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Nitrogen

Nitrogen

Comparing foliar and in-soil methods of applying nutrients

Field crops normally absorb the majority of nutrients from the soil through root absorption, but above ground plant structures, especially leaves, are capable of absorbing limited amounts of some nutrients. Because of this, most supplemental nutrients supplied to crops as fertilizer are applied to the soil, and soluble nutrients in the soil contact root hair surfaces, where they are absorbed into the roots and transferred to other parts of the growing plant for metabolic use.

Nitrogen

Assessing available N from fall- and spring-applied N

Excessive rainfall and the resulting ponding, flooding, or saturated soils have likely caused some loss of applied and soil-derived nitrogen (N). Nitrate-N (NO3-N) is the form of N most likely to be lost from the crop root zone, either to tile drainage, groundwater, and/or into the atmosphere (via denitrification). Ammonium-N (NH4-N) is not subject to N loss mechanisms when incorporated into the soil.

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Concerns for N loss in corn from recent storms

Nitrogen losses occur by two main pathways: denitrification (gaseous loss of N) and leaching of nitrate from soil through water leaving the tile line or into groundwater. There is no tool or test that can tell how much has been lost. An estimate can made on the loss potential, which is based on N source, time of application, soil temperature, and number of days that soils have remained saturated.

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Pre side-dress nitrate test (PSNT) for corn

Corn plant nitrogen (N) requirements are large during the rapid growth phases (V8 thru V14) and greatest during grain fill stages. N applied during the preceding fall and early spring, that is much before these important plant growth stages, is subject to more loss through volatilization, denitrification and leaching.

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Yellow, stunted corn ... more than one possible cause

Areas of light green to yellow, often stunted, corn plants are visible in many corn fields throughout the state at this point in mid-June. There is no single cause for such crappy looking corn (Nielsen, 2012) and multiple causes may occur in the same field, which makes for challenging diagnoses and frustrating discussions with the grower.

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Eurochem and Maire Tecnimont to build ammonia plant in Russia

EuroChem Group AG, a leading global agrochemical company, and Maire Tecnimont Group, a technology, engineering and contracting player in the hydrocarbon industry, jointly announced the signing of an Engineering, Procurement and Construction (“EPC”) contract for a new ammonia plant in Kingisepp, Russia.

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