The air-suction precision seed-metering device is prone to the instability of seed adsorption state, which arises from blockage suction hole and leads uneven seeding. This paper analyzed determined key structural parameters plate, then established an mechanics model during migration process designed structure with aim improving uniformity high-speed direct seeding vegetables. Furthermore, we us...

genetic variation of 20 genotypes (15 exotic collected from icarda, and 5 endemic collected from various regions of iran: ardebil, oshnaviyeh, qazvin, shahre kord and mashhad) were studied during the 2007-2008 growing season, using morphological and phenological traits. the resultant data were examined for normality test and were then analyzed according to randomized complete block design (rcbd...

Background & Aim:Citrus paradisi Macfad (Rutaceae) seed extract (CPE) is used in folkloric medicine for the management of diabetes, blood deficiencies and as immune booster, which may require long term usage. This study aimed to evaluate the toxicity profile of ethanol seed extract of grapefruit in adult Wistar rats in order to determine its safety profile in whole org...

Habitat degradation can reduce or even prevent the reproduction of previously abundant plant species. To develop appropriate management strategies, we need to understand the reasons for reduced recruitment in degraded ecosystems. The dioecious coco de mer palm (Lodoicea maldivica) produces by far the largest seeds of any plant. It is a keystone species in an ancient palm forest that occurs only...

Intercropping systems influence yield variables of the component crops, such as harvest index, hundred seed weight, number of reproductive organs and number of seeds, within each reproductive unit. Two experiments were carried out at each of two sites during 1993 and 1994. The first experiment investigated the effects of seeding soybean or lupin alone or in combination with one of three forages...

A study of nursery stock performance was conducted on four sites in the Tongass National Forest in southeastern Alaska: two sites at Fire Cove (Ketchikan Ranger District [R.D.]) and one each at Anita Bay (Wrangell R.D.) and Eight Fathom (Hoonah R.D.). Containerized Sitka spruce seedlings used in the study were grown at USDA Forest Service nurseries in Petersburg, Alaska, and Coeur d'Alene, Idah...

A bstract We use the Poincaré series method to compute gravity partition functions associated SU( N ) 1 WZW models with arbitrarily large numbers of modular invariants. The result is an average over these invariants, weights being given by inverting a matrix whose size order number For chosen models, this takes special form that allows us invert it for arbitrary and thereby explicitly calculate...

This study evaluated the impact of region and season on growth in Angus seed stock. To assess geographic differences, the United States was partitioned into 9 regions based on similar climate and topography related to cow-calf production. Seasonal effects were associated with the month that animals were weighed. The American Angus Association provided growth data, and records were assigned to r...

Semi-dwarf genes have been used to alleviate lodging and increase harvest index in barley. The present study was conducted determine the effect of widely sdw1.d allele on agronomic characters. transferred from cv. Triumph Tokak 157/37 using marker assisted backcross breeding, a near-isogenic line developed. Parents + near isogenic were evaluated three rainfed, fall-planted seven spring-planted ...