Published in Scientific Papers. Series A. Agronomy, Vol. LXIII, Issue 1
Written by Valerian CERBARI, Tamara LEAH
The system of conservative agriculture is not suitable for compacted soils of the Republic of Moldova, which need first loosening, a fact confirmed by recent researches. In the drought years, due to the high resistance to the penetration of the dry arable layer, the penetration of water and roots into the depths is impossible, which leads to the decrease of the agricultural crops yields. The use of green fertilizers (autumn and spring vetch, sown in an agricultural year as a 'busy field' of 5-filds crop rotation), whose green mass is introduced into the soil as organic fertilizer, leads to the positive remediation of the quality status of this layer. As a result of applying the green fertilizers through disking for a period of 5 years showed that the balance of carbon and nitrogen in the soil became positive for future 3-4 agricultural years; the physical quality state of the arable layer became favorable for agricultural crops; the crop yield increase with 1.0-0.5 t/ha/year. In order to maintain the long-term quality status of the Mini-till cultivated soils, it is necessary that, starting with the third year of cultivation, the field should be sown again with vetch as an intermediate crop, used at the end of April or the beginning of May for next year as a green manure. This process must be repeated permanently once in three years, which will ensure that the soil quality condition is maintained in a favorable state and that the nitrogen fertilizer needs to be reduced to 60-70%.
[Read full article] [Citation]
