Results 251 to 260 of about 1,935,089 (298)
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Journal of Soil Science, 1964
Summary The method of determining the activity ratio image (AR) described by Beckett in Part II of this series was applied to a range of moderately to intensely acid Nigerian soils ...
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Summary The method of determining the activity ratio image (AR) described by Beckett in Part II of this series was applied to a range of moderately to intensely acid Nigerian soils ...
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Soil Science Society of America Journal, 1970
Abstract Displacement of potassium in soil by a solution of calcium sulphate is considered. The basic assumptions are the existence of a state of microscopic equilibrium and neglecting dispersion. A model is developed and computed.
Y. Avnimelech, Vera Shaham, Adina Feder
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Abstract Displacement of potassium in soil by a solution of calcium sulphate is considered. The basic assumptions are the existence of a state of microscopic equilibrium and neglecting dispersion. A model is developed and computed.
Y. Avnimelech, Vera Shaham, Adina Feder
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2021
Potassium evaluation in soils resembles to other mineral nutrients and principally any approach can be followed depending on time and available resources. In addition to crop response to potash fertilization, there are three distinct evaluation methods, namely visual observations of plants, soil testing, and plant–tissue analysis which can be base line
Abdul Wakeel, Muhammad Ishfaq
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Potassium evaluation in soils resembles to other mineral nutrients and principally any approach can be followed depending on time and available resources. In addition to crop response to potash fertilization, there are three distinct evaluation methods, namely visual observations of plants, soil testing, and plant–tissue analysis which can be base line
Abdul Wakeel, Muhammad Ishfaq
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Plant and Soil, 1966
The Quantity-Intensity relations of labile K in soil relate the intensity (or availability) of labile K to the amount of labile K present. Several soils have been depleted of K by crops, and enriched or depleted of K by other means. Theforms of the Q/I relations for labile K in these soils are almost unaffected by K-depletion, by the fixation of added ...
P. H. T. Beckett +3 more
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The Quantity-Intensity relations of labile K in soil relate the intensity (or availability) of labile K to the amount of labile K present. Several soils have been depleted of K by crops, and enriched or depleted of K by other means. Theforms of the Q/I relations for labile K in these soils are almost unaffected by K-depletion, by the fixation of added ...
P. H. T. Beckett +3 more
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Interaction of Ammonium and Potassium in a Potassium‐Fixing Soil
Soil Science Society of America Journal, 1967Abstract Different levels of NH 4 and K were supplied to a K‐fixing soil (Buxton silt loam) containing the nitrification inhibitor 2‐chloro‐6‐(trichloromethyl) pyridine.
R. J. Bartlett, T. J. Simpson
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Soil Science Society of America Journal, 1959
Abstract A comparison was made of different extractants for determining the increase in exchangeable soil K which occurs on drying the soils. Moist and dry surface and subsoil samples of 10 Iowa soil profiles were used. The amount of K released on drying as determined by the different extractants was in the order:
J. J. Hanway, A. D. Scott
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Abstract A comparison was made of different extractants for determining the increase in exchangeable soil K which occurs on drying the soils. Moist and dry surface and subsoil samples of 10 Iowa soil profiles were used. The amount of K released on drying as determined by the different extractants was in the order:
J. J. Hanway, A. D. Scott
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The soil potassium resources and the efficiency of potassium fertilizers in Croatia
1997Agricultural land capacity in Croatia is 3, 208 mill. ha. Of this, there are 2, 02 mill. of cultivable land, 1, 446 mill. ha of arable land and gardens, 71000 ha of vineyards, 70, 000 ha of orchards, 310, 000 ha of meadows and 1, 155 mill. ha of pasture lands. Ponds, marsh-lands and fisheries take up 33, 000 ha.
Kovačević, Vladimir, Bašić, Ferdo
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Potassium Uptake by Corn and Soybean, Recycling to Soil, and Impact on Soil Test Potassium
Soil Science Society of America Journal, 2014Research is needed to quantify better plant nutrients recycling to the soil. This study investigated K recycling by corn (Zea mays L.) and soybean [Glycine max (L.) Merr.] from physiological maturity (PM) to spring. Aboveground plant samples were collected from 19 Iowa K field response trials (33 sites years for corn and 14 for soybean). Dry matter (DM)
Ryan R. Oltmans, Antonio P. Mallarino
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Soil Science Society of America Journal, 1969
Abstract Significance of K selectivity by soils, as revealed by the Gapon exchange selectivity coefficient, in improving exchangeable K as an availability index was tested on 12 UAR alluvial and desert soils under the high intensity cropping of a Neubauer experiment.
A. I. Rezk, Fathi Amer
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Abstract Significance of K selectivity by soils, as revealed by the Gapon exchange selectivity coefficient, in improving exchangeable K as an availability index was tested on 12 UAR alluvial and desert soils under the high intensity cropping of a Neubauer experiment.
A. I. Rezk, Fathi Amer
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1987
The study of potassium (K) exchange on clay minerals and soils can be viewed from either a thermodynamic or a kinetic perspective. In pursuing the soil science literature, one will undoubtedly find that most of the studies on K exchange have been of an equilibrial rather than of a dynamic nature.
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The study of potassium (K) exchange on clay minerals and soils can be viewed from either a thermodynamic or a kinetic perspective. In pursuing the soil science literature, one will undoubtedly find that most of the studies on K exchange have been of an equilibrial rather than of a dynamic nature.
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