Analysis of the Contribution of Home Gardens to Household Food Security in Limpopo Province, South Africa

Addressing food security is one of the national priorities in South Africa, enshrined under the country’s constitution, yet there is a growing percentage of households struggling to meet their food requirements. Food insecurity and malnutrition remain severe problems in rural communities and can be addressed through home gardening. This study aimed to assess the contributions of home gardens to food security in Limpopo Province. This study employed a quantitative research methodology. A total of 2043 rural households were selected using multistage stratified random sampling. The Household Food Insecurity Access Scale (HFIAS) was used to measure household food insecurity levels of home garden participants. Results showed that 46% of participants were food secure, 24% were severely food insecure, 17% were moderately food insecure and 13% were mildly food insecure. The results from the endogenous switching Poisson regression model showed that gender, household size, wage/salary, access to land, agriculture-related assistance and market distance had a positive influence on household food security of home garden participants. On the other hand, employment status and receiving any social relief had a negative association with household food security of home garden participants. The results also showed that employment status had a positive influence on the food security of home garden non-participants, while education, access to land, wage/salary and age had a negative influence. The results from average treatment effects (ATEs) showed that households that participated in home garden production had a negative and significant (p-value < 0.05) impact on household food insecurity. This study concludes that involvement in home gardening improves food security. Household food security can be enhanced through agricultural training and skills enhancement directed at increasing participation in home gardening in rural areas, thus addressing income and food security challenges. Agricultural education needs to be introduced and facilitated at school levels so that an understanding of food systems, nutrition and food security can be attained from younger age groups.


Introduction
Globally, there are ongoing considerations for better and more sustainable ways to feed the growing population.By the year 2050, the global population is predicted to reach over 9 billion [1,2].Some countries will have difficulty meeting the growing demand which could lead to hunger and food insecurity for many households struggling to cope with food price volatilities and local food production limitations.This is the reality for many households within the lower income range that cannot be guaranteed access to sufficient food [3,4].In 2020, Statistics South Africa recorded that 23.6% of South Africans ranged from moderately to severely food insecure, while 14.9% experienced severe food insecurity [5].Out of 113 countries, South Africa ranked as the most food secure in the African continent [6].South Africa is considered as food secure, technically, as it produces enough staple food to feed its population.However, rural households continue to encounter food security difficulties.
Multiple strategies are required to address the growing food production and food insecurity challenge.The success of these strategies relies primarily on existing sociopolitical conditions, the existing economic climate and available resources [7].Home food gardening is perceived as a successful strategy that can contribute towards increasing food access.Although home food gardens have evolved over the years as societies go through urbanization, they have been an essential component for families providing their own food all over the world [1,8].Home food gardens are described as a family-managed microenvironment within a larger farming system that frequently exhibits high levels of species diversity [9][10][11].
Home food gardens are among the most important sources of food in developing countries, as they significantly contribute to households' food consumption needs for improved health and nutrition [12,13].Home food gardening is practiced in most rural areas in South Africa as a source of household income and food consumption [11].Home garden programs contributed towards a reduction in food insecurity [11].In addition, home gardens are considered as a community's most adaptable and accessible land resource that plays a significant role in reducing household vulnerability while ensuring food security [14,15].They ensure quick access to food that can be harvested, prepared and eaten by family members regularly and with ease.To some extent, they are a production system that can easily be accessed by under-resourced households.Household farming has the potential to provide a variety of foods that can increase the quantity and improve the quality of nutrients for household diets [4,12].
Despite the potential benefits and opportunities that home gardening provides to rural households, there are various factors that can hinder production.These factors include lack of farming skills, availability of space and water, security of tenure, availability of time, and pest and disease occurrence.In addition, there is a lack of planting materials, an inadequate supply of quality seeds [16] and a lack of finance.Other constraints include a lack of access to water, poor soil fertility, limited access to agricultural inputs, limited marketing opportunities, and a lack of information and advisory services [7,14].These challenges accelerate food insecurity among low-income households as they affect the production of diversified foods.
South Africa established a food security policy enshrined in the Bill of Rights, Section 27, 1 (b), which highlights that every citizen has a right to access to sufficient food and water and that the state must take reasonable legislative and other measures to achieve this [15].The Food and Nutrition Security Implementation Plan was formulated to assist and emphasize the need for households to produce food to address household food insecurity and hunger.In the same light, the objective of the then Department of Agriculture, Forestry and Fisheries (DAFF) (now renamed the Department of Agriculture, Land Reform and Rural Development) was to develop agricultural policies and initiate projects that would ensure South Africans could produce their food to be food secure.This objective is closely aligned with the Food and Nutrition Security Implementation Plan.Both are fundamental for achieving Goal 2 of the Sustainable Development Goal: ending hunger and achieving food security and nutrition [17,18].
For context-appropriate policies and programs to be implemented that enhance home gardening for rural dwellers, there is a need to first determine how home gardens contribute towards household food security as well as the gaps and opportunities that may present themselves.In the past, South Africa implemented the One Home One Garden initiative, to encourage and equip households predominantly in rural areas to participate in cultivating their own food, hoping to alleviate hunger and reduce food insecurity [19].Rammohan et al. [9] examined the role of home gardens in alleviating household food insecurity and improving dietary diversity among rural households in Myanmar.Saediman et al. [20] investigated the contribution of home food gardening to household food security in Indonesia.In addition, Issahaku et al. [21] examined farmers' decisions to engage in subsistence home gardening and its impact on food and nutrition security among farm households in Rwanda.Although studies were conducted internationally, they demonstrate the gap in the South African context relating to home food gardens and their contribution to household food security.In light of this background, this study aims to identify the various ways that home gardens contribute towards reducing household food insecurity in Limpopo Province, South Africa.

Methodology Description of Study Areas
This study used secondary data collected in Limpopo in 2021.Limpopo is one of the most resource-poor provinces in South Africa [22,23].The gender composition structure is skewed towards the youth population where there are increasing population numbers among infants, teenagers and youth [24].Data were collected in three areas within Limpopo province: Lobowa, Ganzankulu and Venda, shown in Figure 1 below.The total provincial population is 6.015 million people, 1.641 million households.The province has the third highest Human Development Index (HDI) in South Africa, 0.710 [25].More than 2 million people were recorded to be unemployed in 2017, the majority being the youth, which highlights the need to increase labor force participation and job opportunities [24,26].Most residents live in rural areas, which have given rise to an abundance of (privately owned) housing developments over a short period of time as the province is now known as having the highest percentage of people living in formal housing in the country.Limpopo is known for its diversified agricultural activities.Cattle farming, staple crops such as maize and sunflowers, cotton, and tropical fruits are grown for domestic sales and international export.Water supply is the main problem facing the agricultural sector, as well as households.To address this challenge, many drill boreholes within their premises for water accessibility [27].

Data Collection
A total of 2043 respondents were surveyed, using structured questionnaires, to understand the status of food and nutrition security of participating households.Information collected included demographics and household welfare data.The information used in this study was extracted to obtain a comprehensive understanding of the contribution of home gardening production and household food security.This study used a quantitative research approach and the multistage stratified random sampling technique for the selection of household heads from different municipalities and districts.

Data Analysis
The quantitative data were analyzed using STATA statistical software (version 13) and Statistical Software for Social Sciences (SPSS) version 24.A descriptive statistics analysis was performed to compare the sample population's socio-economic factors and food security status between rural households participating in home gardening production.The food security assessment used the internationally accepted food measurement tool, the Household Food Insecurity Access Scale (HFIAS).
The HFIAS evaluates the level of food insecurity (access) [28].The HFIAS has nine questions based on an individual's food access uncertainty and anxiety.A coded frequency for each of the nine occurrence questions related to household-level food access was used to determine the HFIAS score for each household.The maximum score for each of the nine questions is 3, while the total score, when added together, has a maximum of 27, and a minimum score of 0. The scores indicate how secure the household's access to food is, with a higher score indicating greater food insecurity and a lower score indicating greater food security [28].The HFIAS has four categories: secure, mild, moderate and severe.

Endogenous Switching Poisson Regression Model
Following other empirical studies [29,30], this study used the endogenous switching Poisson regression model to assess the contribution of home gardens to household food security.The model was designed by Terza [31] and Miranda [32], who stated that given the ith household from a random sample I = {1 . . ..n} conditional on a vector of explanatory variables X i , an endogenous dummy C i and a random term ε i , the dependent variable Y i , which is a count, is supposed to follow a standard Poisson distribution as follows: where β and γ are coefficients to be estimated.The error term ε i measures omitted, as are unobserved variables as well as any measurement error.Given a vector of explanatory variables Z i (which may contain some or all elements of) X i , C i is characterized by an index process: where α is a vector of coefficients to be estimated.Suppose that W i represents all endogenous variables and ε i and V i are jointly normal with mean zero and covariance matrix , given that ε i , C i and Y i are independent.Hence, the joint conditional probability density function of Y i and C i , given W i , can be written as where f (ε i ) denotes the probability density function for the random term ε i .

Results and Discussion
The aim of this study was to analyze the association of home gardens with household food security, with a particular focus on the rural areas of Limpopo province.This is important as it places a particular focus on one geographical region that has unique characteristics and needs that could differ in comparison with other provinces in South Africa.This section discusses the results obtained from the HFIAS as a standard food security measurement tool and the quantitative data analyzed using STATA and SPSS.

Descriptive Results
This study involved 2043 rural households, of which 53.8% were female and 46.2%, were male.The minimum age of the household head was 18 years old, the maximum was 103 years old and the mean was 53.9 years old.Women were seen as the dominant gender in home gardening.Table 1 below displays the demographic characteristics of households.This may imply that they have a responsibility to care for the family while ensuring there is sufficient food for the family's needs, especially for those unable to find formal employment.This study finding was consistent with the findings of Oguttu et al. [33] and Bhandari et al. [34], who found rural women more involved in home food gardening compared to their male counterparts.Adeosun et al. [35] also found that female-headed households positively influenced households' home gardening and food accessibility, more than male-headed households.(Table 1).The average age of the participants was 53 years old; older individuals participated more in home gardening production than younger persons, and the average household had an average of five members.Older study participants were more likely to participate in home gardening than younger participants.Schooling is compulsory for children between the ages of 7 and 15 in South Africa.Regarding primary and secondary educational levels, the results revealed that 27.3% had a primary level, 42.2% had a secondary level and 18.2% had no schooling, while a lower proportion of participants obtained post Matric qualifications.The lower the household's educational level, the less probability of home garden participation.Educational status plays an important role as decisions made are influenced by knowledge of home gardening and its intended benefits for the family.For example, those with more knowledge about nutritional and economic benefits may contribute towards increased participation and food security attainment [14].Akerele et al. [36] emphasized similar findings where household members with formal education participated in home gardens more, in comparison with those with informal education.
The quantitative data showed that 70.7% of home garden farmers were unemployed, suggesting that most rural households had a significant reliance on home gardening for food and income sources.The high unemployment rate in Limpopo was felt mostly in women-headed households, as detailed in a study by Kongolo [23] and a case study by Wanka [26].Wanka found most household heads to be unemployed without any source of income, which is also evident in this current study.These findings are characteristic of the statistics that list Limpopo as having the third highest unemployment rate of 49.9%, after North West and Eastern Cape [37].

Occurrence of Household Food Insecurity Based on HFIAS Categories
Figure 2 illustrates the occurrence of household food insecurity which was determined using the Household Food Insecurity Access Scale (HFIAS).The findings indicated that almost 46% of households were food secure and 13% were mildly food insecure.The results also showed that 17% of households were moderately food insecure, while 24% of households were severely food insecure.These findings indicate that 54% of households faced difficulties in accessing food.Similar findings were reported in a study conducted by Sibathu and Qaim [38], where smallholder farmers were found to be food insecure.Poverty and food insecurity affect mainly Black Africans, and many are located in rural areas where food insecurity thrives [39,40].In 2001, more than two-thirds of impoverished households were located in rural areas where food insecurity peaked [40,41].While the current study takes place almost two decades later, this research reveals minimal changes in terms of the food insecurity experienced by households in the country.

The Contribution of Home Garden Participation to Household Food Security-Endogenous Switching Poisson Regression Model
The estimated results of the endogenous switching regression model are presented in Table 2 below.A selection bias was detected and represented by the significant correlation coefficients of the selection equations.The significant results of the sigma (σi), rhos (p) and athrho indicated self-selection problems.A positive athrho value indicates that some unobservable factors affected home gardening participation.However, the endogenous switching regression model was used to address the endogeneity issue.The first stage of the endogenous switching regression analysis (the selection model) estimated the household determinants of home garden participation.The second stage estimated the effect of household determinants on the food security of home garden participants and non-participants.
Gender plays a critical role in home garden production, resulting in a positive contribution towards household food security.The current study established that the gender of the household head had a positive and significant impact on the food security status of the home garden participants.This means that females participated more in home gardening.These findings are consistent with the findings from [42], which showed women participated more in communal homes than males.Gbedomon et al. [43] also found women were more associated with home food gardens than men.Globally, women are renowned for their effective roles in agriculture as they contribute meaningfully to ensuring food security in various households.The studies further explained that women are also caregivers; thus, participating at home could be one major way in which women see themselves contributing towards food accessibility for their families, especially in times of food shortages brought about by lack of income.Although women play an important role in home gardens by ensuring food access for their families, the unequal distribution of resources in comparison to men makes women and children more susceptible to poverty and food insecurity.The age of the household head had a negative and significant (p-Value 0.10) impact on the food security status of home garden non-participants.This finding implies that as the age of the household heads increases, their level of participation in home garden production decreases, which leads to food insecurity.Youth tend to have negative [44] and, at times, varying perceptions and aspirations regarding agriculture [44,45].These mixed perceptions may negatively impact households, especially with youthful members not interested in agricultural activities due to preconceived social misconceptions and a lack of skills.On the contrary, study results from Gbedomon et al. [43] showed a significant proportion of adults and mature-aged people participating at home.The age disparity further emphasizes the need to involve younger people in the cultivation of food and the home garden value chain.
The inception of poverty is seen in a household's inability to meet their basic needs such as finances to secure food items and other necessities.The results showed employment status had a significant impact on the food security of both home garden participants and non-participants, which was also found in studies by Mishra et al. [46] and Reardon [47], who emphasized the importance of income on household food security.The employment status had a positive impact on the food security status of the non-participants, while it showed a negative impact on the food security of home garden participants.This implies that households that did not participate in home gardening production were able to use earnings to buy food items, which contributed to being food secure, while households that participated in home gardens were negatively impacted by lack of employment brought on by lack of income for food items, thus negatively impacting their food security.Anderson [48] found that households produced their own food for consumption inadequate for meeting the household's dietary needs which led to the increased need for off-farm employment to aid in accessing food items, while Mishra et al. [46] documented a positive relationship that was found between employment and food security-showing similar findings to this current study.Additional research is required to address the nuances and complexities regarding the concept of food self-sufficiency in relation to home gardens.
Household size showed a significant relationship with home garden participants, which implies that household size may contribute to more garden participation, further contributing to food accessibility.Other studies have revealed household size to be one of the determinants of food security [49,50].Dzanku [51] shared that smallholder farmers have a large dependency on their own household members for on-farm or off-farm income generation.Similar to the findings of the current study, Aidoo et al. [52] concluded household size is among the factors that affect food security, where the probability of a household being food secure increased with household size, while Sikwela [53] showed contradicting findings where household size was found to influence household food insecurity significantly due to increase in the demand for food.
Increasing home food production alone might not provide sufficient steady supplies for prolonged periods.This is where additional income plays a critical role.Working for a wage had a positive and significant impact on the food security of home garden participants at a level of 1%.However, it had a negative impact on the food security of home garden non-participants.This shows that home garden participants were also working to earn supplemental income, to buy other types of food outside of home gardens.On the contrary, home garden non-participants who worked for a wage or salary had increased chances of being food insecure, possibly due to the sole reliance on purchased foods, without access to home garden produce for additional food accessibility.Dzanku [51] found that when offfarm income is obtained by household members, the average food availability is increased.This in turn decreases the chances of those households experiencing food insecurity.
Social relief funds had a negative impact and statistically influenced the food security status of home garden participants.Ntombela et al. [54] noted how South Africa has a large population (20%) that cannot feed itself, due to insufficient resources.Similar findings were documented by Chakona and Shackleton [55,56] by comparing households that received social grants and those that did not: households that were more food insecure were those receiving social grants or relief.Ideally, receiving social relief funds is associated with increased food security, contrary to the findings of this study.To understand the food insecurity dynamics for households in rural households in Limpopo, these findings suggest further qualitative investigation is required to ascertain detailed reasons as to how and why social relief funds have a negative impact on household food security.
South Africa has historical backdrops of socio-economic and natural resource inequality, which remains a reality in current times.Access to land plays a significant role in agricultural participation.The findings of this study showed access to land had a negative impact on home garden participation and food security of non-home garden participants.However, it indicated a positive result for the food security of home garden participants, which implies that households with minimal or no access to home gardening land were limited in their ability to participate, which negatively affected their food security.Those who participated could utilize the land they had access to produce and contribute towards their food security.Findings from Onomu et al. [14] revealed that many participants did not grow certain crops due to a lack of available land.Land inaccessibility, especially among women, inhibits food production activity.Land accessibility challenges are not unique to South Africa.In Kenya, the inheritance and ownership of land by women are greatly challenged due to various customary and statutory land tenure systems, which adversely affect women's land rights and land usage, thus further posing a negative impact on the food security status of households [57].Agricultural land availability is a crucial determinant of household food as it directly correlates with land usage activities [14,58].Menon et al. [59] further conclude that women's land ownership yields beneficial results for the household and contributes to well-being and higher status.
Agriculture-related assistance results showed a negative and significant impact on home garden participation and a positive influence on the food security of home garden participants.Food insecurity is brought about by various factors among households, which can be remedied to a certain degree with the facilitation of agriculture-related assistance.This may be in the form of agricultural training, input supplies, availability of extension workers, financial support and resource allocation directed at improving home garden farming.The current study has shown how important agricultural assistance is in improving household food security, especially encouraging home gardening in Limpopo, similar to Oladipo and Grobler's [60] finding on the importance of agriculture-related assistance to home in South Africa as this contributes towards household food security through increased food production.
Lastly, the results showed that market distance had a positive and significant impact on the food security of home garden participants.Market accessibility impacts rural households' food security more as farmers are both manufacturers and users [61].Farmers sell their products at markets and buy food and other items for their sustenance [62].When home gardens reach harvesting season, their produce often exceeds quantities of food usually purchased from the market, providing food access and profits.The findings of this study confirmed the importance of market distance in ensuring household food security.Factors such as long distances may lead to transportation costs related to rising fuel prices, which may hinder market accessibility and inability to sell produce by home garden farmers.Munawar et al. [61] also state how expensive transportation costs have contributed towards restricting food access due to the domino effect on food prices.

Treatment Effects of Impact of Home Garden Participation on Household Food Insecurity
This research aimed to see how home garden participation affected household food security.A simple significant difference in food security between non-home garden participants and participants can be biased and fails to account for potential heterogeneity in the two groups' characteristics.As a result, this study used average treatment effects (ATEs), average treatment effect on the treated (ATT) and average treatment effect on the untreated (ATU) to compare the potential outcomes.Findings from treatment effects are presented in Table 3.The ATT had a positive sign, but it was not significant, which means that home garden participants did not have any considerable effect on the food insecurity status of households.According to the ATE estimate, the average smallholder farmer who participated in the home garden production had improved food security, as results showed that home gardens had a negative and significant (p-Value < 0.05) effect on household food insecurity.The results are also similar for the ATU estimates, which showed negative and significant results for household food insecurity.

Conclusions
This study brings to light the critical role that home gardening plays in addressing food security challenges in rural communities, as shown by the key findings from this study conducted in Limpopo Province.The high prevalence of food insecurity among households highlights the urgent need for implementing effective interventions.
This study found factors such as gender, household size, access to land and proximity to markets were major influencers of household food security.Importantly, this study showed a positive impact on food security among households that participated in home gardening.
To further enhance food security and promote sustainable livelihoods in rural communities, targeted interventions are required.Agricultural training and skill-building programs can potentially empower individuals to effectively engage in home gardening, thus increasing access to nutritious food and supplementary income.In addition, the integration of agricultural curricula can foster a systematic and deeper understanding of food systems from a young age, providing a foundation for informed decisions about food production and consumption within households.By the identification of the significance of home gardening in rural communities by policymakers and stakeholders, the challenge of food insecurity can be directly addressed.

Figure 1 .
Figure 1.Map of demarcation district municipalities in Limpopo province.

Figure 2 .
Figure 2. Pie chart showing the Household Food Insecurity Access Scale results.

Table 1 .
Demographic characteristics of Limpopo households.

Table 2 .
Impact of home garden participation on household food insecurity-endogenous switching Poisson regression model.

Table 3 .
Treatment effects of the impact of home garden participation on household food insecurity.