Method of mungbean establishment in saturated soils following lowland rice
1991
Liboon, S. | Garrity, D.P. (International Rice Research Inst., Los Banos, Laguna (Philippines))
A novel technique for establishing upland crop in saturated paddy soils was tested based on the observation that deep planting is feasible with an adequate gaseous exchange pathway up to the soil surface. Three field experiments were conducted to compare the performance of mungbean (Vigna radiata (L.) Wilzeck) using the 'plunger planter' method of crop establishment against five other methods on a post rice rainfed environment during the 1990 and 1991 dry seasons at the International Rice Research Inst. [Los Banos, Laguna, Philippines]. Mungbean planted using the plunger planter on saturated soil consistently produced higher yields than the furrow-hand drill (minimum tillage) and conventional furrow-hand drill (high tillage) method or other zero till mechanical seeders (slit and inverted "T" seeders). When planting at the optimum depth (6-8 cm) the plunger planter increased seedling emergence, final plant count, and initial plant growth, which were characters associated with high yield. Planting in saturated soil hastened early crop growth through deeper root proliferation. In the other methods, planting was delayed until soil moisture content has decreased below saturation to obtain an adequate bearing capacity for field operations, but this was not necessary with plunger planting. Delayed establishment reduced yield because of limited moisture, and high soil strength which restricted root growth
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