نتایج جستجو برای: seed system

تعداد نتایج: 2300111  

Journal: :African Crop Science Journal 2022

Swift delivery of quality seeds to farming communities is a fundamental step in mainstreaming the value chain orphan crops. The objective this study was characterise seed production and systems Kersting’s groundnut (KG) [Macrotyloma geocarpum (Harms) Maréchal & Baudet] their influence on Benin. A survey conducted among 305 farmers from major KG growing areas total 60 samples were collected ...

2017
Jacob van Etten Isabel López Noriega Carlo Fadda Evert Thomas

> Seed systems are crucial for sustainable food system outcomes: agricultural sustainability, food security and healthy diets. > Production and distribution, innovation and regulation are the key functions of seed systems, which make a difference to sustainable food systems. > Currently used methods to measure the performance of seed systems concentrate narrowly on their contribution to agricul...

2010
Hongguang Cui Wentao Ren Benhua Zhang Yi Yang Lili Dai Quanli Xiang

In order to adapt to the requirements of the development for precision agriculture technology, making the rice seed tape planting technology has been widely used. The paper-making improved the design on the rice seed tape twisting machine especially the seed tape winding units. It proposed seed tape winding automatic control system based on STC90C514AD to realize the rotating speed adjustment o...

Morad Shaban, Sanaz Kamali

Changes in seed dormancy were selected during the domestication of crop plants from wild-plant species, because some features of dormancy that provide ecological advantages presented agronomic disadvantages within a farmed system. Seed dormancy varies widely among seed batches, even for seeds of the same genotype, indicating large environmental influences. For genetic studies, it is essential t...

1998
Julie Howard

BACKGROUND: Seed can play a critical role in increasing agricultural productivity: it determines the upper limit of crop yields and the productivity of all other agricultural inputs to the farming system. In the mid-1970s, governments and donors recognized the critical role of seed in agricultural transformation and began to provide substantial support for seed system development. Since then, F...

2013
Jack Dekker

The nature of weeds is a complex adaptive, soil-seed communication system. The nature of weedy Setaria life history is an adaptable, changeable system in which complex behaviors emerge when self-similar plant components self-organize into functional traits possessing biological information about spatial structure and temporal behavior. The nature of the weedy Setaria is revealed in the physical...

Morad Shaban, Sanaz Kamali

Changes in seed dormancy were selected during the domestication of crop plants from wild-plant species, because some features of dormancy that provide ecological advantages presented agronomic disadvantages within a farmed system. Seed dormancy varies widely among seed batches, even for seeds of the same genotype, indicating large environmental influences. For genetic studies, it is essential t...

2017
Y. Lan Michael F. Kocher John A. Smith

An opto-electronic sensor system for measuring seed spacing uniformity with different types of seeds is described in this paper. It consisted of a rectangular photogate block (124 × 92 mm) with 24 phototransistors (diameter, 3 mm) receiving light beams from 24 light emitting diodes (diameter, 3 mm) opposite them, a digital input/output board in a personal computer, and power supplies. The opto-...

Journal: :Outlook on Agriculture 2021

Yam is an important food and cash crop in Nigeria. The seed system mostly farmer-based its challenges opportunities are not well documented. This study reports results of surveys, interviews, focus group discussions participant observations that describe local practices characterizing yam cultivation the five states Our findings show ware dynamic highly commercialized goods There a high demand ...

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