background and objectives: early watergrass (echinochloa oryzoides) is considered as a new-introduced species and then as a potential invader. investigation of competitive traits of this species, in comparison with barnyardgrass (e. crus-galli), one of the most important weeds in rice fields of guilan province, would be useful to determine its spreading possibility as an aggressive weed. theref...

Remote sensing-based mapping of crop nitrogen (N) status is beneficial for precision N management over large geographic regions. Both leaf/canopy level content and accumulation are valuable nutrient diagnosis. However, previous studies mainly focused on leaf (LNC) estimation. The effects growth stages the modeling accuracy have not been widely discussed. This study aimed to estimate different p...

In greenhouse experiments Hirschmanniella oryzae, H. imamuri, and H. spinicaudata depressed and delayed the tillering and flowering of rice, and suppressed root and shoot growth and grain yield.

Background Achieving satisfactory weed control levels in black oat (Avena strigosa) fields is often difficult, owing to the limited number of registered herbicide molecules. Objective To determine novel options for selective, post-emergence chemical this crop. Methods Eight treatments were sprayed field onto plants at tillering stage evaluate crop safety and Conyza spp. Gamochaeta americana, tw...

The identification of the application stage and correct dose 2,4-dichlorophenoxyacetic acid (2,4-D) herbicide is important so that wheat not harmed. In view this, objective this study was to evaluate effect 2,4-D doses applied at different development stages crop. experiment conducted in a randomized block design, arranged 4 × 5 factorial scheme, with four replications. factor A, (before tiller...

Agro-meteorological aspects of wheat (Triticum aestivum.L.) at New Delhi have been studied in this paper. A data set six years during the crop growing season between 1985 to 1993 has utilized. The growth period divided into important stages i.e., crown root initiation, tillering, elongation, flowering, grain development and maturity. Water requirement various its growth, water use efficiency, c...

In a pot culture experiment, the root length density, potassium concentration in crop, and total K uptake by wheat (Triticum aestivum var. HD 2285) at different growth stages (CRIS-Crown Root Initiation Stage, MTS-Maximum Tillering Stage, FLS-Flag Leaf Stage and DFS-Dough Formation Stage) were determined. Wheat crop was grown in 72 pots containing 4.5 kg of three types of soils, namely Alfisol,...

The microRNA miR393 has been shown to play a role in plant development and in the stress response by targeting mRNAs that code for the auxin receptors in Arabidopsis. In this study, we verified that two rice auxin receptor gene homologs (OsTIR1 and OsAFB2) could be targeted by OsmiR393 (Os for Oryza sativa). Two new phenotypes (increased tillers and early flowering) and two previously observed ...

Phenology has a profound effect on adaptation and productivity of crops. The impact of phenology on tillering and fertility traits of durum wheat (Triticum turgidum L. subsp. durum Desf.) was evaluated with the aim of specifying which group of flowering genes (Vrn, Ppd, or eps) was involved in their control. A recombinant inbred line population was grown under four contrasting conditions of ver...