Showing papers on "Potassium nitrate published in 1968"

Temporal changes in carboxylate content of ryegrass with stepwise change in nutrition

Abstract: A detailed scheme of carboxylate formation and retention by plant tissues as a result of ion uptake and utilization is given. By means of discontinuities in the supply with nutrient ions, carboxylate retention by the tissues of perennial ryegrass was followed as a function of growth. It was found that translocation of potassium nitrate to the shoot and subsequent nitrate metabolism was the only process capable of supplying the shoot with sufficient carboxylates and of removing the excess from the foliage to the root system with maintenance of the normal carboxylate content. Absorbed bicarbonate was a good source of carboxylates in the roots, but the rate of translocation to the plant tops was too slow relative to growth. Therefore, the carboxylate concentration in the foliage fell progressively to one half the normal value. Constancy of carboxylate concentration in the dry matter was related to the early establishment of the proportion of carboxylates to dry material in the new growth, making it independent of subsequent changes in water content of the tissues. Changes in carboxylate concentrations due to changes in the supply were continuous with time. Nitrate caused a depression in the roots during nitrate accumulation, but the nitrate metabolism in the follage made sufficient carboxylates available for replenishment and maintenance of their normal level in the whole plant.

New 2-pyridyl polyamines. Synthesis, spectra, and proton dissociation constants

Abstract: The synthesis of di-(2-pyridylmethyl)amine, 2-aminoethyl-(2-pyridylmethyl)amine, di-(2-2′-pyridylethyl)amine, 3-aminopropyl-(2-2′-pyridylethyl)amine, 2-2′-pyridylethyl-(2-pyridylmethyl)amine, and 3-aminopropyl-(2-pyridylmethyl)amine is described. Their infrared and n.m.r. spectral characteristics are described, and their trihydrochlorides and dipicrates have been prepared. The three proton dissociation constants have been rigorously determined in each case by potentiometric titration at 25° and µ 0·10 in potassium nitrate.

Effects of nitrogenous materials on translocation and stump exudation in root systems of tomato

Abstract: An application of urea or of potassium nitrate to potted tomato plants in the 11- to 18-leaf stage of growth increased markedly the quantity of solutes in the stump exudate for the next 48 to 72 hours This increase of solutes was most pronounced during the maximum part of the diurnal rhythmic cycle A large proportion of the increased quantity of solutes was composed of asparagine, glutamine, aspartic acid, glutamic acid, nitrate, ammonium, etc and thus directly related to the metabolism of the applied nitrogen In addition, however, increased quantities of phosphorus and, at certain times, of potassium were notedIn detopped tomato plants the increased transfer of solutes from the treatment with nitrogenous materials increased the maximum rate of stump exudation from 2 ml/(plant × hour) for water control plants to 8 ml/(plant × hour) Single plants produced 80 ml of stump exudate in 24 hours The time course effect on rate of exudation by the two forms of nitrogen differed in that potassium nitrate pro

Method for making a tobacco substitute composition

Abstract: A method of making a tobacco substitute material is disclosed which involves the use of fibrous woodpulp which contains at least 90 percent of alpha cellulose. The selected wood pulp of high alpha cellulose count is lightly beaten to a Canadian Standard Freeness of between 400-700 ml. and is then combined with a nontoxic combustion modifier and formed into a sheet having a density of 12-35 lbs./ft.3. The combustion modifiers useable are the potassium, sodium and magnesium sulphates, magnesium and potassium chlorides, sodium, potassium, magnesium and ammonium carbonates and bicarbonates, potassium nitrate, ferric oxide, ferric hydroxide, alumina, magnesium gluconate, citrate, citrate and acetate and gluconic acid. The metallic compounds utilized are preferably used in their hydrated form.

Influence of temperature, light and stimulators and their interaction on the germination and seedling growth ofAlternanthera sessilis

Abstract: Light has a pronounced effect on the germination ofAlternanthera sessilis, but low or high temperature treatments are not so successful. Potassium nitrate can act as a partial substitute and thiourea as a total and better substitute for light. The nature of response produced by these stimulators will depend upon their critical concentration and whether the treatment is followed in the dark. Both these compounds can reduce the inhibitory effect of far-red or red as well as high temperatures. But potassium nitrate-thiourea mixture can augment germination under all types of radiations and in the dark. There is a considerable amount of imbibition with 2 hours of pre-soaking, but germination becomes operative after 24 hours and thiourea gives the best result. On the other hand, only potassium nitrate can promote the growth of seedlings and increase the dry weight of plants.

Process for the manufacture of a chloride-free high-strength potassium ammonium nitrate phosphate fertiliser

Abstract: PROCESS FOR THE MANUFACTURE OF CHLORIDE-FREE HIGHSTRENGTH POTASSIUM AMMONIUM NITRATE PHOSPHATE FERTILISERS BY REACTION OF POTASSIUM CHLORIDE WITH LIQUID OR GASEOUS N2O4 AT A TEMPERATURE OF AT MOST 80*C. THE REACTION MEDIUM USED IS PHOSPHORIC ACID OR A MIXTURE OF PHOSPHORIC ACID AND NITRIC ACID. AFTER REMOVAL OF THE NITROSYL CHLORIDE FORMED AND NEUTRALISING THE RESULTING ACID/ POTASSIUM NITRATE SUSPENSION WITH AMMONIA THE MIXTURE IS SHAPED AND DRIED.

Investigation of the interaction of potassium superperoxide with ammonia

Abstract: 1. The interaction of gaseous ammonia with potassium superperoxide begins at temperatures above 200°, and is accompanied by the formation of potassium nitrate, the hydroxide, and elementary nitrogen. 2. The basic reaction of the process is the oxidation of ammonia to the nitrate.

Utilization of various forms of nitrogen by Drechslera sorokiniana , the pathogen causing foot rot disease in wheat

Abstract: Detailed study was made of the effect of (i) various inorganic and organic sources (potassium nitrate, ammonium sulphate, ammonium nitrate, asparagine, urea) and (ii) various levels of nitrogen (280, 700, 1,400 and 2,100 mg. N per litre) on growth and metabolism ofD. sorokiniana. Observations on mat weight, spore numbers, shift in pH of the medium, nitrogen accumulated in the mat, residual nitrogen (total, nitrate and ammoniacal nitrogen) and residual sugar in the medium were made after incubation for varying periods. The results are presented in detail and discussed.