya are depleted of plant nutrients, particularly phosphorus. This depletion has resulted in a continued decline in crop production in the area. Recent experiments, in which direct application of indigenous phosphate rocks were evaluated, have yielded variable results, depending on the relative reactivity of the rock phosphate tested. The effectiveness of rock phosphate was generally low compared with fertilizers such as triple super phosphate. This is attributed to the relatively low solubility of the rocks as opposed to the readily water soluble phosphorus fertilizers. Phosphate rocks are available locally and are cheaper than triple super phosphate. If the solubility of these phosphate rocks could be improved, the resource-poor smallholder farmers in western Kenya would have an affordable source of phosphorus for their crops. Greenhouse and field experiments were conducted to evaluate the effects of combining different on-farm organic materials with the Minjingu rock phosphate (from Tanzania) on the availability of phosphorus to maize (Zea mays) in western Kenya. The greenhouse results indicated that there were significant positive linear relationships between rock phosphate application rates and (i) the Olsen-extractable soil phosphorus in the soil samples taken four weeks and nine weeks respectively after the application of the treatments; (ii) the dry matter yield, and (iii) phosphorus uptake. Results of the field experiments showed that rock phosphate combined with farmyard manure or crop residues (maize stover) generally increased the Olsen-extractable soil phosphorus, maize yields and phosphorus uptake, particularly in the first season when both the Minjingu rock phosphate and organic materials were applied, but the effectiveness of the materials and their combinations varied between the two sites. Combining Minjingu rock phosphate with the organic materials improved its relative agronomic effectiveness for maize.

scholarly journals THE AVAILABILITY TO ALFALFA OF PHOSPHORUS FROM TWELVE DIFFERENT CARRIERS

1959 ◽  
Vol 39 (1) ◽  
pp. 54-63 ◽  
Author(s):  
J. D. Beaton ◽  
K. F. Nielsen
Keyword(s):  
Total Phosphorus ◽  
Sandy Loam ◽  
Soil Phosphorus ◽  
Phosphorus Uptake ◽  
Ammonium Phosphate ◽  
Monocalcium Phosphate ◽  
High Base ◽  
Highly Correlated ◽  
Extractable Soil ◽  
Phosphorus Levels

Availabilities of the phosphorus in twelve different phosphate sources to alfalfa were determined in a growth chamber. Two crops of alfalfa were grown on two soils of high base status, Machete stony sandy loam and Westwold loam. Fertilizer materials containing monocalcium phosphate or materials such as calcium metaphosphate which are converted to monocalcium phosphate brought about the greatest increases in yield. However, yield increases also resulted from treatments with the ammonium phosphates and orthophosphoric acid. Ammonium phosphate fertilizers were the most effective in increasing the percentage of phosphorus present in the alfalfa tissue. Ammonium phosphate and monocalcium phosphate materials were equally effective in increasing total phosphorus uptake by alfalfa. The amount of CO2 soluble phosphorus extracted from the Westwold loam, following treatment with the various phosphate sources, was correlated with the yield of the first crop of alfalfa. The average per cent P in the alfalfa tissue was found to be correlated with the CO2 soluble P. Both the NaHCO3 and CO2 extractable soil phosphorus levels of the Westwold loam, after it had been treated with the different phosphate materials, were found to be highly correlated with the phosphorus uptake by the second crop of alfalfa and with the total phosphorus uptake.

Studies on soil phosphorus III. Phosphorus fractionation as a fertility index in South Australian soils

1950 ◽  
Vol 40 (3) ◽  
pp. 257-262 ◽  
Author(s):  
Colin H. Williams
Keyword(s):  
Acetic Acid ◽  
Field Experiments ◽  
Phosphorus Content ◽  
Organic Phosphorus ◽  
Soil Phosphorus ◽  
Phosphorus Uptake ◽  
Phosphorus Fractionation ◽  
Fertility Index ◽  
Pot Culture ◽  
Extractable Soil

A simplification of Ghani's method for the fractionation of soil phosphorus has been used to study relationships between soil and plant phosphorus in field and pot-culture experiments.In pot-culture experiments with red-brown earth soils (pH 5·6–6·1) wheat derived approximately 60% of its phosphorus from the fraction of soil phosphorus soluble in 2·5% acetic acid-1% 8-hydroxyquinoline and 30% from the inorganic fraction soluble in 0·1 n-sodium hydroxide, even although the amount of acetic acid soluble phosphorus present in these soils was only about half that present as inorganic alkali soluble. Very little use was made of organic phosphorus.In field experiments with similar soils there was a correlation between the percentage phosphorus in the plant material and the acetic acid soluble, the inorganic alkali soluble, and the sura of these two fractions of soil phosphorus. The sum of these two fractions was also correlated with the amount of phosphorus taken up by the crop.In pot-culture experiments with a wider range of soil types there was good correlation between the total extractable inorganic soil phosphorus and both the phosphorus content of the plant and the phosphorus uptake. Correlations between individual inorganic extractable soil phosphorus fractions and plant phosphorus were influenced by the pH of the two groups of soils examined.

Ecological niches of major soil types in Russia: Geographical aspects of the new Russian soil classification system

2009 ◽  
Vol 42 (9) ◽  
pp. 967-975 ◽  
Author(s):  
V. D. Tonkonogov ◽  
I. I. Lebedeva ◽  
M. I. Gerasimova ◽  
S. F. Khokhlov
Keyword(s):  
Classification System ◽  
Soil Classification ◽  
Soil Types ◽  
Ecological Niches ◽  
Russian Soil

Computerized Cone Penetration Test for Soil Classification

2008 ◽  
Vol 2053 (1) ◽  
pp. 47-64 ◽  
Author(s):  
Murad Y. Abu-Farsakh ◽  
Zhongjie Zhang ◽  
Mehmet Tumay ◽  
Mark Morvant
Keyword(s):  
Classification System ◽  
Soil Classification ◽  
Cone Penetration Test ◽  
Classification Systems ◽  
Fuzzy Classification ◽  
Classification Methods ◽  
Penetration Test ◽  
Cone Penetration ◽  
Cone Tip Resistance ◽  
Tip Resistance

Computerized MS-Windows Visual Basic software of a cone penetration test (CPT) for soil classification was developed as part of an extensive effort to facilitate the implementation of CPT technology in many geotechnical engineering applications. Five CPT soil engineering classification systems were implemented as a handy, user-friendly, software tool for geotechnical engineers. In the probabilistic region estimation and fuzzy classification methods, a conformal transformation is first applied to determine the profile of soil classification index (U) with depth from cone tip resistance (qc) and friction ratio (Rf). A statistical correlation was established in the probabilistic region estimation method between the U index and the compositional soil type given by the Unified Soil Classification System. Conversely, the CPT fuzzy classification emphasizes the certainty of soil behavior. The Schmertmann and Douglas and Olsen methods provide soil classification charts based on cone tip resistance and friction ratio. However, Robertson et al. proposed a three-dimensional classification system that is presented in two charts: one chart uses corrected tip resistance (qt) and friction ratio (Rf); the other chart uses qt and pore pressure parameter (Bq) as input data. Five sites in Louisiana were selected for this study. For each site, CPT tests and the corresponding soil boring results were correlated. The soil classification results obtained using the five different CPT soil classification methods were compared.

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