Keywords: Lathyrus sylvestris L., the proportion of brown pods, peat and sod-gley soil, the structure of the stem, the number of seeds on the plant.

// Мелиорация.– 2021. – №2(96) – P 37–42

On average, over the years of use of the Lathyrus sylvestris L. seed crop, the number of stems per plant on the
peat soil of the southern zone of Belarus varied more (V = 14 %) than on the mineral soil of the central zone (V = 4.7 %). The number of seeds in the pods and, accordingly, the weight of seeds from one plant was maximum when harvesting crops with a proportion of brown pods of 60 %, both on the peat soil of the southern zone and on the mineral soil of the central zone. The optimal harvest time is Lathyrus sylvestris L. on seeds is the phase of plant development, in which about 60 % of the beans of the upper tier of branches acquire a brown color. The seed yield in this phase was 7.4 c/ha on the sod-gley soil in the central zone on average for 3 years, and 4.5 c/ha on the peat soil of the southern zone. When harvesting seeds in the later phase (70 % of brown pods), their yield decreased due to shedding..