First isolation of natural cyanamide, a possible allelochemical from Vicia villosa Roth.

Effects of Rhizobium Inoculation on Nitrogen Fixation and Growth of Leguminous Green Manure Crop Hairy Vetch (Vicia villosa Roth)

ارزیابی کشت مخلوط درهم جو بهاره (.Hordeum vulgare L) و ماشک گل خوشه ای (Vicia villosa Roth)

به‌منظور مطالعه تأثیر کشت مخلوط درهم بر عملکرد و اجزای عملکرد جو و ماشک گل خوشه‌ای آزمایشی در دو سال زراعی (1394-1393) در ایستگاه تحقیقات کشاورزی و منابع طبیعی میاندوآب بر پایه طرح بلوک­ های کامل تصادفی در چهار تکرار اجرا شد. تیمارهای آزمایشی شامل نه تیمار کشت مخلوط با تراکم‌های250 بوته در متر مربع ماشک+ 300 بوته جو، 250 بوته ماشک+ 500 بوته جو، 250 بوته ماشک + 700 بوته جو، 450 بوته ماشک+ 300 بو...

Bioassay of calcium cyanamide for possible carcinogenicity.

A bioassay of formulated calcium cyanamide for possible carcinogenicity was conducted by administering the test chemical in feed to F344 rats and B6C3F1 mice. Groups of 50 rats of each sex were administered a commercial formulation containing 63% calcium cyanamide in the diet at one of two doses, either 100 or 200 ppm for the males and either 100 or 400 ppm for the females, for 107 weeks. Group...

Contribution of ammonium to stimulation of smooth pigweed (Amaranthus hybridus L.) germination by extracts of hairy vetch (Vicia villosa Roth) residue

Hairy vetch is a leguminous winter annual cover crop that provides a significant contribution toward meeting the nitrogen requirement of succeeding crops. Hairy vetch residue is capable of suppressing weeds, but low levels of residue can intermittently stimulate the emergence of weeds, particularly smooth pigweed. This research was conducted to assess the inhibitory and stimulatory effects of h...

Cropping history affects nodulation and symbiotic efficiency of distinct hairy vetch (<i>Vicia villosa</i> Roth.) genotypes with resident soil rhizobia

Compatible rhizobia strains are essential for nodulation and biological nitrogen fixation (BNF) of hairy vetch (Vicia villosa Roth, HV). We evaluated how past HV cultivation affected nodulation and BNF across host genotypes. Five groups of similar HV genotypes were inoculated with soil dilutions from six paired fields, three with 10-year HV cultivation history (HV+) and three with no history (H...