in order to investigate the effect of seed rate on seed yield and yield components of three rapeseed varieties, a split- plot experiment was conducted in randomized complete block design with four replicates during 2008-2009 at baykola agricultural research station, neka, mazandaran province. in this experiment four seed rates (5, 7, 9 and 11 kg.ha-1) as main plots, three rapeseed cultivars (hy...

Abstract In this study we investigated the behaviour of aggregate prediction errors in a forest inventory augmented with multispectral Airborne Laser Scanning and airborne imagery. We compared an Area-Based Approach (ABA), Edge-tree corrected ABA (EABA) Individual Tree Detection (ITD). The used 109 large 30 × m sample plots, which were divided into four 15 subplots. Four different levels aggreg...

Root exudation is a key component of nutrient and carbon dynamics in terrestrial ecosystems. Exudation rates vary widely by plant species and environmental conditions, but our understanding of how root exudates affect soil functioning is incomplete, in part because there are few viable methods to manipulate root exudates in situ. To address this, we devised the Automated Root Exudate System (AR...

Confronted with the revelation that the 24 possible non-nested samples reuse the same subplots in various fashions, I’m having second thoughts about the methods I proposed to you. It’s not so much that many of the non-nested sample estimates will be correlated with each other (because they share observations), but more that the correlation varies (because the number of observations shared betwe...

Mutation induction is considered as an effective way to enrich plant genetic variation, particularly for traits with a very low level of genetic variation. This research was conducted to assess genetic variation induced by gamma radiation in M2 and M3 mutant lines of canola (Brassica napus L.) by SSR and morphological characteristics and to identify useful mutants in terms of agronomic traits. ...

Both Qian et al. (1) and Tuomisto and Ruokolainen (2) critique the Gentry data sets. Qian et al. state that b diversity among Gentry subplots is not comparable across locations because the spatial orientation of the subplots varies among locations. Subplot spatial orientation varies haphazardly across sites, and no systematic trends in spatial orientation exist. Therefore, gradients in Gentry p...

To study the effect of nitrogen fertilizer sources and foliar spray of organic acids on rice crop, In this regard, this test was performed in 2010 and 2011 years at ElGemmeiza Agricultural Research Station, El-Gharbia Governorate located at lat. 30.47, long 31.00 and 14.80 m above the mean sea; the used design was split plot randomized complete block with 3replications. Main plots, two nitrogen...

A field experiment was conducted at the Bidhan Chandra Krishi Viswavidyalaya, Mohanpur, Nadia, West Bengal, during spring-summer seasons of 2020 and 2021, to study effect Co, K, B date sowing on blackgram [Vigna mungo (L.) Hepper]. The laid out in a split-split plot design, comprising 2 dates March with 15 days interval main plot, levels soil application Co 4 kg/ha subplots 5 foliar spray 1.25%...

ABSTRACT The objective of this study was to evaluate nutrient export, nutritional balance and macronutrient recovery rate in ‘Gigante cactus pear under different fertilization doses, spacings configurations during three production cycles. 72 treatments were arranged a randomized block design with repetitions, two the plots (triple quadruple row), subplots (3.00 x 1.00 0.25 m; 3.00 0.16 m 0.125 ...

in order to investigate the effects of single irrigation amounts at different stages of rapeseed growth on yield and the improvement of water use efficiency and water productivity indices, this experiment was conducted as split plot arranged in a randomized complete block design (rcbd) with three replications during 2002-2003 for rainfed spring rapeseed variety (pf.7015.91= sarigol) at maragheh...