Results 1 to 10 of about 1,086,731 (116)

Plot size matters: Toward comparable species richness estimates across plot‐based inventories [PDF]

Ecology and Evolution, 2022
To understand the state and trends in biodiversity beyond the scope of monitoring programs, biodiversity indicators must be comparable across inventories. Species richness (SR) is one of the most widely used biodiversity indicators.
Jeanne Portier, Florian Zellweger, Jürgen Zell, Iciar Alberdi Asensio, Michal Bosela, Johannes Breidenbach, Vladimír Šebeň, Rafael O. Wüest, Brigitte Rohner   +8 more
doaj   +2 more sources

Plot Size, Adjacency, and Farmland Rental Contract Choice

Land, 2022
The purpose of this paper is to assess the impact of plot size on the components of farmland rental contracts choice and evaluate the effects of its heterogeneities on different plot characteristics in the context of China.
Yueming Cao, Yunli Bai, Linxiu Zhang
doaj   +3 more sources

Effects of Sample Plot Size and GPS Location Errors on Aboveground Biomass Estimates from LiDAR in Tropical Dry Forests

Remote Sensing, 2018
Accurate estimates of above ground biomass (AGB) are needed for monitoring carbon in tropical forests. LiDAR data can provide precise AGB estimations because it can capture the horizontal and vertical structure of vegetation. However, the accuracy of AGB
José Luis Hernández-Stefanoni, Gabriela Reyes-Palomeque, Miguel Ángel Castillo-Santiago, Stephanie P. George-Chacón, Astrid Helena Huechacona-Ruiz, Fernando Tun-Dzul, Dinosca Rondon-Rivera, Juan Manuel Dupuy   +7 more
doaj   +3 more sources

Influence of Plot Size on Efficiency of Biomass Estimates in Inventories of Dry Tropical Forests Assisted by Photogrammetric Data from an Unmanned Aircraft System

Remote Sensing, 2017
Applications of unmanned aircraft systems (UASs) to assist in forest inventories have provided promising results in biomass estimation for different forest types.
Daud Jones Kachamba, Hans Ole Ørka, Erik Næsset, Tron Eid, Terje Gobakken   +4 more
doaj   +3 more sources

Estimation of Optimum Plot Size in Split-Split Plot Design Used in Field Experiment [PDF]

The Egyptian Statistical Journal, 1999
Estimates of soil heterogeneity are obtained from Split-Split plot design. A weighted regression analysis method is used to determine the soil heterogeneity from the analysis of variance technique of the above design.
Saiful Islam, Kalipada Sen, Kamal Rahim, Yusuf Ali   +3 more
doaj   +1 more source

Soil Organic Carbon Storage in Urban Green Space and Its Influencing Factors: A Case Study of the 0–20 cm Soil Layer in Guangzhou City

Land, 2022
Urban soils can contribute to organic carbon sequestration. The socioeconomic drivers of soil organic carbon (SOC) in urban areas may differ between regions due to the different land tenure and its derived green space management regimes.
Jifeng Du, Mengxiao Yu, Yanguo Cong, Huanzhe Lv, Zhongyou Yuan   +4 more
doaj   +1 more source

Experimental plot size of passion fruit [PDF]

Revista Brasileira de Fruticultura
The determination of the plot size is a practical matter pertinent to the experimental planning, and its optimal characterization allows to obtain higher precision and better quality in the results.
Glaucia Amorim Faria, Beatriz Garcia Lopes, Ana Patrícia Bastos Peixoto, Antonio Flávio Arruda Ferreira, Kátia Luciene Maltoni, Lucas Bernardo Pigari   +5 more
doaj   +2 more sources

Heterogeneidade do solo sob diferentes adubações na cultura do milho Soil heterogeneity under different fertilizer levels in maize crop

Ciência Rural, 1998
A partir dos dados de um experimento bifatorial em parcelas subdivididas no delineamento inteiramente casualidade, com três formas de adubação nas parcelas principais, e com duas cultivares de milho, com 10 repetições (20 subparcelas), foram estudados: a
Sidinei José Lopes, Lindolfo Storck
doaj   +1 more source

Heterogeneidade do solo e de tamanho de amostra antes e após cultivos com abobrinha italiana em estufa plástica Heterogeinity of soil and sample size, before and after italian pumpkin cropping in a greenhouse

Ciência Rural, 2006
O presente trabalho teve por objetivo avaliar o índice de heterogeneidade através das seguintes características químicas do solo: fósforo, potássio, percentagem de matéria orgânica, cálcio, capacidade de troca de cátions efetiva, magnésio, alumínio e pH ...
Sandra Feijó, Lindolfo Storck, Alessandro Dal'Col Lúcio, Sidinei José Lopes   +3 more
doaj   +1 more source

Does Outsourcing Service Reduce the Excessive Use of Chemical Fertilizers in Rural China? The Moderating Effects of Farm Size and Plot Size

Agriculture, 2023
The excessive use of chemical fertilizers (OCF) is one of China’s main sources of agricultural nonpoint source pollution. It is debatable whether outsourcing service adoption (FOS) reduces OCF.
Bowei Li, Yanjun Qian, Fanbin Kong
doaj   +1 more source