The primary objectives of this study are:

Hassan district is located in the state of Karnataka, India. It lies between latitudes 12°30' N and 13°33' N and longitudes 75°33' E and 76°38' E. The district covers an area of 6,814 square kilometers and comprises eight taluks: Alur, Arkalgud, Arasikere, Belur, Channarayapatna (C.R. Patna), Hassan, Holenarasipura (H.N. Pura), and Sakleshpur. The district is characterized by a diverse topography, with hilly regions in the west and plains in the east. The climate is predominantly tropical, with a mix of wet and dry seasons, making it suitable for the cultivation of a wide variety of crops.

In 1990-91, Alur Taluk demonstrated a strong emphasis on rice cultivation, with an LQ of 2.07, indicating that rice was more concentrated in Alur compared to other taluks. Additionally, sugarcane (0.44) and high-yield crops (1.13) were also prominent, suggesting a balanced focus on both food crops and cash crops. The moderate concentration of other pulses (0.28) and groundnut (0.09) indicates some diversification, although these crops were less dominant.

Arkalgud Taluk presented a diversified crop pattern, with notable concentrations in rice (1.42), tur (1.78), and groundnut (1.58). The high LQ for gram (1.33) reflects a local specialization in pulse cultivation. This taluk had a relatively even distribution of crops, balancing food grains and pulses, although jowar and other minor millets were not significant in this region.

In Arsikere Taluk, the focus was on dryland farming and cash crops, with high concentrations in jowar (1.85) and cotton (2.36). The presence of ragi (1.36) and tur (1.38) further underscores the emphasis on drought-resistant crops. Maize (0.09) and other pulses (0.66) were cultivated to a lesser extent, indicating a reliance on crops suitable for the region's climatic conditions.

Belur Taluk showed a strong concentration in maize (3.27), cotton (3.00), and sugarcane (1.78), suggesting a mix of food and cash crops. The high concentration of high-yield crops (1.08) points to the taluk's potential for agricultural productivity. However, the low presence of other pulses (0.58) and groundnut (1.08) indicates a lesser focus on these crops.

C.R. Patna Taluk was characterized by a significant concentration in sugarcane (4.88), making it the dominant crop. The presence of tur (1.25) and groundnut (0.92) suggests some diversification, though to a lesser extent. This taluk had low concentrations of ragi (0.09) and maize (0.0), indicating a limited focus on cereal crops.

In Hassan Taluk, maize (2.46) and gram (2.33) were the most concentrated crops, reflecting a focus on cereal and pulse cultivation. The taluk also had a moderate concentration of high-yield crops (1.04), but lower values for rice (0.05) and ragi (1.18), suggesting a balanced but somewhat limited diversification.

H.N. Pura Taluk exhibited a strong emphasis on rice (1.27) and tur (1.54), with moderate concentrations in other pulses (1.54) and ragi (1.0). The presence of high-yield crops (0.88) indicates a potential for increased productivity, but the taluk had lower concentrations of maize (0.09) and groundnut (0.08).

Finally, Sakleshpur Taluk had an extremely high concentration in rice (4.69), showing a dominant focus on this crop. The taluk had very low diversity in other crops, with little to no concentration in categories such as maize, minor millets, and pulses. This suggests a highly specialized agricultural practice centered around rice cultivation.

By 2004-05, Alur Taluk had shifted its focus significantly towards maize (3.75) and coffee (2.57), reflecting a move towards more commercial and high-value crops. While rice (2.15) remained important, the taluk diversified by introducing vegetables (0.86) and spices (1.33). The reduction in minor pulses and groundnut concentration suggests a transition away from traditional food crops towards crops with greater market demand.

Arkalgud Taluk continued to diversify, with increased concentrations in rice (2.36), tur (1.25), and groundnut (1.0). The introduction of sunflower (3.1) and oil seeds (1.92) highlights a shift towards cash crops. The high concentration in supari (4.0) and spices (1.61) suggests a strategic focus on high-value crops, reducing the emphasis on traditional cereals like jowar (0.8) and ragi (0.25).

In Arsikere Taluk, there was a marked increase in the cultivation of sunflower (3.1) and oil seeds (1.92), indicating a strategic shift towards commercial crops. While jowar (1.28) and gram (3.0) remained significant, the taluk introduced new crops such as vegetables (0.46) and spices (0.25), further diversifying its agricultural output.

Belur Taluk saw a shift towards maize (2.21) and coffee (2.18), with a continued focus on sugarcane (1.5). The taluk also diversified into vegetables (0.22) and spices (0.5), although the concentration of traditional food grains like ragi (0.76) and pulses remained moderate. The introduction of coffee as a significant crop highlights a shift towards plantation crops with higher economic returns.

C.R. Patna Taluk maintained a strong focus on sugarcane (4.75) and coconut (2.58), with a lesser emphasis on traditional crops like ragi (1.02) and jowar (0.7). The introduction of oil seeds (0.46) and spices (0.25) suggests some diversification, but the taluk remained focused on a few key high-value crops, reducing its reliance on food grains.

In Hassan Taluk, there was an increased focus on ragi (1.84) and other pulses (8.99), reflecting a shift towards cereal and pulse cultivation. However, the taluk diversified its crop portfolio by introducing vegetables (3.08) and oil seeds (0.75), while reducing its focus on traditional cash crops. This suggests a strategic move towards crops with higher nutritional and economic value.

H.N. Pura Taluk demonstrated significant changes, with a focus on other pulses (2.56), oil seeds (2.62), and ragi (1.34). The introduction of new crops such as vegetables (0.44) and spices (0.25) indicates a broader diversification strategy. The taluk reduced its reliance on traditional food grains and focused more on crops with higher market demand and resilience.

Sakleshpur Taluk continued its specialization in rice (2.01) and coffee (4.57), but also introduced spices (4.04), indicating a strategic focus on high-value plantation crops. The taluk had very low diversity in other crops, maintaining its traditional focus on a few key agricultural products.

The crop concentration indices for Hassan District in the years 1990-91 and 2004-05 reveal a significant shift in the agricultural focus of the region. The comparison of these two periods provides insights into how the district's agricultural landscape has evolved over 14 years, reflecting broader economic, environmental, and market trends.

One of the most prominent changes between 1990-91 and 2004-05 is the district's shift towards more commercial and high-value crops. In 1990-91, crops such as rice and sugarcane dominated in several taluks. For instance, Sakleshpur Taluk had an exceptionally high concentration in rice (LQ of 4.69), and C.R. Patna Taluk was heavily focused on sugarcane (LQ of 4.88). However, by 2004-05, there was a noticeable shift towards crops like maize, coffee, sunflower, and oil seeds. For example, Alur Taluk increased its concentration in maize (LQ of 3.75) and introduced coffee as a significant crop (LQ of 2.57). Similarly, Arsikere Taluk saw a strong rise in sunflower cultivation (LQ of 3.1) and oil seeds (LQ of 1.92).

The data from 2004-05 shows a greater diversification of crop patterns across the district compared to 1990-91. In 1990-91, several taluks had a narrow focus on a few key crops, such as rice, jowar, and sugarcane. Arkalgud Taluk, for instance, was primarily concentrated on rice, tur, and groundnut. By 2004-05, this taluk had diversified significantly, introducing crops like sunflower, oil seeds, and supari (LQ of 4.0). This trend towards diversification is also evident in Hassan Taluk, where the concentration of other pulses rose dramatically (LQ of 8.99) alongside the introduction of vegetables (LQ of 3.08) and oil seeds (LQ of 0.75).

There is a clear decline in the concentration of traditional crops like rice, ragi, and jowar in several taluks. In 1990-91, rice had a high concentration in taluks such as Alur (LQ of 2.07) and Sakleshpur (LQ of 4.69). By 2004-05, although rice remained important, its relative concentration had decreased, with other crops gaining prominence. Belur Taluk, for instance, saw a reduction in ragi (LQ of 0.76) and a shift towards maize (LQ of 2.21) and coffee (LQ of 2.18). Similarly, Hassan Taluk showed a decrease in the concentration of rice and an increased focus on pulses and vegetables.

The 2004-05 data also reveals the introduction of new crop categories that were either absent or less significant in 1990-91. For instance, vegetables and spices emerged as important crop categories in several taluks. Arkalgud Taluk introduced spices (LQ of 1.61) and increased its concentration in vegetables (LQ of 1.38). In contrast, these crops were not prominent in the 1990-91 data, indicating a strategic shift towards more diversified and potentially more profitable agricultural practices.

Despite the overall trend towards diversification, some taluks maintained their specialization in specific crops. Sakleshpur Taluk continued its strong focus on rice (LQ of 2.01) and coffee (LQ of 4.57) in 2004-05, similar to its earlier concentration on rice in 1990-91. This suggests that certain regions within the district have remained consistent in their agricultural focus, likely due to favorable environmental conditions or established market channels for these crops.