Organic fertilization: precise application with ISARIA sensors

4.2.2021

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In addition to compliance with legal regulations, organic fertilization using the plant sensor is also responsible for the sustainable success of crop production measures.

ISARIA Pro Active im Einsatz

Precise start fertilization is essential.

Site-specific management has so far been known primarily through the use of plant sensors for mineral fertilization and plant protection. However, initial fertilization is carried out on many farms with manure. This dose within a season is also the most important fertilization. This requires that manure also be used to react to the usually very heterogeneous plant population. In this way, the plants are strengthened and the yield potential is optimally exploited. The correct distribution of organic fertilizer on the plot is necessary, as manure improves soil structure and stimulates the activity of microorganisms.

Precise manure application in spring is crucial for successful crop production throughout the year. The long-term effect of organically bound nitrogen in manure should be considered here: The total nitrogen in the manure does not correspond to the total N content in mineral fertiliser. Only around half of the total N is immediately available to plants. Manure contains immediately available ammonium nitrogen and organically bound nitrogen, which must first be processed by soil organisms such as bacteria before it is available to plants (conversion: organ-bound nitrogen -> ammonium -> nitrate). When organically bound nitrogen is not converted by microorganisms, it causes the important formation of humus.

Balancing fertilization is a good strategy for applying organic fertiliser in spring. The reason is that manure can be used to improve soil structure very well in poorer locations. The ISARIA plant sensors make it possible to see the differences in real time. In contrast to the precise use of fertilizer spreaders, precise application of manure is often neglected. Organic fertilization by cubic meter (m³) is very inaccurate and can cause considerable damage to crop management (e.g. storage grain, lack of nutrients, excessive growth of grains). There are very large variations in the nutrient content of manure in the repository as the components settle. The ingredients often do not match the manure sample.

Organic fertilization with the plant sensor.

The ISARIA sensors PRO Compact and PRO Active In conjunction with a slurry tank that has an integrated NIR sensor, they can optimally distribute the organic matter on the impact. Thanks to the GPS connection, yield potential maps can also be incorporated into fertilization.

With the system, the Bavarian slurry technology manufacturer Zunhammer, for example, enables VAN-CONTROL, which uses near infrared spectroscopy (NIR) to measure the nutrients of manure during refueling, a site-specific application. The system records total and ammonium nitrogen as well as phosphorus, potash and TS content. The tank truck regulates the output rate according to the ammonium nitrogen in the manure and according to the current N requirement, which is determined by the ISARIA plant sensors. This means that fertilization can be carried out precisely according to nutritional requirements. The documentation of fertilization maps, as well as the consideration of yield or soil maps, can be carried out analogously to the known methods for mineral fertilization. All data can be stored in the data management system ISARIA CONNECT be managed.

The benefits are:

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