Спасибо, вы меня успокоили.

Ионов кальция в почве и так много. В черноземах карбоната кальция килограммы на квадратный метр. Он даже «самородки» там образует. Гуглите почвоведение :белоглазка, деребчики, куклы.

сложно представить, как ионы кальция как могут повредить, и защелачивать кальциевая селитра почву точно не может

голубятня из энциклопедии Дидро и Д’Аламбера
https://planches.encyclo.eu/planche.php?nom=ECONOMIE&nr=3

Аммиак, а точнее аммиачная вода — побочный продукт получения кокса (в коксовых батареях, в не ульевых печах, что важно). Дальше она обрабатывается серной кислотой и в результате получается сульфат аммония.
Работы проводились в начале 20 века, когда объемы металлургии, а значит и потребления кокса, были уже чудовищными. Серная кислота — аналогичный побочный продукт металлургии (той же меди)
И кстати, если смотреть внимательно, тут же в статье предлагается получать аммиак возгонкой торфа (что попроще построения коксовых батарей)

//Классическим способом вызвать нитрификацию является заражение среды небольшим количеством измельченной почвы. Часто нитритную реакцию можно наблюдать уже на 4—5-е сутки, однако иногда она запаздывает на несколько недель или даже вообще не развивается. Причина этого кроется, с одной стороны, в различной концентрации специфических микробов в образцах почв, с другой,— в степени сохранности образца. Так, из образцов, хранившихся в высушенном состоянии, нельзя ло- лучить жизнеспособной культуры. Короче, во избежание неудач, следует брать плодородную почву или перегной и извлекать образец с глубины 10 см.//

Пироксилин — это сложно. Вы даже нормальную вату не найдете
Но если есть нитраты и серная кислота — открывается область нитросоединений. И там уже возможно все)))

//Lant, or stale urine, is a very important source of ammonia.
Whenever nitrogenous organic bodies are decaying, ammonia is always formed; when the organic substance is a proteine compound, there is formed carbonate of ammonia as well as sulphuret of ammonium; but when the organic substance contains no sulphur, only carbonate of ammonia is formed, as is the case with the urea,CH4N20, contained in urine, the urea by taking up the elements of the water being converted into carbonate of ammonia. Lant is frequently employed without further preparation for various purposes, on account of the carbonate of ammonia it contains, as, for instance, in washing wool and removing the fat from flannel
and other woollen fabrics.
The apparatus exhibited in Fig. 114, contrived by Figuera, and until lately in operation at a largeestablishment for the utilisation of the contents of the latrines and cloace of Paris, consists of a steam — boiler, w, the steam generated in which is conveyed to twolarge iron cylinders filled with lant. The carbonate of ammonia expelled is, withthe steam, condensed in a leaden worm; the cooled liquid is conveyed to a tank filled with acid, and thus converted into carbonate of ammonia. The arrangement of the apparatus is as follows: — The wooden vessel, a, contains some 250 hectolitres of lant, and is filled by means of the tube h. c and c’ are two cylindrical sheet-iron vessels of 100 hectolitres capacity; P and P’ are similar vessels, the use of which will be presently explained. At the commencement of the operation the boiler, w, is filled with about 130 hectolitres of exhausted lant, taken from the vessels c and c’. The lant in a, warm in consequence of having served for condensation, is conveyed to c by a tube, and thence by the tube h» toc, cold lant being poured into a. The boiler, w, is fitted with three tubes, viz, T, the steam pipe, m, a safety tube, brought to within a few centimetres from the bottom of the boiler, and carried above the roof of the shed, and n a smaller safety tube; v is a tube fitted with a stopcock. The steam evolved in w is carried by t into c’, evolving from theliquid therein the carbonate of ammonia it holds in solution. The carbonate, with the steam passes through t into the vessel , P, which serves to retain any liquid carried over from c’. The carbonate of ammonia vapour now passes from p through the tube r’ to c, and taking up in that vessel more carbonate of ammonia, is conveyed through the tube T’ into p’ (which again serves the purpose of P), and thence through r» into the leaden worm of the condensing apparatus. The condensed liquor, a moreor less concentrated solution of carbonate of ammonia, is run through t» into s, a wooden vessel, lead lined, and filled with a sufficient quantity of sulphuric acid to saturate the carbonate of ammonia. The wholeoperation lasts about twelve hours; after this time the wasteliquid in the boiler is run off by opening the stopcock, v, and the operation again repeated. On an average the lant operated upon at Bondy, near Paris, yields per cubic metre from 9 to 12 kilos. of sulphate of ammonia, and at each operation 200 kilos. of that salt are obtained by the working of one of the apparatus just described. It is stated that, from the 800,000 cubic metres of urine yearly run waste in Paris alone, there could be obtained, by proper treatment, 7 to 800,000 kilos. of sulphate of ammonia.//

//2. The preparation in Tuscany of native sulphate of ammonia as a by-product of the preparation of boracic acid has recently become important. The suffioni contain, in addition to boracic acid, sulphates of potassa, soda, ammonia, rubidium, &c.; and that
the quantity of these substances is by no means small may be inferred from Travale’s researches, from which it appears that four suffioni yielded within twenty-four hours 5000 kilos. of saline matter, consisting of 150 kilos. of boracic acid, 1500 kilos. of sulphate of ammonia, 1750 kilos. of sulphate of magnesia, 750 kilos. of the protosulphates of iron and manganese, &c. The ammonia is probably due to the decomposition of nitrogenous organic matter , occurring largely in the Tuscan mountains, the soil near the lagoons being impregnated with sulphate of ammonia. In combination with the sulphates of soda, magnesia, and iron, sulphate of ammonia forms the mineral Boussingaultite, discovered by Bechi.
3. The ammoniacal salts due to volcanic action are of no or of little value to industry. Mascagnin, sulphate of ammonia, is met with on Vesuvius and Etna; sal-ammoniac is sometimes also found on Etna, as in the years 1635 and 1669, in such large quantities
as to become temporarily an article of commerce at Catania and Messina.//
Полторы тонны сульфата аммония в день? Неплохо

«которые можно найти в значительных количествах на местном рынке»
«На рынке» это сильно. Но, может, там сразу и селитру прикупить, чтоб не мучится?