Response of Sudan Grass to Ammonium Hydroxide in Pot Cultures

Anhydrous Ammonia Retention by Soils as Influenced by Depth of Application, Soil Texture, Moisture Content, pH Value, and Tilth1

“…Chapman (4) used NH 4 0H solution as fertilizer for Sudan grass in his experiments with phosphorus availability in calcareous soils. Recently Maclntire, et al (8), in studying the response of sudan grass to NH.OH, found that, for one crop of Sudan grass, surface addition of NH.OH at rational rates proved virtually as efficacious as equivalent amounts of the sulfate or nitrate.…”

Movement of Ammonia Nitrogen and Phosphorus in an Alkaline Irrigated Soil1

“…Krantz, Ohlrogge, and Scarseth ( 6) conducted that NH 3 -N was not moved appreciably by rai~ water. Macintire et al (7) found NH 3 -N to be essentially _not removable by immediate aqueous leaching or by longdelayed water extraction of the dried soil.…”

“…In the popular mind the application of fertilizers in solution is frequently considered the logical way in which to deliver nutrients to the root zone of plants. However, studies on the mobility of nutrient elements (3,4,6,7,8,10) have shown that, although N0 3 -N can be expected to move into the soil with the water, NH 3 -N 4 and P 2 0 5 can be found concentrated in the vicinity of the point of application. The extent of movement depends largely upon the nature of the fertilizer carrier, the pH Of the soil, and soil texture (3,10).…”

Examples of the Influence of Soil Science on Agronomic Practice1

“…Hutchinson and Miller ( 42) reviewed the subject extensively as early as 1909. According to Maclntire et al (58), Tiedjens and Robbil!s (91) pioneered the direct application of ~H 4 0H to sods. The exchangeability of NH 4 for other wns was one of th~ early established facts of the base exchange process.…”