intercropping is considered for increasing and stability of yield in per unit. in order to evaluating the effect of corn/soybean intercrop in different planting dates, a study was carried out in agricultural sciences and natural resources, university of sari, faculty of agriculture during 2005-2006. the experiment was a split plot design based on randomized complete block design with four repli...

Kernel number per ear (KNE) is one of the most important yield-related agronomic traits in maize (Zea mays). To clarify its genetic basis, we made a quantitative trait locus (QTL) analysis of KNE in a recombinant inbred line population derived from lines Mo17 and Huangzao4, under two nitrogen (N) regimes. Seven QTLs, on chromosomes 4, 6 and 9, were mapped under the high N regime, which ex...

The separation of male and female flowers in maize provides the potential for independent regulation of traits that affect crop productivity. For example, tassel branch number controls pollen abundance and length of shedding time, whereas ear row number directly affects kernel yield. Mutations in duplicate SBP-box transcription factor genes unbranched2 (ub2) and ub3 affect both of these yield t...

agroecology emphasizes the use of organic materials in agriculture. the organic acids are important sources of organic materials. in order to study the effect of different levels of humic acid on yield and yield components of corn (zea mays l.) an experiment was conducted at research station, faculty of agriculture, ferdowsi university of mashhad, iran, during 2009. the experiment was conducted...

We compared and contrasted the maintainability of four open-source operating systems: Linux, FreeBSD, NetBSD, and OpenBSD. We used our categorization of common coupling in kernel-based software to highlight future maintenance problems. An unsafe definition is a definition of a global variable that can affect a kernel module if that definition is changed. For each operating system we determined ...

BACKGROUND: Overuse of fertilizers can lead to groundwater contamination, depletion of soil microorganisms and beneficial insects, increased crop susceptibility to diseases, acidification or alkalization of soil, damage to soil structure, reduced organic matter and soil fertility. Therefore, for achieve sustainable agricultural, it is necessary to reduce the consumption of conv...

We propose an ear recognition system based on 2D ear images which includes three stages: ear enrollment, feature extraction, and ear recognition. Ear enrollment includes ear detection and ear normalization. The ear detection approach based on improved Adaboost algorithm detects the ear part under complex background using two steps: offline cascaded classifier training and online ear detection. ...

oil has an important role in human food. an experiment was conducted in order to evaluate the response of spring genotypes of safflower to irrigation disruption in reproductive growth different stages, in a spilt plot arrangement based on randomized complete block design with four replications at research farm, faculty of agriculture, university of birjand during 2008. irrigation regimes (full ...