No description available.

No description available.

No description available.

No description available.

No description available.

Thesis (doctoral)--University of Chicago, 1930. / "Part of a dissertation ..." Includes bibliographical references (p. 31-32).

A fertility study was initiated at the Maricopa Agricultural Center in 1984 to determine how nitrogen levels influenced growth, development, and root yield of the potential domesticate, buffalo gourd (Cucurbita foetidissima). Nitrogen had little or no effect upon the following parameters: seedling emergence, early growth rates, specific leaf weights, individual root weights, consumptive water use, canopy organic N content, and nitrate and ash content of all organs. Percent root dry matter and total carbohydrate content dropped linearly as N was increased, whereas canopy dry matter production, root organic N content, petiole nitrate concentration, and leaf area indices exhibited a positive linear response. A quadratic response curve best fitted fresh weight root yields, total root dry matter and carbohydrate production, water use efficiencies, and final plant populations. A modest amount of N (84 kg ha⁻¹) provided maximum yield response in this feral species grown at 405,000 plants ha⁻¹.

No description available.

No description available.

Submitted by Ana Emília Barbosa Tavares (anaemiliatavares@yahoo.com.br) on 2018-06-27T15:52:54Z No. of bitstreams: 1 Tese Ana Emilia B Tavares Final 1.pdf: 936956 bytes, checksum: a3767d2390fa0af7099db828d8a6b1ce (MD5) / Approved for entry into archive by Maria Lucia Martins Frederico null (mlucia@fca.unesp.br) on 2018-06-28T11:25:57Z (GMT) No. of bitstreams: 1 tavares_aeb_dr_botfca.pdf: 849769 bytes, checksum: 54d5ca11d9d4355f85939d41a48cd5f3 (MD5) / Made available in DSpace on 2018-06-28T11:25:57Z (GMT). No. of bitstreams: 1 tavares_aeb_dr_botfca.pdf: 849769 bytes, checksum: 54d5ca11d9d4355f85939d41a48cd5f3 (MD5) Previous issue date: 2018-01-19 / Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) / Objetivou-se avaliar o efeito de doses e parcelamentos da adubação nitrogenada em cobertura na produção e teor de macronutrientes de frutos imaturos de abobrinha-demoita. Foram conduzidos dois experimentos, com treze tratamentos, no esquema fatorial 4x3+1, com quatro doses de nitrogênio em cobertura (62,5; 125,0; 187,5; 250,0 kg ha-1 de N), três parcelamentos (1 6 ⁄ + 1 3 ⁄ + 1 2 ⁄ ; 1 4 ⁄ + 1 2 ⁄ + 1 4 ⁄ e 1 3 ⁄ + 1 3 ⁄ + 1 3 ⁄ ) e um tratamento sem adubação em cobertura (dose zero), com quatro repetições. Os experimentos 1 e 2 foram conduzidos no ano de 2014 e 2015, respectivamente. Foram avaliados número de frutos total e comercial por planta, produção (g planta-1) total e comercial, comprimento, diâmetro e massa média de fruto comercial. Apenas no experimento 2 foi avaliado o teor de macronutrientes nos frutos. No experimento 1, o parcelamento 1 4 ⁄ + 1 2 ⁄ + 1 4 ⁄ proporcionou maior número de frutos total e comercial. No experimento 2, o aumento das doses nos parcelamentos 1 6 ⁄ + 1 3 ⁄ + 1 2 ⁄ e 1 3 ⁄ + 1 3 ⁄ + 1 3 ⁄ proporcionou incremento linear na produço de frutos total e comercial. A ordem decrescente de teores de macronutrientes nos frutos imaturos, foi de K>N>P>Ca>Mg>S.