in order to study the effect of sowing dates and cultivation methods on yield and other characteristics of two cultivars of common bean (phaseolus vulgaris l.) an experiment based on split plot design was carried out with three replications in 2007 at khorramdarreh region of zanjan province. treatments consisted of three sowing dates (may 21, june 4&19), two cultivation methods (furrow and basi...

The article is devoted to determining the optimal sowing time for soybeans with stable warming of soil, considers processing a stratifier PRSM-5 and chisel against background pre-sowing rolling. Using soil-cultivating units three types, an analysis was made effectiveness various methods basic cultivation agricultural practices. timing soybean determined heating soil 8–10 o С when treated up 10–...