Row patterns affected irrigated corn productivity when grown in the Mid-South region of the United States. Narrow (76 cm) row spacing increased grain yield 8% when compared to traditional wide (96-102 cm) row spacing. Twin rows (20-25 cm spacing) in a wide (96-102 cm) row pattern, produced similar grain yield as a traditional wide single row. At a normal plant density of 79,040 ha-1, traditional wide rows yielded 10.51 Mg ha-1, twin wide rows yielded 10.34 Mg ha-1, and the narrow rows yielded 11.33 Mg ha-1. Growing corn at various plant densities did not affect corn grain yield response to various row patterns. As a comparison the traditional wide rows and twin rows were similar in their yield, and the narrow rows performed better. Corn grain yields for the traditional 96-102 cm wide single rows were 11.20 Mg ha-1, wide 96-102 cm twin rows yielded 11.22 Mg ha-1, and narrow 76 cm rows produced 12.07 Mg ha-1. Row pattern had no effect on corn plant height, photosynthetically active radiation (PAR), leaf area index (LAI), SPAD, stalk diameter, and plant lodging in either study.

Submitted by Marlene Santos (marlene.bc.ufg@gmail.com) on 2016-07-29T20:31:45Z No. of bitstreams: 2 Dissertação - Tiago Camilo Duarte - 2016.pdf: 1799186 bytes, checksum: 59814a5871558965ce2ab372718e6536 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Approved for entry into archive by Luciana Ferreira (lucgeral@gmail.com) on 2016-08-01T13:55:17Z (GMT) No. of bitstreams: 2 Dissertação - Tiago Camilo Duarte - 2016.pdf: 1799186 bytes, checksum: 59814a5871558965ce2ab372718e6536 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) / Made available in DSpace on 2016-08-01T13:55:17Z (GMT). No. of bitstreams: 2 Dissertação - Tiago Camilo Duarte - 2016.pdf: 1799186 bytes, checksum: 59814a5871558965ce2ab372718e6536 (MD5) license_rdf: 0 bytes, checksum: d41d8cd98f00b204e9800998ecf8427e (MD5) Previous issue date: 2016-02-29 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - CAPES / The soybeans have been broadly cultivated in Brazil and the world due to it`s food and economic importance, that boost many agroindustrial complexes. The objective of this study was evaluate the effect of spatial arrangements, simple and twin rows, associated with different fertilizing levels on the development and yield at Anta 82 RR soybean cultivar. The experiment was carried in Universidade Federal de Goiás, Regional Jataí, with 10 treatments established in a split plot randomized block design, with four replications. Each plot corresponded to one fertilizing level with P and K (0, 50, 100, 200 and 400% of recommended dose) and the sub plots were two spatial arrangements: simple (0,45 m) and twin rows ( 0,25 x 0,65 m). The recommended rate of P and K was 80 kg ha-1 of P2O5 and 80 kg ha-1 of K2O. During the development period of the culture were determined the initial population, Falker chlorophyll index, dry mass, leaf area index, cover factor and nutritional content of the index leaves. When the soybean plants was in growth stage R8 were done the following evaluations: final plant population, plant and first pod insertion height, number of pods and grains per plant, number of grains per pod, mass of thousand grains and yield. The soybean cultivar Anta 82 RR demonstrated small answer for morphological components, with the use alternative spatial arrangements. The increase of fertilizing level, even with rates 2 and 4 times higher than the recommended, allowed soybean response in grain yield for the two studied arrangements. The simple arrangement provides higher grain yield, independently of fertilizing level. / A soja tem sido amplamente cultivada no Brasil e no mundo por sua importância alimentar e econômica, que impulsiona diversos complexos agroindustriais. O objetivo desse trabalho foi avaliar o efeito de arranjos espaciais, simples e fileira dupla, associados a níveis de adubação sobre o desenvolvimento e produtividade da cultivar de soja Anta 82 RR, levando em conta parâmetros produtivos e ecofisiológicos. O experimento foi conduzido na Universidade Federal de Goiás, Regional Jataí, com o delineamento experimental constituído de 10 tratamentos estabelecidos em blocos casualizados, com parcelas subdivididas, em quatro repetições. Cada parcela correspondeu a um nível de adubação com P e K (0, 50, 100, 200 e 400% da dose recomendada) e as subparcelas a dois tipos de arranjos espaciais: simples (0,45 m) e fileira dupla (0,25 x 0,65 m). A dose recomendada de P e K foi 80 kg ha-1 de P2O5 e 80 kg ha-1 de K2O. Durante o período de desenvolvimento da cultura determinou-se a população inicial de plantas, o índice de clorofila Falker, a massa de planta seca, o índice de área foliar, o fator de cobertura e os teores nutricionais das folhas índice. Quando as plantas de soja encontravam-se no estádio R8 foram realizadas as seguintes avaliações: população final de plantas, altura de planta e inserção da primeira vagem, número de vagens e de grãos por planta, número de grãos por vagem, peso de mil grãos e produtividade. A cultivar de soja Anta 82 RR demonstrou pequena resposta para os componentes morfológicos, com o uso de arranjo espacial alternativo. O aumento no nível de adubação, mesmo com doses 2 e 4 vezes maiores que o recomendado, possibilita resposta da soja em produtividade de grãos para os dois arranjos estudados. O arranjo simples proporciona maior produtividade de grãos, independentemente do nível de adubação