Distribution of Soybean Roots, Soil Water, Phosphorus and Potassium Concentrations with Broadcast and Subsurface-Band Fertilization

2012 ◽  
Vol 76 (3) ◽  
pp. 1079-1089 ◽  
Author(s):  
Bhupinder S. Farmaha ◽  
Fabián G. Fernández ◽  
Emerson D. Nafziger
Keyword(s):  
Soil Water ◽  
Soybean Roots ◽  
Phosphorus And Potassium

Use of Soil, Water and Leaf Analyses in Growing Oranges in Jordan

1967 ◽  
Vol 3 (3) ◽  
pp. 215-221 ◽  
Author(s):  
R. F. Allbrook
Keyword(s):  
Soil Water ◽  
Irrigation Water ◽  
Chloride Content ◽  
Available Phosphorus ◽  
Jordan Valley ◽  
High Sodium ◽  
Leaf Analysis ◽  
Water Composition ◽  
Phosphorus And Potassium ◽  
Soil And Water

SummarySoil, water and leaf analyses were carried out on samples from irrigated orchards in the Jordan Valley. Analysis of the soil for available phosphorus and potassium gave meaningful results. Analysis of the irrigation water showed that a high sodium and chloride content caused an increase of these ions in the soil, which led to undesirable effects such as chlorosis. Irrigation water class C3–S1 should only be used if there is an annual precipitation of about 300 mm. Leaf analysis showed changes in the composition of leaves with age, but only potassium varied significantly between varieties. Standards of leaf, soil and water composition are suggested for the growing of citrus.

The Repressive Effect of Lime and Magnesia upon Soil and Subsoil Potash

1930 ◽  
Vol 20 (4) ◽  
pp. 499-510 ◽  
Author(s):  
W. H. MacIntire ◽  
W. M. Shaw ◽  
J. B. Young
Keyword(s):  
Soil Water ◽  
Standard English ◽  
Calcium Bicarbonate ◽  
Repressive Effect ◽  
Phosphorus And Potassium ◽  
Calcium Compounds

Standard English and American texts teach that liming effects a liberation of soil potash through ionic interchange. As examples we have the statement of Hall(8): “The action of lime upon potash compounds in the soil is equally marked: as the soil water carries down the dissolved calcium bicarbonate it attacks the zeolitic double silicates in the clay and some of their soluble bases, potash among them, change place with the lime and come into solution.” Similar statements, “One of the most important effects of calcium compounds is the conversion of insoluble into soluble forms of potassium…” by Van Slyke(25) and “but it also has some power to increase the solubility of phosphorus and potassium…” by Hopkins(9), have been accepted as authoritative.

scholarly journals Effect of soybean roots and a plough pan on the movement of soil water along a profile during rain

2019 ◽  
Vol 9 (5) ◽  
Author(s):  
Dong Wencai ◽  
Cai Fangfei ◽  
Fu Qiang ◽  
Cao Chengpeng ◽  
Meng Xue ◽  
...  
Keyword(s):  
Soil Water ◽  
Soybean Roots ◽  
Plough Pan

scholarly journals Impacts of Relative Elevation on Soil Nutrients and Apple Quality in the Hilly-Gully Region of the Loess Plateau, China

2021 ◽  
Vol 13 (3) ◽  
pp. 1293
Author(s):  
Lei Hua ◽  
Jianen Gao ◽  
Meifang Zhou ◽  
Shilun Bai
Keyword(s):  
Organic Matter ◽  
Soil Organic Matter ◽  
Soil Water ◽  
Soil Nutrients ◽  
Loess Plateau ◽  
Apple Orchards ◽  
The Loess Plateau ◽  
Phosphorus And Potassium ◽  
Apple Quality ◽  
The Impact

Relative elevation, as one of the decisive factors to the redistribution of soil water, nutrients, sunshine, and temperature in a region influences apple yield and quality by adjusting soil water and nutrients. To explore the impact of relative elevation on apple quality, this research investigated the conditions of soil moisture and nutrients at different elevations of terrace apple orchards in the hilly-gully region of the Loess Plateau. The results showed that soil water content decreases when the elevation increased, whereas soil nutrients fluctuated significantly at different elevations of terrace orchards and the contents were lower than the standard level of the Loess Plateau, especially soil organic matter, but total potassium was higher. The apple firmness increased when the elevation increased and had a good linear relationship with elevation. Apple vitamin C content in weed-covered orchards was higher than in the ploughing and weeding management orchards. The impact of soil nutrients, including soil water, nitrogen, phosphorus, and potassium on apple quality were concentrated in soluble solid and total acid. Irrational irrigation or partial use of nutrients, such as more use of nitrogen and less use of phosphorus and potassium, may deteriorate the apple quality. Therefore, we suggested that the amount of irrigation be increased appropriately with the raising of elevation. Moreover, part of the weed should be kept to cover the orchard, as well as mowing regularly and covering the surface. This would not only improve water use efficiency and increase soil organic matter content, it would also maintain apple quality and ensure sustainable development of the apple orchards.

Silicon in Plant Structure and Inorganic C-Sequestration

2019 ◽  
Vol 5 (02) ◽  
pp. 67-77
Author(s):  
Rajendra Prasad
Keyword(s):  
Soil Water ◽  
Human Population ◽  
C Sequestration ◽  
Vital Role ◽  
Heavy Elements ◽  
Plant Nutrient ◽  
Plant Structure ◽  
Large Herbivores ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

On the planet earth silicon is next only to oxygen in abundance. It is ubiquitous and is present in soil, water and air and biological systems from algae to human population. It is removed by crops in amounts larger than primary plant nutrients nitrogen, phosphorus and potassium and imparts several advantages to plants, such as, strength in straw in rice to prevent it from lodging and protection to crop plants against drought, salinity, toxicity of micronutrients and heavy elements, certain diseases, chewing insects and large herbivores yet it is not considered as an essential plant nutrient. However, Si is essential for diatoms and many other sea animals, which play a vital role in Si-cycle in the sea. Si helps in C-sequestration and plays an important role in maintaining the atmospheric CO2 low, but this fact is not well realized.

scholarly journals Physiology and Biochemistry of the Tobacco Plant. 1. Growth and Development - Physiologie und Biochemie der Tabakpflanze: 1. Wachstum und Entwicklung

1989 ◽  
Vol 14 (4) ◽  
pp. 197-209
Author(s):  
LP Bush ◽  
TC Tso
Keyword(s):  
Soil Water ◽  
Soil Nitrogen ◽  
Growth And Development ◽  
Dry Matter ◽  
Tobacco Plant ◽  
Growing Season ◽  
Dry Matter Accumulation ◽  
Nitrogenous Substances ◽  
Phosphorus And Potassium ◽  
Nitrogen Phosphorus

AbstractGrowth and development processes of a tobacco plant affect the chemical composition of the leaf and therefore the usability of the leaf. Growth starts with the initial stages of germination and development stops with the cured leaf. Most tobacco seed will germinate in the dark and the first seeds to germinate from a seed lot tend to produce larger plants for transplant and harvest. Nicotine is found in mature seed and increased rate of germination increases rate of nicotine accumulation in the young seedling. Carbon / nitrogen balance in the leaf is important for leaf usability and is influenced by available soil water and soil nitrogen. Oriental leaf is produced typically with limited water and nitrogen supply and the leaf contains large amounts of carbohydrates and ether solubles but small amounts of nitrogenous substances. Cigar filler tobacco is grown on soils with a plentiful supply of soil water and soil nitrogen and the leaf contains large amounts of nitrogenous substances. Intermediate to these tobacco types is flue-cured tobacco which is grown with limited soil nirogen but adequate water and the leaf is relatively thin with high carbohydrate content. Maximum rate of leaf expansion is achieved early in development of a leaf. In flue-cured tobacco phosphorus and potassium concentrations remain constant during growth, whereas nitrogen, calcium and magnesium concentrations decrease. In Oriental tobacco the concentrations of nitrogen, phosphorus, potassium and calcium decrease during the growing season. However, Burley tobacco accumulates relatively greater amounts of nitrogen, phosphorus and potassium during the first half of the growing season relative to dry matter accumulation. Maximum growth per unit leaf weight occurs 14 to 21 days after transplanting, whereas maximum dry matter accumulation per day occurs 50 to 55 days after transplanting. Leaf development including senescence is controlled genetically and decreased chlorophyll and protein and increased nicotine contents are important changes associated with leaf senescence. Maximum nicotine content of leaf occurs at successively higher stalk positions as the plant matures.

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