Thesis (Ph. D.)--University of Wisconsin--Madison, 1973. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Bibliography: leaves 310-314.

Thesis (M. App. Sc.)--University of Queensland, 2001. / Includes bibliographical references.

Thesis (M.Sc. Agriculture (Agricultural Economics)) -- University of Limpopo, 2021 / Groundnut is one of the most important agricultural crops in South Africa. It provides economic and health benefits to the society. Its production, processing and marketing provides employment to several individuals in South Africa. The objectives of the study were: to identify and describe the socio-economic characteristics of small-scale groundnut farmers, analyse the determinants of commercialization and the factors influencing the choice of market outlet in Capricorn district. The study was conducted in three villages (Ga-Maja, Ga-Mphahlele and Moletjie). Purposive sampling technique was used to select 110 small-scale groundnut farmers. Semi-structured questionnaires were used to collect data from the small-scale groundnut farmers through face-to-face interviews. The data was analysed using the descriptive statistic, Logistic Regression and Multinomial Logit model. SPSS and STATA software were used to process the data. The results indicated that quantity of groundnut produced, occupation, marital status, household size, land size, vehicle ownership, access to credit and extension contact significantly influenced the commercialization and the choice of market outlet of the small-scale groundnut farmers in the study area. The study recommends that the government in collaboration with universities and agricultural colleges as well as the private sector initiate an extension programme that will focus on small-scale farmers, rather than on emerging and commercial farmers only. This will enable the small-scale famers to get access to information on the market, production, price and other agricultural related activities. It further recommends that the Department of Agriculture visit areas where farmers produce the same type of crops and offer them incentives to pool their resources and market their produce collectively. This will improve the bargaining position of the small-scale farmers as well as the means of lowering transaction costs. / National Research Foundation (NRF)

Digitized by Kansas Correctional Industries

No description available.

The association between the growth of peanut (Arachis hypogaea L.) and arbuscular mycorrhizal (AM) fungi of the genus was investigated by measurements; • mycorrhizal status of Glomus spp in diverse substrate soil conditions. • mycorrhizal dependency and nutrient uptake. • potential for mycorrhizal biocontrol of a bacterial pathogen. • mycorrhizal response to salinity stress. •effect of fungicides on Glomus mosseae mycorrhizal association. Generally these investigations indicated that both the AM fungi Glomus mosseae and Glomusfasciculatum were infective to peanuts, but displayed a differential effectiveness depending on the soil microbial biomass content in the soil. Glomus mosseae gave the best overall results in improving peanut growth and therefore it was selected for peanut mycorrhization in further experiments. There appeared to be a threshold' phosphorus requirement level for nonmycorrhizal peanuts, below which relative mycorrhizal dependency of the peanut was inclined to be significantly pronounced. Glomus mosseae protected peanut seedlings against the pathogenic bacterium Erwinia carotovora, it suppressed the pathogen population, improved the nutritional status of the plant, decreased the susceptibility of peanut seedlings to the bacterial soft rot disease and significantly alleviated disease effects. The fungus also demonstrated an ability to reduce NaCl salt stress syndrome. Glomus mosseae/peanut association in soils treated with relatively high dosages of Aspor and Plantvax fungicides was seriously affected and did not improve peanut growth substantially and appears to result in the loss of mycorrhizal benefits. This study indicates that Glomus mosseae may be a potential component to improve peanut production in low-input sustainable agrosystems.

Thesis (Ph.D.) -- University of Adelaide, Dept. of Agronomy and Farming Systems, 2000. / Bibliography: leaves 189-202.

Thesis (Ph. D.)--Virginia Polytechnic Institute and State University. 1991. / Vita. Abstract. Includes bibliographical references (leaves 35-39). Also available via the Internet.

Thesis--Auburn University, 2009. / Abstract. Vita. Includes bibliographic references.

Thesis (Ph.D.)--University of Nebraska-Lincoln, 2008. / Title from title screen (site viewed Mar. 5, 2009). PDF text: xiv, 231 p. : ill. (some col.) ; 4.69 Mb. UMI publication number: AAT 3331368. Includes bibliographical references. Also available in microfilm and microfiche formats.