Detection of the Organic Fertilizer
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Latvia University of Agriculture

1. Circumstances and methodology of the trial The trials of the field were established in Sknveri, in the Institute of Agriculture of the Latvia University of Agriculture (LUA). Within the trial were cultivated the sorts: spring wheat “Robijs” and potatoes “Agria”. The sort “Robijs” (2007), created in the Stende Research Centre of the Agro-Resource and Economic Institute, is a moderately intensive type sort, which is suitable for the production of food and feed grain. The sort is suitable for cultivation according to conventional and biological management methods. The harvest potential is...

The establishment of the trial is shown in pictures 1, 2 and 3. Pic.1. The 1st version of the trial before the furrows are earthed-up. Pic.2. The 2nd version of the trial before the furrows are earthed-up. Pic.3. The 3rd version of the trial before the furrows are earthed-up.

Agricultural engineering Spring wheat The trial was established in a turf podsol soil, where the agrochemical indicators of the soil (determined in 2016) are as follows: pHCl 5.5, organic matter content 2.0 %, amount of phosphorus available to plants 113 mg kg-1 (average) and potassium – 130 mg kg-1 (average). Seeding rate – 500 germinating grains on m-2. Previous plant – perennial grassland 10.04.2017. – soil treatment with discs 02.05.2017. – embedding of fertilizer according to the trial versions 03.05.2017. – milling 03.05.2017. – sowing 30.05.2017. – Nitrogen supplementary fertilizer:...

April aprīlis jūnijs June jūlijs July September septembris augusts August Mēneši Months Vidējā gaisa temperature oC Average air temperatūra, Ilggadējie averages Long-term vidējie Pic.4. average air temperature during the vegetation period, 2017 (data from Skrīveri Observation Station of LVĢMC) II II III June III I jūnijs jūlijs June July Months augusts August septembris September Nokrišņuof precipitation, mm Ilggadējie vidējie Long-term averages Amount daudzums, mm Pic.5 average amount of precipitation during the vegetation period, 2017 (data from Skrīveri Observation Station of LVĢMC)...

-3.5 °C. In May there is a lack of precipitation - during May there was fallen only 39% of the monthly rate. The further vegetation period is cool and rich with precipitation, which significantly affects the growth and evolution of the spring wheat. Only in few decades the air temperature achieves or slightly exceeds the monthly rate (the 1st and 2nd decade of June and 1st and 2nd decade of August). While the amount of precipitation is close to the monthly rate or significantly exceeds it (1st and 2nd decade of June, 2nd and 3rd decade of August). In the trial already in June12 there was...

Potatoes Similarly as to the wheat, also the growth and evolution of potatoes is affected by rich precipitation and relatively low ambient temperature during the period of vegetation. At the potato planting time (19th of May) were very favourable weather conditions, the soil was warm, the sprouts for potatoes appeared on the 6th of June. The cool weather delayed the development of the stalk rot, the first spraying was performed on the 7th of July (relatively late to other years). The development of disease in the planting was low up to medium. The long lasting rain period in August and...

The use of fertilizes and type of embedding affected the potato fraction distribution in harvest. The common use of the organic fertilizer OrganiQ and mineral fertilizers, imitating the planting machine, significantly increased the size of tubers, in this version there is significantly increased the proportion of tubers with a size of 45-75 mm. Mineral fertilizer OrganiQ + mineral fertilizer, imitating the planting machine Pic.6. The weight of potato fractions (t ha-1) and distribution in harvest, % 1. The use of the organic fertilizer OrganiQ significantly increased the harvest of wheat in...