CROP:  Potato, "Skarb" variety

PRODUCT: Fe20 (foliar application)

YEAR:  2023

COUNTRY: Kazakhstan

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APPLICATION:‍

1. Control. Фон NPK. (Variant 1)
2. Background NPK + Fe20. Foliar application: 1st - in the phase of full germination (plant height 15-20 cm), 2nd - in the budding phase, product consumption - 1.5 kg/ha, working solution consumption - 300 l/ha. (Variant 2)
3. Background NPK + Fe20. Foliar application: 1st - in the phase of full germination (plant height 15-20 cm), 2nd - in the budding phase, product consumption - 2.0 kg/ha, working solution consumption - 300 l/ha. (Variant 3)
4. Background NPK + Fe20. Foliar application: 1st - in the phase of full germination (plant height 15-20 cm), 2nd - in the budding phase, product consumption - 3.0 kg/ha, working solution consumption - 300 l/ha. (Variant 4)

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Trial plots area – 100 m², observed plots area – 25 m². Trial repetitiveness — four times.  

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RESULT:  

1. Yield increase compared to control with NPK background: 6.54-12.42%.
2. The yield increase resulted from improvements in yield structure: tuber weight per plant increased by 4.0-5.1%.
3. The share of the marketable fraction increased by 5.2-16.3% (number of large tubers, fraction over 60 mm).
4. Quality indicators improved: vitamin C content increased by 11.4-20.5%, nitrate content decreased by 4.4-25%.
5. Starch content was not affected by the treatment.
6. The maximum result was achieved with a double application at a 3.0 kg/ha dose.
7. All yield increases exceeded the experimental error and were statistically significant.

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